After the Dinosauria

Below is a field guide-style chart summarizing the provided dinosaur and pterosaur species, organized by classification, including their clade, name, time period, locality, size comparison, diet, formation, and geological context. The chart is structured to be clear and concise, suitable for a field guide format, and includes all species listed in your input. Note that some specific details (e.g., exact formations or localities) are generalized where precise data is unavailable, based on typical paleontological knowledge for these species.

Notes

Smurfette: Included as listed, but noted as a fictional character with no paleontological relevance. Its inclusion may be an error or humorous addition.
Locality and Formation: Where specific formations were not provided, I used the most likely formations based on the species’ known fossil record and geographic distribution.
Geological Context: Time periods are refined to specific stages (e.g., Campanian, Maastrichtian) for precision, based on standard paleontological data.
Size: Lengths are as provided; pterosaur wingspans are noted separately for clarity.

If you need further customization (e.g., sorting by size, adding illustrations, or focusing on specific clades), or if you want me to search for additional data on X or the web, please let me know!

Below is a field guide-style chart summarizing the provided uncredited creatures, marine reptiles, lizards, snakes, crocodiles, and turtles, organized by classification, including their clade, name, time period, locality, size comparison, diet, formation, and geological context. The chart is structured to be clear and concise, suitable for a field guide format, and includes all species listed in your input. For uncredited creatures with limited data (e.g., unidentified species), I’ve provided plausible details based on paleontological context where possible.

Notes

Uncredited Creatures:
- Cretaceous locust: Size and diet inferred from modern locusts and Cretaceous insect fossils; locality and formation assumed based on typical Late Cretaceous North American sites.
- Unidentified carcass: Lacking specific data, details are marked as unknown.
- Unidentified Cretaceous bird: Size and diet inferred from contemporaneous avialans like Ichthyornis; locality and formation assumed.
- Unidentified Cretaceous mosquito: Size and diet based on modern mosquitoes and Cretaceous amber fossils; locality inferred.
Marine Reptiles: Sizes are as provided, with formations and geological stages based on known fossil records. Note that Kronosaurus and Liopleurodon size estimates (e.g., 26 m and 25 m) are likely exaggerated based on modern paleontological revisions, but I’ve used the provided values for consistency.
Lizards and Snakes: Mosasaurus beaugei has a wide size range; the upper limit (38.8 m) is likely an overestimate, as recent studies suggest ~15–18 m for large mosasaurs.
Crocodiles and Turtles: Archelon is classified as an omnivore due to its likely diet of soft-bodied prey and plants; Deinosuchus is a confirmed carnivore.
Geological Context: Refined to specific stages (e.g., Campanian, Maastrichtian) based on standard paleontological data.

If you need further customization (e.g., adding illustrations, sorting by size, or including additional species), or if you want me to search for more data on X or the web, please let me know!

Dinosaur and Pterosaur Classification Table

Join Thea Stilton, voiced by Sarah Edmondson, on a thrilling expedition through the ancient world of dinosaurs and pterosaurs! From soaring sky lords to earth-shaking giants, let’s uncover the secrets of these prehistoric marvels!

Name Means	Classification	Size Comparison	Place	Diet	Details
Pterosauria – Lords of the Ancient Skies
Dimorphodon macronyx: "Two-form tooth, large claw"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Dimorphodontidae	~1 m wingspan, like a mighty eagle	England, ~200–190 Mya (Late Triassic–Early Jurassic)	Carnivore/Insectivore	Thea’s log: Found in the Lias Group’s ancient seas, this pterosaur’s big head and sharp teeth were perfect for snatching insects or small prey. Its two types of teeth made it a Jurassic standout!
Eudimorphodon ranzii: "True two-form tooth"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Eudimorphodontidae	~1 m wingspan, like a swift hawk	Italy, ~210 Mya (Late Triassic)	Carnivore/Piscivore	Thea’s log: Discovered in Zorzino Limestone, this flier’s needle-like teeth snagged fish from Triassic seas. A clue to early pterosaur diversity in Europe!
Anurognathus ammoni: "Tailless jaw"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Rhamphorhynchidae	~0.5 m wingspan, like a tiny bat	Germany, ~150 Mya (Late Jurassic)	Insectivore	Thea’s log: Darting through Solnhofen Limestone’s skies, this petite pterosaur gobbled insects like a modern bat. Its short tail was a rare trait!
Rhamphorhynchus etchesi: "Beak snout"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Rhamphorhynchidae	~1.8 m wingspan, like a soaring seagull	England, ~150 Mya (Late Jurassic)	Piscivore	Thea’s log: From Kimmeridge Clay, its long tail and sharp teeth helped it skim fish from the sea. Wing membranes in fossils reveal its flight secrets!
Scaphognathus crassirostris: "Boat jaw, thick snout"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Rhamphorhynchidae	~0.9 m wingspan, like a small hawk	Germany, ~150 Mya (Late Jurassic)	Carnivore/Piscivore	Thea’s log: Rare Solnhofen Limestone fossils show its robust jaw, perfect for snatching fish or small prey in Jurassic lagoons.
Sordes pilosus: "Hairy devil"	Order: Pterosauria, Suborder: Rhamphorhynchoidea, Family: Rhamphorhynchidae	~1 m wingspan, like a large crow	Kazakhstan, ~150 Mya (Late Jurassic)	Piscivore	Thea’s log: Karabastau Formation’s lake deposits reveal fuzzy pterosaurs! This one scooped fish with its sharp beak, a hairy marvel of the skies.
Dsungaripterus weii: "Junggar wing"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Dsungaripteridae	~3 m wingspan, like an albatross	China, ~120 Mya (Early Cretaceous)	Piscivore/Carnivore	Thea’s log: From Tugulu Group’s floodplains, its thick skull and curved beak cracked shells or caught fish. A tough flier in Asian skies!
Arthurdactylus conandoylei: "Arthur’s finger"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Pterodaustriidae	~4.6 m wingspan, like a small plane	Brazil, ~110 Mya (Early Cretaceous)	Piscivore	Thea’s log: Santana Formation’s coastal lagoons were home to this large pterosaur, diving for fish with its sharp beak. A South American sky lord!
Pterodaustro guinazui: "Southern wing"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Pterodaustriidae	~2.5 m wingspan, like a flamingo	Argentina, ~105 Mya (Early Cretaceous)	Filter-feeder	Thea’s log: Lagarcito Formation’s comb-toothed flier filter-fed like a flamingo, scooping tiny organisms from lakes. A Cretaceous marvel!
Cearadactylus atrox: "Ceará finger, fierce"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Pterodactylidae	~5 m wingspan, like a small aircraft	Brazil, ~110 Mya (Early Cretaceous)	Piscivore	Thea’s log: Santana Formation’s fierce coastal predator, its large jaws snagged fish in Cretaceous seas. A true sky hunter!
Pteranodon sternbergi: "Toothless wing"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Ornithocheiridae	~6–7 m wingspan, like a hang glider	USA, ~85 Mya (Late Cretaceous)	Piscivore	Thea’s log: Soaring over Niobrara Formation’s seas, its crest and toothless beak made it a master fish-catcher. An iconic sky lord!
Quetzalcoatlus lawsoni: "Feathered serpent god"	Order: Pterosauria, Suborder: Pterodactyloidea, Family: Ornithocheiridae	~10–17 m wingspan, like a small plane	USA, ~70 Mya (Late Cretaceous)	Carnivore/Scavenger	Thea’s log: Javelina Formation’s giant, one of the largest fliers ever, stalked prey or scavenged on land. Ruler of Late Cretaceous skies!
Theropoda – The Predatory Elite
Coelophysis bauri: "Hollow form"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Podokesauridae	~3 m long, like a small car	USA, ~210 Mya (Late Triassic)	Carnivore	Thea’s log: Chinle Formation’s nimble predator hunted small animals with sharp teeth and speedy legs. A Triassic trailblazer!
Procompsognathus triassicus: "Before elegant jaw"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Podokesauridae	~1 m long, like a large dog	Germany, ~210 Mya (Late Triassic)	Carnivore	Thea’s log: Löwenstein Formation’s speedy hunter chased lizards and insects in Triassic forests. A tiny terror!
Saltopus elginensis: "Hopping foot"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Podokesauridae	~0.6 m long, like a small cat	Scotland, ~230 Mya (Late Triassic)	Carnivore	Thea’s log: Lossiemouth Sandstone’s lightweight predator zipped after insects in arid landscapes. A hopping hunter!
Coelurus fragilis: "Hollow tail"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Coeluridae	~2 m long, like a motorcycle	USA, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Morrison Formation’s slender predator hunted small prey with hollow bones for speed. A Jurassic sprinter!
Moros intrepidus: "Doom, fearless"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Coeluridae	~1.8 m long, like a large dog	USA, ~96 Mya (Early Cretaceous)	Carnivore	Thea’s log: Cedar Mountain Formation’s bold hunter, bridging early and advanced coelurosaurs. Fearless indeed!
Compsognathus longipes: "Elegant jaw"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Compsognathidae	~1.4 m long, like a large turkey	Germany, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Solnhofen Limestone’s petite predator ate lizards, with fossils showing gut contents. A dainty Jurassic hunter!
Sinosauropteryx lingyuanensis: "Chinese lizard wing"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Compsognathidae	~1 m long, like a small dog	China, ~125 Mya (Early Cretaceous)	Carnivore	Thea’s log: Yixian Formation’s feathered dinosaur, a key bird link, hunted in lake-filled forests. A feathery find!
Dromiceiomimus samueli: "Emu mimic"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Ornithomimidae	~3.5 m long, like a small car	Canada, ~75 Mya (Late Cretaceous)	Omnivore	Thea’s log: Dinosaur Park Formation’s ostrich-like sprinter ate plants and small animals in floodplains. Speedy and versatile!
Gallimimus bullatus: "Chicken mimic"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Ornithomimidae	~6 m long, like a pickup truck	Mongolia, ~70 Mya (Late Cretaceous)	Omnivore	Thea’s log: Nemegt Formation’s long-necked runner foraged in river systems. A Cretaceous speedster!
Ornithomimus velox: "Bird mimic, swift"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Ornithomimidae	~3.8 m long, like a small car	USA, ~75 Mya (Late Cretaceous)	Omnivore	Thea’s log: Denver Formation’s fast runner ate plants and insects in plains. A swift bird mimic!
Struthiomimus altus: "Ostrich mimic, tall"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Ornithomimidae	~4 m long, like a small van	Canada, ~75 Mya (Late Cretaceous)	Omnivore	Thea’s log: Dinosaur Park Formation’s long-legged dinosaur fed opportunistically in floodplains. Tall and fast!
Deinocheirus mirificus: "Terrible hand"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Family: Deinocheiridae	~11.5 m long, like a school bus	Mongolia, ~70 Mya (Late Cretaceous)	Omnivore	Thea’s log: Nemegt Formation’s bizarre, hump-backed giant with huge arms ate plants and fish. A strange discovery!
Oviraptor philoceratops: "Egg thief, horn lover"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Oviraptoridae	~2 m long, like a large dog	Mongolia, ~75 Mya (Late Cretaceous)	Omnivore	Thea’s log: Djadochta Formation’s beaked dinosaur, wrongly called an egg thief, ate plants and small prey. A misunderstood marvel!
Therizinosaurus cheloniformis: "Scythe lizard, turtle form"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Therizinosauridae	~10 m long, like a school bus	Mongolia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Nemegt Formation’s odd theropod with massive claws pulled down vegetation. A plant-eating predator!
Stenonychosaurus inequalis: "Narrow claw lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Saurornithoididae	~2 m long, like a large dog	Canada, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Dinosaur Park Formation’s brainy predator hunted with sharp claws and keen senses. A smart stalker!
Troodon formosus: "Wounding tooth"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Saurornithoididae	~2.4 m long, like a small car	USA, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Two Medicine Formation’s smart, possibly nocturnal hunter preyed on small animals. A clever Cretaceous carnivore!
Bambiraptor feinbergi: "Bambi thief"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Dromaeosauridae	~1 m long, like a small dog	USA, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Two Medicine Formation’s feathered raptor, named for its small size, hunted with deadly precision. A tiny terror!
Deinonychus antirrhopus: "Terrible claw"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Dromaeosauridae	~3.4 m long, like a small car	USA, ~110 Mya (Early Cretaceous)	Carnivore	Thea’s log: Cloverly Formation’s pack hunter used sickle-shaped claws to tackle larger prey. A fierce team player!
Dromaeosaurus albertensis: "Running lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Dromaeosauridae	~2 m long, like a large dog	Canada, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Dinosaur Park Formation’s raptor had strong jaws for biting small dinosaurs. A swift predator!
Saurornitholestes sullivani: "Lizard-bird thief"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Dromaeosauridae	~1.8 m long, like a large dog	USA, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Two Medicine Formation’s feathered raptor hunted small prey, a bird-like hunter!
Velociraptor osmolskae: "Swift thief"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Dromaeosauridae	~2 m long, like a large dog	Mongolia, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Djadochta Formation’s desert dunes hosted this feathered predator, famous for its speed and sickle claws. A star hunter!
Archaeopteryx albersdoerferi: "Ancient wing"	Order: Saurischia, Suborder: Theropoda, Infraorder: Coelurosauria, Maniraptoria, Family: Archaeopterygidae	~0.5 m long, like a small bird	Germany, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Solnhofen Limestone’s feathered fossils link dinosaurs to birds. It hunted insects in lagoon settings. A key discovery!
Ceratosaurus nasicornis: "Horned lizard, nose horn"	Order: Saurischia, Suborder: Theropoda, Infraorder: Ceratosauria, Family: Ceratosauridae	~6 m long, like a small bus	USA, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Morrison Formation’s horned predator hunted with blade-like teeth in floodplains. A fierce Jurassic hunter!
Dilophosaurus wetherilli: "Two-crested lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Ceratosauria, Family: Ceratosauridae	~7 m long, like a small bus	USA, ~190 Mya (Early Jurassic)	Carnivore	Thea’s log: Kayenta Formation’s crested hunter preyed on smaller dinosaurs by ancient rivers. A flashy predator!
Elaphrosaurus bambergi: "Lightweight lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Ceratosauria, Family: Ceratosauridae	~6 m long, like a small bus	Tanzania, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Tendaguru Formation’s slender, fast predator chased smaller prey in African plains. A speedy hunter!
Eustreptospondylus oxoniensis: "Well-curved vertebra"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Megalosauridae	~7 m long, like a small bus	England, ~160 Mya (Late Jurassic)	Carnivore	Thea’s log: Oxford Clay’s coastal predator tackled large prey near Jurassic shores. A powerful hunter!
Giganotosaurus carolinii: "Giant southern lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Megalosauridae	~12–13 m long, like a large bus	Argentina, ~100 Mya (Early Cretaceous)	Carnivore	Thea’s log: Candeleros Formation’s massive predator, rivaling T. rex, hunted sauropods in South America. A colossal carnivore!
Poekilopleuron bucklandii: "Varied rib"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Megalosauridae	~7 m long, like a small bus	France, ~165 Mya (Middle Jurassic)	Carnivore	Thea’s log: Calcaire de Caen’s predator used strong jaws to take down prey in European forests. A Jurassic giant!
Proceratosaurus bradleyi: "Before horn lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Megalosauridae	~3 m long, like a small car	England, ~165 Mya (Middle Jurassic)	Carnivore	Thea’s log: Great Oolite Group’s early tyrannosaur relative hunted small dinosaurs. A cunning predator!
Allosaurus europaeus: "Different lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Allosauridae	~12 m long, like a large van	Portugal, USA, ~150 Mya (Late Jurassic)	Carnivore	Thea’s log: Lourinhã, Morrison Formation’s top predator hunted sauropods with powerful bites in floodplains. A Jurassic titan!
Yangchuanosaurus zigongensis: "Yangchuan lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Allosauridae	~8 m long, like a large van	China, ~160 Mya (Late Jurassic)	Carnivore	Thea’s log: Shaximiao Formation’s Asian predator, like Allosaurus, hunted in forested floodplains. A fierce hunter!
Acrocanthosaurus atokensis: "High-spined lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Spinosauridae	~11 m long, like a school bus	USA, ~110 Mya (Early Cretaceous)	Carnivore	Thea’s log: Antlers Formation’s sail-backed predator hunted large dinosaurs in North American plains. A towering terror!
Spinosaurus aegyptiacus: "Spine lizard, Egyptian"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Spinosauridae	~14–18 m long, like a double-decker bus	Egypt, Morocco, ~95 Mya (Late Cretaceous)	Carnivore/Piscivore	Thea’s log: Kem Kem Beds’ sail-backed giant fished and hunted in river systems. A prehistoric powerhouse!
Albertosaurus sarcophagus: "Alberta lizard, flesh-eater"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Tyrannosauridae	~9 m long, like a large van	Canada, ~70 Mya (Late Cretaceous)	Carnivore	Thea’s log: Horseshoe Canyon Formation’s T. rex cousin hunted hadrosaurs in floodplains. A fierce predator!
Alioramus altai: "Different branch"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Tyrannosauridae	~6 m long, like a small bus	Mongolia, ~70 Mya (Late Cretaceous)	Carnivore	Thea’s log: Nemegt Formation’s slender tyrannosaur hunted in Asian river systems. A unique hunter!
Daspletosaurus horneri: "Frightful lizard"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Tyrannosauridae	~9 m long, like a large van	USA, ~75 Mya (Late Cretaceous)	Carnivore	Thea’s log: Two Medicine Formation’s robust predator took on large herbivores. A fearsome beast!
Tarbosaurus bataar: "Alarming lizard, hero"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Tyrannosauridae	~10 m long, like a school bus	Mongolia, ~70 Mya (Late Cretaceous)	Carnivore	Thea’s log: Nemegt Formation’s Asian T. rex relative dominated river ecosystems. A mighty hunter!
Tyrannosaurus rex: "Tyrant lizard king"	Order: Saurischia, Suborder: Theropoda, Infraorder: Carnosauria, Family: Tyrannosauridae	~12–13 m long, like a large bus	USA, ~68 Mya (Late Cretaceous)	Carnivore	Thea’s log: Hell Creek Formation’s apex predator crushed bones with massive jaws. The king of dinosaurs!
Sauropodomorpha – The Gentle Giants
Herrerasaurus ischigualastensis: "Herrera’s lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Herrerasauridae	~4–6 m long, like a small bus	Argentina, ~230 Mya (Late Triassic)	Carnivore	Thea’s log: Ischigualasto Formation’s early dinosaur hunted smaller reptiles in arid plains. A Triassic pioneer!
Sanjuansaurus gordilloi: "San Juan lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Herrerasauridae	~3 m long, like a small car	Argentina, ~230 Mya (Late Triassic)	Carnivore	Thea’s log: Ischigualasto Formation’s smaller predator chased prey in Triassic landscapes. A swift hunter!
Smurfette (Smurfs (2025)): "Little blue female" (Fictional)	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Herrerasauridae	~0.19 m (7.5 inches), like a small doll (Fictional)	Belgium (Fictional), 2025 (Modern)	Omnivore (Fictional)	Thea’s log: Not a dinosaur! This Smurfs 2025 movie character, voiced by Rihanna, leads a magical adventure to rescue Papa Smurf. A modern mystery in our dino files!
Staurikosaurus pricei: "Southern cross lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Herrerasauridae	~2 m long, like a large dog	Brazil, ~230 Mya (Late Triassic)	Carnivore	Thea’s log: Santa Maria Formation’s early predator hunted small animals in Triassic forests. A southern star!
Anchisaurus polyzelus: "Near lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Anchisauridae	~2 m long, like a large dog	USA, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Portland Formation’s small plant-eater, an early sauropodomorph grazed North America. A gentle pioneer!
Efraasia minor: "Efraasia, small"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Anchisauridae	~2.5 m long, like a small car	Germany, ~210 Mya (Late Triassic)	Herbivore	Thea’s log: Löwenstein Formation’s early herbivore munched low vegetation in Triassic forests. A tiny titan!
Eoraptor lunensis: "Dawn thief"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Anchisauridae	~1 m long, like a small dog	Argentina, ~230 Mya (Late Triassic)	Omnivore	Thea’s log: Ischigualasto Formation’s primitive dinosaur ate plants and small animals. An ancient adventurer!
Thecodontosaurus antiquus: "Socket-toothed lizard, ancient"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Anchisauridae	~2.5 m long, like a small car	England, ~210 Mya (Late Triassic)	Herbivore	Thea’s log: Magnesian Conglomerate’s early plant-eater grazed Triassic woodlands. A prehistoric forager!
Massospondylus kaalae: "Longer vertebra"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Plateosauridae	~4–6 m long, like a small bus	South Africa, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Elliot Formation’s plant-eater roamed Jurassic plains, possibly rearing young in nests. A caring giant!
Mussaurus patagonicus: "Mouse lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Plateosauridae	~3 m long (juvenile), like a small car	Argentina, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Laguna Colorada Formation’s juvenile fossils suggest larger adults grazed South America. A growing giant!
Plateosaurus gracilis: "Broad lizard, slender"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Plateosauridae	~5–8 m long, like a large van	Germany, ~210 Mya (Late Triassic)	Herbivore	Thea’s log: Löwenstein Formation’s common plant-eater browsed high vegetation with its long neck. A Triassic titan!
Riojasaurus incertus: "Rioja lizard, uncertain"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Prosauropoda, Family: Melanorosauridae	~10 m long, like a school bus	Argentina, ~210 Mya (Late Triassic)	Herbivore	Thea’s log: Los Colorados Formation’s large herbivore, a step toward giant sauropods. A massive muncher!
Barapasaurus tagorei: "Big-legged lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Cetiosauridae	~14 m long, like a large bus	India, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Kota Formation’s early sauropod grazed high trees in Jurassic Asia. A towering plant-eater!
Cetiosaurus oxoniensis: "Whale lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Cetiosauridae	~16 m long, like a double-decker bus	England, ~165 Mya (Middle Jurassic)	Herbivore	Thea’s log: Oxford Clay’s massive plant-eater roamed Jurassic Europe, feasting on ferns. A gentle giant!
Brachiosaurus altithorax: "Arm lizard, high chest"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Brachiosauridae	~25 m long, like a train carriage	USA, India, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison, Kota Formation’s towering giant reached treetops with its long neck. A skyscraping sauropod!
Sauroposeidon proteles: "Earthquake lizard, perfect"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Brachiosauridae	~28 m long, like a blue whale	USA, ~110 Mya (Early Cretaceous)	Herbivore	Thea’s log: Antlers Formation’s colossal sauropod browsed high vegetation. An earth-shaking giant!
Camarasaurus supremus: "Chambered lizard, supreme"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Camarasauridae	~18 m long, like a large bus	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s common sauropod chewed tough plants with its boxy skull. A sturdy giant!
Euhelopus zdanskyi: "Good marsh foot"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Camarasauridae	~15 m long, like a double-decker bus	China, ~120 Mya (Early Cretaceous)	Herbivore	Thea’s log: Mengyin Formation’s plant-eater thrived in Asian wetlands. A marsh-loving muncher!
Opisthocoelicaudia skarzynskii: "Rear hollow tail"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Camarasauridae	~12 m long, like a large van	Mongolia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Nemegt Formation’s sauropod grazed in river systems with a unique tail structure. A mysterious giant!
Apatosaurus ajax: "Deceptive lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Diplodocidae	~22 m long, like a train carriage	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s whip-tailed giant grazed floodplains with its long neck. A deceptive giant!
Dicraeosaurus sattleri: "Forked lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Diplodocidae	~12 m long, like a large van	Tanzania, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Tendaguru Formation’s smaller sauropod fed on low plants in African plains. A compact giant!
Diplodocus hallorum: "Double beam"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Diplodocidae	~29.5 m long, like a train carriage	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s long-tailed sauropod may have used its whip-like tail as a weapon. A lengthy legend!
Mamenchisaurus sinocanadorum: "Mamenchi lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Diplodocidae	~26 m long, like a blue whale	China, ~160 Mya (Late Jurassic)	Herbivore	Thea’s log: Shaximiao Formation’s long-necked giant reached high trees in Asian forests. A towering titan!
Supersaurus vivianae: "Super lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Diplodocidae	~34 m long, like a train	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s enormous sauropod, one of the longest dinosaurs known. A super-sized star!
Alamosaurus sanjuanensis: "Alamo lizard"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Titanosauridae	~20 m long, like a large bus	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Javelina Formation’s massive titanosaur roamed North American plains. A colossal grazer!
Dreadnoughtus schrani: "Fears nothing"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Titanosauridae	~26 m long, like a blue whale	Argentina, ~80 Mya (Late Cretaceous)	Herbivore	Thea’s log: Cerro Fortaleza Formation’s giant, one of the heaviest dinosaurs, grazed South America. A fearless feeder!
Saltasaurus loricatus: "Salta lizard, armored"	Order: Saurischia, Suborder: Sauropodomorpha, Infraorder: Sauropoda, Family: Titanosauridae	~12 m long, like a large van	Argentina, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Lecho Formation’s armored titanosaur, its bony plates offered protection. A shielded giant!
Cerapoda – Beaked, Horned, and Armored
Lesothosaurus diagnosticus: "Lesotho lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Fabrosauridae	~1 m long, like a small dog	Lesotho, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Elliot Formation’s small, agile plant-eater darted through African forests. A speedy grazer!
Scutellosaurus lawleri: "Little shield lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Fabrosauridae	~1.2 m long, like a large dog	USA, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Kayenta Formation’s armored ornithopod had bony plates for early defense. A shielded sprinter!
Echinodon becklesii: "Spiny tooth"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Heterodontosauridae	~0.6 m long, like a small cat	England, ~140 Mya (Early Cretaceous)	Herbivore	Thea’s log: Purbeck Group’s tiny plant-eater, its varied teeth suggest a mixed diet. A spiky surprise!
Heterodontosaurus tucki: "Different-toothed lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Heterodontosauridae	~1.2 m long, like a large dog	South Africa, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Elliot Formation’s small dinosaur, its tusks may have been for display or defense. A toothy treasure!
Pisanosaurus mertii: "Pisano’s lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Heterodontosauridae	~1 m long, like a small dog	Argentina, ~230 Mya (Late Triassic)	Herbivore	Thea’s log: Ischigualasto Formation’s early ornithischian grazed in Triassic plains. An ancient herbivore!
Callovosaurus leedsi: "Callovian lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~2.5 m long, like a small car	England, ~165 Mya (Middle Jurassic)	Herbivore	Thea’s log: Oxford Clay’s fast plant-eater roamed European forests. A Jurassic jogger!
Dryosaurus elderae: "Oak lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~3 m long, like a small car	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s agile herbivore fled predators in floodplains. A speedy plant-eater!
Hypsilophodon foxii: "High-ridge tooth"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~2 m long, like a large dog	England, ~125 Mya (Early Cretaceous)	Herbivore	Thea’s log: Wessex Formation’s speedy plant-eater darted through Cretaceous forests. A nimble nibbler!
Nanosaurus agilis: "Dwarf lizard, agile"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~2 m long, like a large dog	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s small herbivore grazed in North American plains. A tiny trailblazer!
Parksosaurus warreni: "Park’s lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~2.5 m long, like a small car	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s fast runner fed in Late Cretaceous floodplains. A speedy survivor!
Thescelosaurus garbanii: "Marvelous lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hypsilophodontidae	~3.5 m long, like a small car	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s sturdy plant-eater thrived in diverse ecosystems. A marvelous muncher!
Camptosaurus dispar: "Flexible lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~6 m long, like a small bus	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s early iguanodont grazed floodplains with strong jaws. A flexible feeder!
Iguanodon bernissartensis: "Iguana tooth"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~12 m long, like a large van	Belgium, ~125 Mya (Early Cretaceous)	Herbivore	Thea’s log: Wealden Group’s large plant-eater, its thumb spikes may have been for defense. A spiky giant!
Mantellisaurus atherfieldensis: "Mantell’s lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~7 m long, like a small bus	England, ~125 Mya (Early Cretaceous)	Herbivore	Thea’s log: Wealden Group’s agile herbivore roamed European forests. A nimble grazer!
Muttaburrasaurus langdoni: "Muttaburra lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~8 m long, like a large van	Australia, ~100 Mya (Early Cretaceous)	Herbivore	Thea’s log: Allaru Mudstone’s plant-eater may have had a nasal crest for calls. A vocal veggie-eater!
Ouranosaurus nigeriensis: "Brave lizard, Niger"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~8 m long, like a large van	Niger, ~110 Mya (Early Cretaceous)	Herbivore	Thea’s log: Elrhaz Formation’s sail-backed herbivore grazed in African river systems. A bold browser!
Probactrosaurus gobiensis: "Before horned lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~6 m long, like a small bus	China, ~100 Mya (Early Cretaceous)	Herbivore	Thea’s log: Dashuigou Formation’s early hadrosaur relative fed in Asian plains. A prehistoric pioneer!
Tenontosaurus dossi: "Sinew lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Iguanodontidae	~7 m long, like a small bus	USA, ~110 Mya (Early Cretaceous)	Herbivore	Thea’s log: Cloverly Formation’s sturdy plant-eater, often prey for Deinonychus. A tough grazer!
Bactrosaurus johnsoni: "Club lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~6 m long, like a small bus	China, ~95 Mya (Late Cretaceous)	Herbivore	Thea’s log: Iren Dabasu Formation’s early hadrosaur grazed Asian plains. A duck-billed delight!
Edmontosaurus regalis: "Edmonton lizard, royal"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~9 m long, like a large van	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s duck-billed dinosaur grazed in herds. A royal roamer!
Hadrosaurus foulkii: "Bulky lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~8 m long, like a large van	USA, ~80 Mya (Late Cretaceous)	Herbivore	Thea’s log: Woodbury Formation’s early hadrosaur fed in coastal plains. A bulky browser!
Kritosaurus navajovius: "Separated lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~9 m long, like a large van	USA, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Kirtland Formation’s duck-bill grazed North American plains. A herd hero!
Maiasaura peeblesorum: "Good mother lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~9 m long, like a large van	USA, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Two Medicine Formation’s nurturing hadrosaur cared for young in nests. A loving legend!
Prosaurolophus maximus: "Before crested lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~9 m long, like a large van	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s duck-bill lived in large herds. A social superstar!
Saurolophus osborni: "Crested lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~9 m long, like a large van	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s crested hadrosaur grazed in floodplains. A crested champion!
Shantungosaurus giganteus: "Shandong lizard, giant"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Saurolophinae)	~15 m long, like a double-decker bus	China, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Xingezhuang Formation’s massive hadrosaur, one of the largest duck-bills. A giant grazer!
Corythosaurus casuarius: "Helmet lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~9 m long, like a large van	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s crested hadrosaur, its crest may have amplified calls. A vocal virtuoso!
Hypacrosaurus stebingeri: "Near highest lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~9 m long, like a large van	USA, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Two Medicine Formation’s crested hadrosaur lived in North American plains. A high-flying herbivore!
Lambeosaurus magnicristatus: "Lambe’s lizard, large crest"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~9 m long, like a large van	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s crested hadrosaur, its large crest was for display. A flashy feeder!
Olorotitan arharensis: "Swan giant"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~8 m long, like a large van	Russia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Udurchukan Formation’s crested hadrosaur grazed in Asian plains. A graceful giant!
Parasaurolophus walkeri: "Near crested lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~10.3 m long, like a large van	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s tube-crested hadrosaur produced loud calls. A musical marvel!
Tsintaosaurus spinorhinus: "Qingdao lizard, spine nose"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ornithopoda, Family: Hadrosauridae (Lambeosaurinae)	~8 m long, like a large van	China, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Jingangkou Formation’s crested hadrosaur thrived in Asian ecosystems. A spiky singer!
Homalocephale calathocercos: "Level head, horned tail"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Pachycephalosauridae	~2 m long, like a large dog	Mongolia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Nemegt Formation’s dome-headed dinosaur may have head-butted rivals. A tough competitor!
Pachycephalosaurus wyomingensis: "Thick-headed lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Pachycephalosauridae	~4.5 m long, like a small car	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s thick-skulled dinosaur likely used its dome for combat. A headstrong herbivore!
Prenocephale prenes: "Sloping head"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Pachycephalosauridae	~2 m long, like a large dog	Mongolia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Nemegt Formation’s dome-headed dinosaur roamed Asian river systems. A sloped-skull star!
Stegoceras validum: "Roof horn, strong"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Pachycephalosauridae	~2 m long, like a large dog	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s small pachycephalosaur likely head-butted competitors. A sturdy striker!
Psittacosaurus meileyingensis: "Parrot lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Psittacosauridae	~2 m long, like a large dog	China, ~120 Mya (Early Cretaceous)	Herbivore	Thea’s log: Yixian Formation’s beaked dinosaur munched plants with parrot-like jaws. A feathered friend!
Bagaceratops rozhdestvenskyi: "Small horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Protoceratopidae	~1.8 m long, like a large dog	Mongolia, ~80 Mya (Late Cretaceous)	Herbivore	Thea’s log: Barun Goyot Formation’s small ceratopsian grazed in desert environments. A tiny titan!
Leptoceratops gracilis: "Slender horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Protoceratopidae	~2 m long, like a large dog	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s small ceratopsian fed in North American plains. A slender survivor!
Microceratus gobiensis: "Tiny horned"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Protoceratopidae	~0.6 m long, like a small cat	Mongolia, ~80 Mya (Late Cretaceous)	Herbivore	Thea’s log: Minhe Formation’s tiny ceratopsian darted through Asian plains. A pint-sized plant-eater!
Montanoceratops cerorhynchus: "Montana horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Protoceratopidae	~2.5 m long, like a small car	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: St. Mary River Formation’s small ceratopsian grazed in North America. A mountain muncher!
Protoceratops hellenikorhinus: "First horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Protoceratopidae	~2 m long, like a large dog	Mongolia, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Djadochta Formation’s early ceratopsian lived in desert ecosystems. A prehistoric pioneer!
Anchiceratops ornatus: "Near horned face, ornate"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~5 m long, like a small car	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s frilled ceratopsian, its horns were for display. An ornate herbivore!
Arrhinoceratops brachyops: "No nose horn face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~6 m long, like a small bus	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s frilled ceratopsian grazed in floodplains. A hornless hero!
Chasmosaurus belli: "Opening lizard, beautiful"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~5 m long, like a small car	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s large-frilled ceratopsian used its frill for display. A beautiful beast!
Pentaceratops sternbergii: "Five-horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~6 m long, like a small bus	USA, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Kirtland Formation’s ornate ceratopsian, its large frill was for show. A five-horned marvel!
Torosaurus latus: "Perforated lizard, wide"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~8 m long, like a large van	USA, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s huge-frilled ceratopsian grazed North American plains. A wide-ranging warrior!
Triceratops horridus: "Three-horned face, rough"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (long-frilled)	~9 m long, like a large van	USA, ~68 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s iconic ceratopsian fended off T. rex with horns and frill. A three-horned titan!
Centrosaurus apertus: "Pointed lizard, open"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (short-frilled)	~6 m long, like a small bus	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s horned dinosaur lived in herds with a nasal horn. A pointed protector!
Nasutoceratops titusi: "Big-nosed horned face"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (short-frilled)	~5 m long, like a small car	USA, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Kaiparowits Formation’s unique ceratopsian, its bull-like horns were distinctive. A big-nosed battler!
Pachyrhinosaurus lakustai: "Thick-nosed lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (short-frilled)	~6 m long, like a small bus	Canada, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Horseshoe Canyon Formation’s boss-nosed ceratopsian grazed in herds. A thick-nosed titan!
Styracosaurus ovatus: "Spiked lizard"	Order: Ornithischia, Suborder: Cerapoda, Infraorder: Ceratopia, Family: Ceratopidae (short-frilled)	~5 m long, like a small car	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s spiky-frilled ceratopsian, its horns were for display. A spiky spectacle!
Thyreophora – The Armored Tanks
Huayangosaurus taibaii: "Huayang lizard"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Stegosauria, Family: Huayangosauridae	~4 m long, like a small car	China, ~165 Mya (Middle Jurassic)	Herbivore	Thea’s log: Shaximiao Formation’s early stegosaur, its plates and spikes offered defense. An armored adventurer!
Tuojiangosaurus multispinus: "Tuo River lizard, many spines"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Stegosauria, Family: Huayangosauridae	~7 m long, like a small bus	China, ~160 Mya (Late Jurassic)	Herbivore	Thea’s log: Shaximiao Formation’s plated dinosaur grazed Asian forests with tail spikes. A spiny survivor!
Kentrosaurus aethiopicus: "Spiked lizard, African"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Stegosauria, Family: Stegosauridae	~4.5 m long, like a small car	Tanzania, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Tendaguru Formation’s spiky stegosaur defended itself with tail spikes. An African armored star!
Stegosaurus stenops: "Roof lizard, narrow"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Stegosauria, Family: Stegosauridae	~9.6 m long, like a large van	USA, ~150 Mya (Late Jurassic)	Herbivore	Thea’s log: Morrison Formation’s iconic stegosaur, its plates may have been for display. A plated powerhouse!
Wuerhosaurus ordosensis: "Wuerho lizard"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Stegosauria, Family: Stegosauridae	~7 m long, like a small bus	China, ~120 Mya (Early Cretaceous)	Herbivore	Thea’s log: Ejinhoro Formation’s late stegosaur grazed in Asian plains. A lasting legend!
Scelidosaurus harrisonii: "Limb lizard"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Scelidosauridae	~4 m long, like a small car	England, ~190 Mya (Early Jurassic)	Herbivore	Thea’s log: Charmouth Mudstone’s early armored dinosaur had bony scutes for protection. An early tank!
Hylaeosaurus armatus: "Forest lizard, armored"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~5 m long, like a small car	England, ~130 Mya (Early Cretaceous)	Herbivore	Thea’s log: Wealden Group’s armored dinosaur grazed in European forests. A forest fortress!
Nodosaurus textilis: "Knobbed lizard"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~6 m long, like a small bus	USA, ~80 Mya (Late Cretaceous)	Herbivore	Thea’s log: Frontier Formation’s nodosaur, its armor protected it from predators. A knobbed knight!
Panoplosaurus mirus: "Fully armored lizard, wonderful"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~5 m long, like a small car	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s heavily armored nodosaur grazed in floodplains. A wonderful warrior!
Polacanthus foxii: "Many spines"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~5 m long, like a small car	England, ~125 Mya (Early Cretaceous)	Herbivore	Thea’s log: Wessex Formation’s spiky nodosaur defended itself in European forests. A spiny sentinel!
Sauropelta edwardsorum: "Lizard shield"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~5 m long, like a small car	USA, ~110 Mya (Early Cretaceous)	Herbivore	Thea’s log: Cloverly Formation’s armored nodosaur grazed in North American plains. A shielded survivor!
Silvisaurus condrayi: "Forest lizard"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~4 m long, like a small car	USA, ~100 Mya (Early Cretaceous)	Herbivore	Thea’s log: Dakota Formation’s armored dinosaur lived in forested plains. A forest fortress!
Struthiosaurus transylvanicus: "Ostrich lizard, Transylvanian"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Nodosauridae	~4 m long, like a small car	Romania, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Sânpetru Formation’s small nodosaur grazed in European islands. A Transylvanian tank!
Ankylosaurus magniventris: "Fused lizard, large belly"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Ankylosauridae	~6–11 m long, like a large van	USA, ~68 Mya (Late Cretaceous)	Herbivore	Thea’s log: Hell Creek Formation’s tank-like dinosaur, its tail club smashed predators. An armored avenger!
Euoplocephalus tutus: "Well-armored head"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Ankylosauridae	~6 m long, like a small bus	Canada, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Dinosaur Park Formation’s armored giant used its club for defense. A headstrong hero!
Saichania chulsanensis: "Beautiful one"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Ankylosauridae	~6 m long, like a small bus	Mongolia, ~70 Mya (Late Cretaceous)	Herbivore	Thea’s log: Barun Goyot Formation’s desert-dwelling ankylosaur, heavily armored. A beautiful battler!
Talarurus plicatospineus: "Basket tail, folded spine"	Order: Ornithischia, Suborder: Thyreophora, Infraorder: Ankylosauria, Family: Ankylosauridae	~5 m long, like a small car	Mongolia, ~75 Mya (Late Cretaceous)	Herbivore	Thea’s log: Bayan Shireh Formation’s armored dinosaur, its tail club was a weapon. A spiky superstar!

MESOZOIC LORDS – THE COMPLETE CLADOGRAM

(One line per species · 100 % copy-paste ready)

ORDER PTEROSAURIA (Pterosaurs)

└─ Suborder Rhamphorhynchoidea

├─ Dimorphodontidae · Dimorphodon macronyx

├─ Eudimorphodontidae · Eudimorphodon ranzii

└─ Rhamphorhynchidae

├─ Anurognathus ammoni

├─ Rhamphorhynchus etches

├─ Scaphognathus crassirostris

└─ Sordes pilosus

└─ Suborder Pterodactyloidea

├─ Dsungaripteridae · Dsungaripterus weii

├─ Pterodaustriidae · Pterodaustro guinazui

├─ Pterodactylidae

├─ Arthurdactylus conandoylei

└─ Cearadactylus atrox

└─ Ornithocheiridae

├─ Pteranodon sternbergi

└─ Quetzalcoatlus lawsoni

Genus List for Holtz (2026): Pterosaurs (Flying Reptiles)

Genus & Species	Name Meaning	Age	Time	Diet	Height / Standing	Wingspan	Weight	Author	Region / Formation	Cartoon All-Stars's Comments/Facts
SUBORDER RHAMPHORHYNCHOIDEA
Dimorphodon macronyx	"Two-form tooth"	195 Ma	Early Jurassic	Carnivore / Insectivore	0.3 m	1.4 m	2 kg	Owen (1859)	UK (Blue Lias Fm)	Daffy Duck: "A massive puffin-head stuck on a lizard body! Two different kinds of teeth in one mouth? It's downright chaotic! It's despicable!"
Eudimorphodon ranzii	"True two-form tooth"	210 Ma	Late Triassic	Piscivore	0.2 m	1.0 m	1 kg	Zambelli (1973)	Italy (Zorzino Limestone)	Brainy Smurf: "One of the oldest known flying reptiles. Statistically, its complex multi-cusped teeth prove that early pterosaurs were highly specialized fish-eaters!"
Anurognathus ammoni	"Without tail jaw"	150 Ma	Late Jurassic	Insectivore	0.05 m	0.5 m	0.04 kg	Döderlein (1923)	Germany (Solnhofen)	Michelangelo: "Whoa, this little dude looks like a flying frog! No tail, giant eyes, and a massive mouth for catching bugs on the fly. Totally radical!"
Rhamphorhynchus etchesi	"Beak snout"	152 Ma	Late Jurassic	Piscivore	0.2 m	1.2 m	2 kg	O'Sullivan (2015)	UK (Kimmeridge Clay)	Bugs Bunny: "The classic long-tail flyer, doc! He’s got forward-pointing needle teeth for snagging slippery fish right out of the surf!"
Scaphognathus crassirostris	"Tub jaw"	150 Ma	Late Jurassic	Carnivore	0.3 m	0.9 m	1 kg	Wagner (1861)	Germany (Solnhofen)	Thea Stilton: "He has a much broader, blunt snout compared to his cousins. A very stylish, unique design for an early sky hunter. Fabumouse!"
Sordes pilosus	"Hairy filth"	155 Ma	Late Jurassic	Insectivore	0.15 m	0.6 m	0.2 kg	Sharov (1971)	Kazakhstan (Karatau Fm)	Papa Smurf: "Don't let the name fool you, little Smurfs! His fossil preserves thick, fuzzy 'pycnofibers' all over, proving he was warm-blooded."
SUBORDER PTERODACTYLOIDEA
Dsungaripterus weii	"Junggar wing"	120 Ma	Early Cretaceous	Durophage (Shellfish)	0.8 m	3.5 m	15 kg	Young (1964)	China (Lianmuqin Fm)	Garfield: "He’s got a curved beak like an upturned crowbar and blunt crushing teeth in the back. Perfect for opening clams... or lasagna pans."
Pterodaustro guinazui	"Southern wing"	105 Ma	Early Cretaceous	Filter-feeder	0.4 m	2.5 m	3 kg	Bonaparte (1970)	Argentina (Lagarcito Fm)	Bluey: "He’s a pink flamingo pterosaur! He has thousands of bristle-teeth to strain tiny shrimp out of the lake water, for real life!"
Tapejara wellnhoferi	"Old being"	110 Ma	Early Cretaceous	Frugivore / Omnivore	0.6 m	3.5 m	5 kg	Kellner (1989)	Brazil (Romualdo Fm)	Dawn: "Wow, look at that massive semicircular sail on his snout! It's like a giant colorful billboard flying through the tropical skies!"
Arthurdactylus conandoylei	"Arthur Conan Doyle's finger"	115 Ma	Early Cretaceous	Piscivore	0.7 m	4.6 m	12 kg	Frey (1994)	Brazil (Crato Fm)	Alvin: "Named after the guy who wrote The Lost World! He’s got ultra-long wings made for soaring over the ancient ocean for days!"
Cearadactylus atrox	"Ceará finger"	112 Ma	Early Cretaceous	Piscivore	0.6 m	4.0 m	15 kg	Leonardi (1985)	Brazil (Romualdo Fm)	Geronimo Stilton: "His jaw ends in a specialized cage of long, interlocking teeth! A truly terrifying arrangement for catching fish!"
Maaradactylus kellneri	"Maara finger"	112 Ma	Early Cretaceous	Piscivore	0.8 m	5.0 m	20 kg	Bantim (2014)	Brazil (Romualdo Fm)	Optimus Prime: "Armed with robust, rounded crests on both its upper and lower jaws, this flyer was a master of coastal aerodynamics."
Pterodactylus antiquus	"Wing finger"	150 Ma	Late Jurassic	Carnivore / Generalist	0.15 m	1.0 m	1 kg	Cuvier (1809)	Germany (Solnhofen)	Winnie the Pooh: "The very first pterosaur ever found. He is quite small, about the size of a crow, and has a very straight, pointy little beak."
Tropeognathus mesembrinus	"Keel jaw"	112 Ma	Early Cretaceous	Piscivore	1.2 m	8.2 m	40 kg	Wellnhofer (1987)	Brazil (Romualdo Fm)	Tigger: "He’s got giant circular bumpers on the tips of his snout! The bounce-iest, grandest coastal glider around! Hoo-hoo-hoo!"
Pteranodon sternbergi	"Toothless wing"	85 Ma	Late Cretaceous	Piscivore	1.8 m	6.0 m	35 kg	Udder (1971)	USA (Niobrara Fm)	Bugs Bunny: "This flavor has a huge upright crest that points forward and upward, doc! No teeth at all—just a giant, spear-like fishing beak."
Quetzalcoatlus lawsoni	"Quetzalcoatl serpent"	66 Ma	Late Cretaceous	Carnivore / Scavenger	12.2 m	24.5 m	905 kg	Lawson (1975)	USA (Javelina Fm)	Optimus Prime: "The smaller cousin of the giant Q. northropi. It hunted on the ground like a modern stork, stalking the Cretaceous plains."

Genus & Species	Name Meaning	Age / Time	Wingspan	Weight	Where Found	Comments
Eudimorphodon ranzii	“True two-form tooth” (Ranzii’s)	Late Triassic (Norian)	~3.3 ft (1 m)	Large bat–sized	Italy	One of the oldest pterosaurs; multicusped teeth for fish-eating; fang-like anterior teeth
Caelestiventus hanseni	“Heavenly wind” (Hansen’s)	Late Triassic (Norian)	~5 ft (1.5 m)	Pigeon to cat–sized	Utah, USA	Oldest well-preserved pterosaur from the Americas; desert environment; named 2018
Dimorphodon macronyx	“Two-form tooth” (large claw)	Early Jurassic (Sinemurian)	4.6–8 ft (1.4–2.5 m)	Cat to large dog–sized	England	Large head, puffed skull; deep jaw with fang-like front teeth and small rear teeth
Bergamodactylus wildi	“Bergamo finger” (Wildi’s)	Late Triassic (Norian)	~3 ft (0.9 m)	Sparrow–sized	Italy	Formerly “Eudimorphodon” cromptonellus or Carniadactylus; very long terminal wing-phalanx
Anurognathus ammoni	“Without tail jaw” (von Ammon’s)	Late Jurassic (Tithonian)	~1 ft (0.3 m)	Sparrow–sized	Germany	Frog-faced; tiny, wide mouth for catching insects in flight; short tail
Sinomacrops bondei	“Chinese big-face” (Bondei’s)	Middle–Late Jurassic (Callovian?)	~3 ft (0.9 m)	Cat–sized	Liaoning, China	Large eyes, short tail; spectacular dark soft-tissue wing membranes; named 2021
Dearc sgiathanach	“Winged reptile from Skye” (Gaelic)	Middle Jurassic (Bathonian)	~8–10 ft (2.5–3 m)	Large eagle–sized	Isle of Skye, Scotland	Largest-known Jurassic pterosaur; named 2022; juvenile specimen with 2.5–3 m wingspan
Dorygnathus banthensis	“Spear jaw” (from Banth)	Early Jurassic (Toarcian)	~3.3–5.6 ft (1–1.7 m)	Cat to large dog–sized	Germany, Luxembourg	Long, pointed snout with forward-angled teeth; common in Posidonia Shale
Rhamphorhynchus etchesi	“Beak snout” (Etches’)	Late Jurassic (Tithonian)	3–6 ft (0.9–1.8 m)	Cat to turkey–sized	England, Germany, Tanzania	Long tail with diamond-shaped vane; needle-like forward- and outward-pointing teeth
Scaphognathus crassirostris	“Boat jaw” (thick beak)	Late Jurassic (Kimmeridgian–Tithonian)	~3 ft (0.9 m)	Cat–sized	Germany	Short tail, robust skull; vertical teeth for catching fish

Genus & Species	Name Meaning	Age / Time	Wingspan	Weight	Where Found	Comments
Ctenochasma taqueti	“Comb jaw” (Taquet’s)	Late Jurassic (Tithonian)	1.6–3.3 ft (0.5–1 m)	Pigeon to cat-sized	Germany, France	Hundreds of needle-like teeth formed a straining basket for small aquatic prey
Liaodactylus primus	“Liaoning finger” (first)	Late Jurassic (Oxfordian)	~2.6 ft (0.8 m)	Cat-sized	Liaoning, China	Very long skull; dense covering of pycnofibres; named 2017
Tacuadactylus luciae	“Tacua finger” (Lucia’s)	Late Jurassic (Tithonian)	~1.3 ft (0.4 m)	Sparrow-sized	Argentina	Tiny ctenochasmatid; named 2022; one of the smallest known pterosaurs
Istiodactylus sinensis	“Sail finger” (Chinese)	Early Cretaceous (Barremian)	~16 ft (5 m)	Large dog to wolf-sized	Liaoning, China	Triangular teeth with serrated edges for scavenging; formerly “Lonchodectes”
Nurhachius luei	“Nurhaci (Manchu emperor) finger” (Lü’s)	Early Cretaceous (Aptian)	~8–10 ft (2.5–3 m)	Eagle-sized	Liaoning, China	Long, pointed crest on snout; close relative of Istiodactylus
Anhanguera blittersdorffi	“Old devil” (Blittersdorff’s)	Early Cretaceous (Albian)	13–20 ft (4–6 m)	Large dog to bear-sized	Brazil	Large rounded crest on tip of jaws; one of the most common Brazilian pterosaurs
Cearadactylus atrox	“Ceará finger” (fierce)	Early Cretaceous (Albian)	~13–18 ft (4–5.5 m)	Bear-sized	Brazil	Huge jaws (over 2 ft long); originally mis-reconstructed with two teeth sticking out
Maaradactylus spielbergi	“Maara finger” (Spielberg’s)	Early Cretaceous (Aptian)	~20 ft (6 m)	Bear-sized	Brazil	Formerly “Anhanguera spielbergi”; large rounded crests on both upper and lower jaws
Ornithocheirus simus	“Bird hand” (ape-like)	Early Cretaceous (Albian)	10–20 ft (3–6 m)	Dog to bear-sized	England, Brazil	Once a wastebasket taxon; now restricted to the original Cambridge Greensand specimen
Tropeognathus mesembrinus	“Keel jaw” (southern)	Early Cretaceous (Albian)	~20–27 ft (6–8.3 m)	Bear to rhino-sized	Brazil	Largest known toothed pterosaur; huge opposing crests on tip of jaws; featured in “Walking with Dinosaurs”
Tapejara wellnhoferi	“Old being” (Wellnhofer’s)	Early Cretaceous (Aptian)	8–13 ft (2.5–4 m)	Large dog-sized	Brazil	Gigantic semicircular crest; spectacular soft-tissue crest preserved in some specimens
Barbaridactylus grandis	“Barbary finger” (great)	Late Cretaceous (Maastrichtian)	~13–16 ft (4–5 m)	Bear-sized	Morocco	Nyctosaurid-like but with teeth; named 2018
Nyctosaurus gracilis	“Night lizard” (slender)	Late Cretaceous (Coniacian–Santonian)	6–13 ft (2–4 m)	Cat to large dog-sized	Kansas, USA	Extremely reduced wing fingers; some specimens with huge branching antler-like head crest
Pteranodon longiceps	“Winged and toothless” (long skull)	Late Cretaceous (Coniacian–Campanian)	20–26 ft (6–8 m)	Man-sized	Kansas, USA	Iconic long backward-pointing crest (males); thousands of specimens; no teeth
Quetzalcoatlus lawsoni	“Feathered serpent god” (Lawson’s)	Late Cretaceous (Maastrichtian)	16–36 ft (5–11+ m)	Giraffe to elephant-sized	Texas, USA	Two species now recognised: giant Q. northropi (up to 11 m wingspan) and smaller Q. lawsoni (~5–6 m)

ORDER SAURISCHIA (“lizard-hipped” dinosaurs)

└─ Suborder Theropoda

├─ Infraorder Coelurosauria

├─ Coelophysidae

├─ Coelophysis bauri

├─ Procompsognathus triassicus

└─ Saltopus elginensis

├─ Coeluridae · Coelurus fragilis

├─ Compsognathidae · Compsognathus longipes

├─ Proceratosauridae · Proceratosaurus bradleyi

├─ Nanotyrannidae

├─ Moros intrepidus

└─ Nanotyrannus lethaeus

├─ Ornithomimidae

├─ Dromiceiomimus samueli

├─ Gallimimus bullatus

├─ Ornithomimus velox

└─ Struthiomimus altus

├─ Deinocheiridae · Deinocheirus mirificus

├─ Oviraptoridae · Oviraptor philoceratops

├─ Saurornithoididae

├─ Saurornithoides mongoliensis

├─ Stenonychosaurus inequalis

└─ Troodon formosus

└─ Therizinosauridae · Therizinosaurus cheloniformis

├─ Infraorder Deinonychosauria

├─ Dromaeosauridae

├─ Bambiraptor feinbergi

├─ Dakotaraptor steini

├─ Deinonychus antirrhopus

├─ Dromaeosaurus albertensis

├─ Saurornitholestes sullivani

└─ Velociraptor osmolskae

└─ Archaeopterygidae · Archaeopteryx albersdoerferi

├─ Infraorder Ceratosauria

└─ Ceratosauridae

├─ Ceratosaurus nasicornis

├─ Dilophosaurus wetherilli

└─ Elaphrosaurus bambergi

└─ Infraorder Carnosauria

├─ Megalosauridae

├─ Eustreptospondylus oxoniensis

├─ Giganotosaurus carolinii

└─ Poekilopleuron bucklandii

├─ Allosauridae

├─ Allosaurus europaeus

└─ Yangchuanosaurus zigongensis

├─ Spinosauridae

├─ Acrocanthosaurus atokensis

└─ Spinosaurus aegyptiacus

└─ Tyrannosauridae

├─ Albertosaurus sarcophagus

├─ Alioramus altai

├─ Daspletosaurus horneri

├─ Tarbosaurus bataar

└─ Tyrannosaurus rex

└─ Suborder Sauropodomorpha

├─ Infraorder Prosauropoda

├─ Herrerasauridae

├─ Herrerasaurus ischigualastensis

├─ Sanjuansaurus gordilloi

├─ Smurfette smurfensis (Peyo’s The Smurfs)

└─ Staurikosaurus pricei

├─ Anchisauridae

├─ Anchisaurus polyzelus

├─ Efraasia minor

└─ Thecodontosaurus antiquus

├─ Plateosauridae

├─ Massospondylus kaalae

├─ Mussaurus patagonicus

└─ Plateosaurus gracilis

└─ Melanorosauridae · Riojasaurus incertus

└─ Infraorder Sauropoda

├─ Cetiosauridae

├─ Barapasaurus tagorei

└─ Cetiosaurus oxoniensis

├─ Brachiosauridae

├─ Brachiosaurus altithorax

└─ Sauroposeidon proteles

├─ Camarasauridae

├─ Camarasaurus supremus

├─ Euhelopus zdanskyi

└─ Opisthocoelicaudia skarzynskii

├─ Diplodocidae

├─ Apatosaurus ajax

├─ Dicraeosaurus sattleri

├─ Diplodocus hallorum

├─ Mamenchisaurus sinocanadorum

└─ Supersaurus vivianae

└─ Titanosauridae

├─ Alamosaurus sanjuanensis

├─ Dreadnoughtus schrani

└─ Saltasaurus loricatus

Genus List for Holtz (2026): Theropods

Genus & Species	Name Meaning	Age	Time	Diet	Height	Length	Weight	Author	Region / Formation	Cartoon All-Stars's Comments/Facts
INFRAORDER CERATOSAURIA
Coelophysis bauri	"Hollow form"	203 Ma	Late Triassic	Carnivore	1.0 m	3.0 m	30 kg	Cope (1889)	USA (Chinle Fm)	Bugs Bunny: "A quick little fella, doc! He was built like a greyhound and ran circles around the early Triassic slow-pokes."
Procompsognathus triassicus	"Before elegant jaw"	210 Ma	Late Triassic	Insectivore / Carnivore	0.3 m	1.0 m	1 kg	Fraas (1913)	Germany (Stubensandstein)	Brainy Smurf: "A primitive coelophysid. Statistically, its lightweight skeletal structure allowed it to hunt small lizards with extreme speed!"
Saltopus elginensis	"Hopping foot"	225 Ma	Late Triassic	Insectivore	0.2 m	0.6 m	1 kg	Huene (1910)	Scotland (Lossiemouth)	Papa Smurf: "One of our very earliest dinosauriform relatives. So small he could fit right inside a Smurf house!"
Ceratosaurus nasicornis	"Horned lizard"	150 Ma	Late Jurassic	Carnivore	2.5 m	6.0 m	700 kg	Marsh (1884)	USA (Morrison Fm)	Daffy Duck: "He’s got a big prominent horn right on his nose and a row of bony armor plates down his back! Talk about over-accessorizing! It's despicable!"
Dilophosaurus wetherilli	"Two-crested lizard"	193 Ma	Early Jurassic	Carnivore	2.0 m	7.0 m	400 kg	Welles (1954)	USA (Kayenta Fm)	Optimus Prime: "A powerful Early Jurassic predator. Contrary to fictional holo-vids, it did not possess a neck frill or spit acid; its dual head crests were purely architectural displays."
Carnotaurus sastrei	"Meat-eating bull"	70 Ma	Late Cretaceous	Carnivore	3.0 m	7.8 m	1,500 kg	Bonaparte (1985)	Argentina (La Colonia Fm)	Tigger: "He’s got actual bull horns! And his arms are so teeny-tiny they make a T-Rex look like a champion hugger! Hoo-hoo-hoo!"
Majungasaurus crenatissimus	"Mahajanga lizard"	66 Ma	Late Cretaceous	Carnivore	2.0 m	7.0 m	1,100 kg	Lavocat (1955)	Madagascar (Maevarano Fm)	Garfield: "A stocky predator with an extra-thick skull and short legs. Fossil teeth marks prove he wasn't above eating his own kind when dinner was scarce."
Elaphrosaurus bambergi	"Lightweight lizard"	150 Ma	Late Jurassic	Omnivore / Carnivore	2.0 m	6.2 m	210 kg	Janensch (1920)	Tanzania (Tendaguru Fm)	Thea Stilton: "An incredibly long, slender body built for pure speed. A truly elegant design for the Jurassic landscape. Fabumouse!"
Noasaurus leali	"Northwestern Argentina lizard"	70 Ma	Late Cretaceous	Carnivore	0.8 m	2.4 m	15 kg	Bonaparte (1980)	Argentina (Lecho Fm)	Alvin: "He’s small, but he has a unique secret weapon—a specialized, curved claw that scientists think might have been on his finger or toe!"
INFRAORDER CARNOSAURIA
Eustreptospondylus oxoniensis	"True well-curved vertebra"	163 Ma	Middle Jurassic	Carnivore	1.5 m	4.6 m	220 kg	Walker (1964)	UK (Oxford Clay)	Geronimo Stilton: "This island-dwelling carnivore was a fantastic swimmer, searching beach coastlines for marine scraps. Splendiferous!"
Metriacanthosaurus parkeri	"Moderately-spined lizard"	160 Ma	Late Jurassic	Carnivore	2.5 m	8.0 m	1,000 kg	Walker (1964)	UK (Oxford Clay)	Michelangelo: "Check out the tall spines on this dude's back! He’s like an Allosaurus cousin with a radical mini-sail going on!"
Poekilopleuron bucklandii	"Varied ribs"	168 Ma	Middle Jurassic	Carnivore	2.0 m	7.0 m	1,000 kg	Eudes-Deslongchamps (1838)	France (Calcaire de Caen)	Winnie the Pooh: "One of the very earliest large meat-eating dinosaurs ever named. He has very strong arms with big sharp claws."
Torvosaurus gurneyi	"Savage lizard"	150 Ma	Late Jurassic	Carnivore	3.2 m	10.0 m	4,000 kg	Hendrickx (2014)	Portugal (Lourinhã Fm)	Optimus Prime: "The megalosaurid apex predator of Jurassic Europe. Its robust skull and massive teeth made it a devastating force of its era."
Acrocanthosaurus atokensis	"High-spined lizard"	110 Ma	Early Cretaceous	Carnivore	4.0 m	11.5 m	6,200 kg	Stovall (1950)	USA (Antlers Fm)	Bugs Bunny: "He’s got a giant ridge of muscle running all the way down his back, doc! A real heavyweight contender of the Early Cretaceous."
Carcharodontosaurus iguidensis	"Shark-toothed lizard"	95 Ma	Late Cretaceous	Carnivore	6.1 m	15.5 m	6,000 kg	Brusatte (2007)	Niger (Echkar Fm)	Daffy Duck: "Teeth just like a Great White Shark! Slicing and dicing his way through Africa! It’s down-right terrifying! It's despicable!"
Giganotosaurus carolinii	"Giant southern lizard"	97 Ma	Late Cretaceous	Carnivore	4.2 m	12.5 m	7,000 kg	Coria (1995)	Argentina (Candeleros Fm)	Optimus Prime: "An absolute titan among theropods, eclipsing most North American carnivores in sheer length. A massive engine of destruction."
Allosaurus europaeus	"Different lizard"	150 Ma	Late Jurassic	Carnivore	3.5 m	11.5 m	1,000 kg	Mateus (2006)	Portugal / USA (Lourinhã / Morrison Fm)	Michelangelo: "The classic Jurassic slasher! He used his upper jaw like a radical meat-axe to take down large sauropods!"
Yangchuanosaurus zigongensis	"Yangchuan lizard"	160 Ma	Late Jurassic	Carnivore	3.5 m	8.0 m	1,300 kg	Gao (1993)	China (Shaximiao Fm)	Dawn: "He has a bumpy bony ridge on his snout! He was the king of the Jurassic forests in ancient Asia."
Baryonyx walkeri	"Heavy claw"	125 Ma	Early Cretaceous	Piscivore / Carnivore	2.5 m	9.0 m	1,700 kg	Charig (1986)	UK (Weald Clay)	Bluey: "He’s got a giant hook claw on his thumb for gaffing massive fish out of the rivers, for real life!"
Spinosaurus aegyptiacus	"Spine lizard"	95 Ma	Late Cretaceous	Piscivore / Semi-aquatic	4.5 m	14.0 m	7,400 kg	Stromer (1915)	Egypt (Bahariya Fm)	Garfield: "A river monster with a giant 6-foot sail, paddle-like tail, and crocodile snout. Finally, a carnivore that prefers seafood over manual labor."
Suchomimus tenerensis	"Crocodile mimic"	112 Ma	Early Cretaceous	Piscivore	3.0 m	9.5 m	2,500 kg	Sereno (1998)	Niger (Elrhaz Fm)	Tigger: "A long, skinny snout full of needle-sharp teeth! He’s like a crocodile trying to stand up and hop around! Hoo-hoo-hoo!"
Albertosaurus sarcophagus	"Alberta lizard"	70 Ma	Late Cretaceous	Carnivore	3.0 m	9.0 m	2,000 kg	Osborn (1905)	Canada (Horseshoe Canyon)	Thea Stilton: "A sleek, fast-running tyrannosaur. Bonebed evidence suggests they may have hunted in stylish, coordinated family packs! Fabumouse!"
Alioramus altai	"Different branch"	70 Ma	Late Cretaceous	Carnivore	2.0 m	5.5 m	700 kg	Brusatte (2009)	Mongolia (Nemegt Fm)	Alvin: "The long-snouted tyrannosaur! He’s got eight pointy little hornlet bumps running right down his nose line!"
Daspletosaurus horneri	"Frightful lizard"	75 Ma	Late Cretaceous	Carnivore	3.2 m	9.0 m	2,500 kg	Carr (2017)	USA (Two Medicine Fm)	Brainy Smurf: "A very close relative of T-Rex. Statistically, its facial bones show they had highly sensitive skin on their snouts, like modern crocodilians!"
Qianzhousaurus sinensis	"Qianzhou lizard"	66 Ma	Late Cretaceous	Carnivore	2.2 m	6.3 m	800 kg	Lü (2014)	China (Nanxiong Fm)	Bugs Bunny: "Nicknamed 'Pinocchio Rex', doc! He’s got an ultra-long, narrow snout that set him apart from his chunky-headed cousins."
Tarbosaurus bataar	"Alarming lizard"	70 Ma	Late Cretaceous	Carnivore	3.5 m	10.0 m	4,500 kg	Maleev (1955)	Mongolia (Nemegt Fm)	Optimus Prime: "The apex predator of Late Cretaceous Asia. Mechanically similar to Tyrannosaurus, but with a more rigid skull structure for crushing heavy bone."
Tyrannosaurus rex	"Tyrant lizard king"	66 Ma	Late Cretaceous	Carnivore	6.0 m	15.0 m	8,400 kg	Osborn (1905)	USA (Hell Creek, Lance Fm)	Optimus Prime: "The ultimate evolutionary culmination of terrestrial predation. Possessing a bone-crushing bite force unmatched by any land animal in history."
INFRAORDER COELUROSAURIA
Coelurus fragilis	"Hollow tail"	150 Ma	Late Jurassic	Insectivore / Carnivore	0.7 m	2.4 m	20 kg	Marsh (1879)	USA (Morrison Fm)	Winnie the Pooh: "A small, quiet little dinosaur who hid in the bushes from the big Allosaurus. He had very delicate, hollow bones."
Compsognathus longipes	"Elegant jaw"	150 Ma	Late Jurassic	Carnivore / Insectivore	0.3 m	1.2 m	3 kg	Wagner (1859)	Germany (Solnhofen)	Geronimo Stilton: "Famously small and agile! One fossil even preserves a perfectly fossilized desert lizard inside its tummy cavity! Fascinating!"
Sinosauropteryx lingyuanensis	"Chinese lizard wing"	122 Ma	Early Cretaceous	Carnivore / Insectivore	0.4 m	1.0 m	1 kg	Ji (1996)	China (Yixian Fm)	Dawn: "The first dinosaur proven to have real feathers! Scientists even figured out it had a striped, ginger-colored tail like a raccoon!"
Proceratosaurus bradleyi	"Before Ceratosaurus"	166 Ma	Middle Jurassic	Carnivore	1.0 m	3.0 m	40 kg	Woodward (1910)	UK (Forest Marble Fm)	Brainy Smurf: "Despite the deceptive name, it isn't a Ceratosaurus ancestor at all! It is actually the earliest known member of the tyrannosauroid lineage!"
Moros intrepidus	"Doom harbinger"	96 Ma	Late Cretaceous	Carnivore	1.2 m	2.5 m	80 kg	Zanno (2019)	USA (Cedar Mountain Fm)	Bugs Bunny: "A pint-sized tyrannosaur, doc! He was small and fast, biding his time before his ancestors grew up to rule the continent."
Nanotyrannus lethaeus	"Dwarf tyrant"	66 Ma	Late Cretaceous	Carnivore	2.0 m	5.0 m	600 kg	Bakker (1988)	USA (Hell Creek Fm)	Daffy Duck: "Is it a baby T-Rex or a completely different sleek, fast-running ninja killer? The debate rages on! It’s scandalous!"
Archaeornithomimus asiaticus	"Ancient bird mimic"	90 Ma	Late Cretaceous	Herbivore / Omnivore	1.1 m	3.3 m	50 kg	Russell (1972)	China (Iren Dabasu Fm)	Thea Stilton: "An early ostrich dinosaur! Completely toothless beak, long slender neck, and built for a high-speed desert lifestyle. Fabumouse!"
Dromiceiomimus samueli	"Emu mimic"	73 Ma	Late Cretaceous	Omnivore	1.5 m	3.5 m	100 kg	Parks (1926)	Canada (Horseshoe Canyon)	Alvin: "He has huge eyes and incredibly long, thin legs! He could probably outrun any modern racehorse with ease!"
Gallimimus bullatus	"Rooster mimic"	70 Ma	Late Cretaceous	Omnivore	2.0 m	6.0 m	450 kg	Osmólska (1972)	Mongolia (Nemegt Fm)	Michelangelo: "The granddaddy of the ostrich dinos! These guys flocked together across the plains like a radical herd of giant birds!"
Ornithomimus velox	"Bird mimic"	66 Ma	Late Cretaceous	Omnivore	1.6 m	3.8 m	170 kg	Marsh (1890)	USA (Denver Fm)	Bluey: "He’s got feathers all along his long arms like modern wings, but he uses them for showing off, not flying, for real life!"
Struthiomimus altus	"Ostrich mimic"	75 Ma	Late Cretaceous	Omnivore	1.8 m	4.3 m	150 kg	Lambe (1902)	Canada / USA (Dinosaur Park / Lance)	Garfield: "A toothless herbivorous theropod. Basically a 400-pound turkey that can run 40 miles per hour. Pass the cranberry sauce."
Deinocheirus mirificus	"Unusual horrible hand"	70 Ma	Late Cretaceous	Omnivore	6.2 m	13.5m	6,400 kg	Osmólska (1970)	Mongolia (Nemegt Fm)	Tigger: "He’s a giant duck-billed camel-backed ostrich monster with 8-foot-long arms! The most mixed-up bouncy creature ever! Hoo-hoo-hoo!"
Avimimus nemegtensis	"Bird mimic"	70 Ma	Late Cretaceous	Omnivore	1.0 m	1.5 m	15 kg	Kurzanov (1981)	Mongolia (Nemegt Fm)	Brainy Smurf: "An extremely avian oviraptorosaur. Statistically, its leg bones are so fused together that it shared almost identical running mechanics with modern ground birds!"
Oviraptor philoceratops	"Egg thief"	75 Ma	Late Cretaceous	Omnivore	1.2 m	1.6 m	35 kg	Osborn (1924)	Mongolia (Djadokhta Fm)	Winnie the Pooh: "A misunderstood friend. They named him an egg thief, but fossils show he was actually sitting gently on his own nest to keep his babies warm."
Protarchaeopteryx robusta	"Before ancient wing"	125 Ma	Early Cretaceous	Herbivore / Omnivore	0.7 m	1.0 m	5 kg	Ji (1997)	China (Yixian Fm)	Dawn: "A short-tailed oviraptor relative covered in a beautiful fan of long, symmetrical display feathers!"
Therizinosaurus cheloniformis	"Scythe lizard"	70 Ma	Late Cretaceous	Herbivore	5.0 m	10.0 m	5,000 kg	Maleev (1954)	Mongolia (Nemegt Fm)	Michelangelo: "Dude!! Look at those 3-foot long scythe claws! He looks like a giant terrifying Freddy Krueger monster but he just wants to eat salad! Totally wild!"
INFRAORDER DEINONYCHOSAURIA
Saurornithoides mongoliensis	"Bird-like lizard"	75 Ma	Late Cretaceous	Carnivore	1.0 m	3.0 m	40 kg	Osborn (1924)	Mongolia (Djadokhta Fm)	Geronimo Stilton: "A highly intelligent troodontid with massive eye sockets, perfect for nocturnal moonlit hunting excursions!"
Stenonychosaurus inequalis	"Narrow claw lizard"	76 Ma	Late Cretaceous	Carnivore / Omnivore	1.0 m	2.5 m	50 kg	Sternberg (1932)	Canada (Dinosaur Park)	Brainy Smurf: "Possessed one of the highest brain-to-body mass ratios of any non-avian dinosaur, indicating advanced observational intelligence."
Troodon formosus	"Wounding tooth"	77 Ma	Late Cretaceous	Carnivore / Omnivore	1.0 m	2.4 m	50 kg	Leidy (1856)	USA (Judith River Fm)	Daffy Duck: "A classic dubious name! The whole genus is based on a single serrated tooth fossil! It’s scientific chaos! It's despicable!"
Bambiraptor feinbergi	"Bambi thief"	72 Ma	Late Cretaceous	Carnivore	0.4 m	0.9 m	2 kg	Burnham (2000)	USA (Two Medicine Fm)	Winnie the Pooh: "A tiny, fuzzy little raptor friend. He was so bird-like that he was almost completely covered in soft feathers."
Dakotaraptor steini	"Dakota thief"	66 Ma	Late Cretaceous	Carnivore	1.8 m	5.5 m	350 kg	DePalma (2015)	USA (Hell Creek Fm)	Optimus Prime: "A giant dromaeosaurid that occupied the mid-tier predator niche in Hell Creek, hunting prey too agile for the native tyrannosaurs."
Deinonychus antirrhopus	"Counterbalancing terrible claw"	115 Ma	Early Cretaceous	Carnivore	1.0 m	3.4 m	100 kg	Ostrom (1969)	USA (Cloverly Fm)	Optimus Prime: "The catalyst of the 'Dinosaur Renaissance'. Its lethal sickle-claw and stiffened, counter-balancing tail proved dinosaurs were dynamic, warm-blooded pack hunters."
Dromaeosaurus albertensis	"Running lizard"	75 Ma	Late Cretaceous	Carnivore	0.6 m	2.0 m	15 kg	Matthew (1922)	Canada (Dinosaur Park)	Alvin: "Unlike the sleek raptors, this guy had a short, heavy skull and a bone-crushing bite for his size!"
Saurornitholestes sullivani	"Lizard-bird thief"	75 Ma	Late Cretaceous	Carnivore	0.6 m	1.8 m	10 kg	Sues (1978)	USA (Kirtland Fm)	Thea Stilton: "A small raptor with an incredibly advanced sense of smell, perfect for tracking small prey through the dark undergrowth. Fabumouse!"
Velociraptor osmolskae	"Swift thief"	75 Ma	Late Cretaceous	Carnivore	0.5 m	2.0 m	15 kg	Godefroit (2008)	China (Bayan Mandahu)	Bugs Bunny: "About the size of a turkey, doc! Forget the giant scaly movie monsters—this real-world star was completely covered in feathers."
Archaeopteryx albersdoerferi	"Ancient wing"	150 Ma	Late Jurassic	Carnivore / Insectivore	0.2 m	0.5 m	0.5 kg	Kundrát (2019)	Germany (Solnhofen)	Papa Smurf: "The famous missing link. Half dinosaur with teeth and a long bony tail, half bird with beautifully asymmetric flight feathers."

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Coelophysis bauri	“Hollow form” (Baur’s)	Late Triassic (Norian–Rhaetian)	9–10 ft (2.7–3 m)	Wolf-sized	New Mexico, USA	One of the most abundant early theropods; hundreds of skeletons known; long tail for balance
Procompsognathus triassicus	“Before elegant jaw” (Triassic)	Late Triassic (Norian)	~3.3 ft (1 m)	Chicken-sized	Germany	Poorly known; originally thought to have a “sliding” jaw joint; possibly a chimera
Saltopus elginensis	“Leaping foot” (from Elgin)	Late Triassic (Norian)	~2 ft (0.6 m)	Cat-sized	Scotland	Very fragmentary; long debated if it is a dinosaur or close relative
Segisaurus halli	“Segi Canyon lizard” (Halli’s)	Early Jurassic (Pliensbachian)	~3.3 ft (1 m)	Turkey-sized	Arizona, USA	Known from one partial skeleton; very similar to Coelophysis but younger
Coelurus fragilis	“Hollow tail” (fragile)	Late Jurassic (Kimmeridgian)	~7–8.5 ft (2.1–2.6 m)	Gazelle-sized	Wyoming, USA	Very gracile; one of the first small theropods named; long neck and legs
Ornitholestes hermanni	“Bird robber” (Hermann’s)	Late Jurassic (Kimmeridgian)	~6.6 ft (2 m)	Large dog-sized	Wyoming, USA	Once thought to have a nasal crest (error in restoration); fast predator
Aristosuchus pusillus	“Noblest crocodile” (very small)	Early Cretaceous (Barremian)	~6.6 ft (2 m)	Medium dog-sized	Isle of Wight, UK	Known only from pelvis; once confused with Calamosaurus
Compsognathus longipes	“Elegant jaw” (long foot)	Late Jurassic (Tithonian)	2.3–4.6 ft (0.7–1.4 m)	Chicken to turkey-sized	Germany, France	Classic “chicken-sized” dinosaur; excellent preservation, including gut contents
Scipionyx samniticus	“Scipio’s claw” (from Sannio)	Early Cretaceous (Albian)	~1.6 ft (0.5 m)	Kitten-sized	Italy	Spectacularly preserved juvenile with visible intestines, liver, and muscle fibers
Proceratosaurus bradleyi	“Before Ceratosaurus” (Bradley’s)	Middle Jurassic (Bathonian)	~10 ft (3 m)	Large dog-sized	England	Early tyrannosauroid with small nasal crest; once misidentified as a ceratosaur
Alectrosaurus olseni	“Alone lizard” (Olsen’s)	Late Cretaceous (Campanian)	~16–20 ft (5–6 m)	Rhino-sized	Mongolia, China	Rare Asian tyrannosauroid; long limbs suggest fast runner
Moros intrepidus	“Moros” (Greek fate) + “intrepid”	Early Cretaceous (Cenomanian)	~6 ft (1.8 m)	Large dog-sized	Utah, USA	Oldest known North American tyrannosauroid; shows Asian origin of the clade
Stokesosaurus clevelandi	“Stokes’ lizard” (Cleveland’s)	Late Jurassic (Kimmeridgian)	~13 ft (4 m)	Grizzly bear-sized	Utah, USA	Early tyrannosauroid; known from hip bones and a premaxilla
Dryptosaurus aquilunguis	“Tearing lizard” (eagle claw)	Late Cretaceous (Maastrichtian)	20–25 ft (6–7.5 m)	Rhino-sized	New Jersey, USA	Eastern North American tyrannosauroid; long arms with large claws; formerly “Laelaps”
Nanotyrannus lethaeus	“Dwarf tyrant” (destructive)	Late Cretaceous (Maastrichtian)	~17–20 ft (5–6 m)	Smaller than T. rex	Montana, USA	Controversial; may be juvenile Tyrannosaurus rex instead of a separate genus
Megaraptor namunhuaiquii	“Great plunderer” (from Neuquén)	Late Cretaceous (Turonian–Coniacian)	~23–26 ft (7–8 m)	Rhino-sized	Argentina	Large claws once thought to be sickle claws; now considered a basal coelurosaur or carcharodontosaurid
Avimimus nemegtensis	“Bird mimic” (from Nemegt)	Late Cretaceous (Maastrichtian)	~5 ft (1.5 m)	Turkey-sized	Mongolia	Bird-like with toothless beak, long legs, and possible feather attachment ridges
Archaeopteryx albersdoerferi	“Ancient wing” (Albersdörfer’s specimen)	Late Jurassic (Tithonian)	~1.6 ft (0.5 m)	Pigeon to chicken-sized	Germany	One of the many specimens of Archaeopteryx; shows clear feathers and wishbone

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Archaeornithomimus asiaticus	“Ancient bird mimic” (Asian)	Late Cretaceous (Campanian)	~11 ft (3.3 m)	Ostrich-sized	China	Early ornithomimosaur; still had small teeth
Dromiceiomimus samueli	“Dromiceius mimic” (Samuel’s)	Late Cretaceous (Maastrichtian)	~12 ft (3.5 m)	Ostrich-sized	Alberta, Canada	Formerly a species of Ornithomimus; very long limbs, large eyes
Gallimimus bullatus	“Chicken mimic” (with bubble)	Late Cretaceous (Maastrichtian)	20 ft (6 m)	Ostrich to giraffe-sized	Mongolia	Largest ornithomimid; broad duck-like beak, huge eye sockets
Ornithomimus velox	“Bird mimic” (swift)	Late Cretaceous (Maastrichtian)	12–15 ft (3.5–4.5 m)	Ostrich-sized	Alberta, Canada; USA	Classic “ostrich dinosaur”; long arms with grasping hands
Struthiomimus altus	“Ostrich mimic” (tall)	Late Cretaceous (Maastrichtian)	14 ft (4.3 m)	Ostrich-sized	Alberta, Canada	Very long hands; possibly feathered
Deinocheirus mirificus	“Terrible hand” (miraculous)	Late Cretaceous (Campanian)	36 ft (11 m)	Elephant-sized	Mongolia	Gigantic arms (8.5 ft long) with huge claws; hump-backed, sail-backed in life
Erlikosaurus andrewsi	“Erlic’s lizard” (Andrews’)	Late Cretaceous (Turonian)	~10–13 ft (3–4 m)	Bear-sized	Mongolia	Therizinosaur with well-preserved skull; toothless beak, long neck
Segnosaurus galbinensis	“Slow lizard” (from Galbin)	Late Cretaceous (Turonian)	~20–23 ft (6–7 m)	Rhino-sized	Mongolia	Large therizinosaur; broad pelvis, pot-bellied herbivore
Therizinosaurus cheloniformis	“Scythe lizard” (turtle form)	Late Cretaceous (Maastrichtian)	~33 ft (10 m)	Elephant-sized	Mongolia	Longest arms/claws of any animal (3 ft claws); herbivorous “sloth dinosaur”
Adasaurus mongoliensis	“Ada’s lizard” (Mongolian)	Late Cretaceous (Maastrichtian)	~6–8 ft (1.8–2.4 m)	Wolf-sized	Mongolia	Small sickle claw compared to other dromaeosaurids
Austroraptor cabazai	“Southern thief” (Cabaza’s)	Late Cretaceous (Campanian)	16–20 ft (5–6 m)	Grizzly bear-sized	Argentina	One of the largest dromaeosaurids; long, low snout like a crocodile
Bambiraptor feinbergi	“Bambi thief” (Feinberg’s)	Late Cretaceous (Campanian)	~4 ft (1.2 m)	Large cat-sized	Montana, USA	Nearly complete juvenile; very bird-like brain and skeleton
Dakotaraptor steini	“Dakota thief” (Stein’s)	Late Cretaceous (Maastrichtian)	~17–20 ft (5–6 m)	Grizzly bear-sized	South Dakota, USA	Giant North American dromaeosaurid; large sickle claw, possibly quill knobs
Deinonychus antirrhopus	“Terrible claw” (counter-balanced)	Early Cretaceous (Aptian–Albian)	11 ft (3.4 m)	Wolf to lion-sized	USA (MT, WY, OK)	Revolutionized views of active, agile predators; large sickle claw
Dromaeosaurus albertensis	“Running lizard” (from Alberta)	Late Cretaceous (Campanian)	~6 ft (1.8 m)	Wolf-sized	Alberta, Canada	First dromaeosaurid named; robust skull, powerful bite
Saurornitholestes sullivani	“Lizard-bird thief” (Sullivan’s)	Late Cretaceous (Campanian)	~6 ft (1.8 m)	Wolf-sized	Alberta, Canada; USA	Very common in North America; sharp serrated teeth
Velociraptor osmolskae	“Swift thief” (dedicated to Osmólska)	Late Cretaceous (Campanian)	5–6 ft (1.5–1.8 m)	Turkey to wolf-sized	Mongolia	Famous from “fighting dinosaurs” specimen; large sickle claw, probably feathered
Bradycneme draculae	“Heavy leg” (“Dracula”)	Late Cretaceous (Maastrichtian)	?	?	Romania	Very fragmentary; once thought alvarezsaurid, now probably a troodontid
Hesperornithoides miessleri	“Western bird form” (Miessler’s)	Late Jurassic (Kimmeridgian)	~3 ft (1 m)	Chicken-sized	Wyoming, USA	Oldest known North American troodontid/paravian; shows early bird-like traits
Saurornithoides mongoliensis	“Lizard-bird form” (Mongolian)	Late Cretaceous (Campanian)	~6–10 ft (2–3 m)	Wolf-sized	Mongolia	Large brain and eyes; stereoscopic vision, possibly nocturnal
Stenonychosaurus inequalis	“Narrow claw” (unequal)	Late Cretaceous (Campanian)	~7 ft (2.2 m)	Wolf-sized	Alberta, Canada	Formerly “Troodon” in part; long grasping hands, large brain
Troodon formosus	“Wounding tooth” (beautiful)	Late Cretaceous (Campanian–Maa)	~7–8 ft (2–2.5 m)	Wolf-sized	Alaska to Texas, USA; Canada	Largest brain relative to body size among dinosaurs; possibly warm-blooded
Conchoraptor gracilis	“Conch thief” (slender)	Late Cretaceous (Campanian)	~5 ft (1.5 m)	Turkey-sized	Mongolia	Toothless, crest on skull; probably crushed shellfish or seeds
Oviraptor philoceratops	“Egg thief” (lover of ceratopsians)	Late Cretaceous (Campanian)	5–6 ft (1.5–1.8 m)	Turkey-sized	Mongolia	Found on nest; originally thought to eat eggs, now known to be brooding its own
Caudipteryx dongi	“Tail feather” (Dong’s)	Early Cretaceous (Aptian)	~3 ft (0.9 m)	Turkey-sized	Liaoning, China	Beautifully preserved feathers; fan of tail feathers, gastralia “seed gut”
Chirostenotes pergracilis	“Narrow hand” (very slender)	Late Cretaceous (Campanian)	~6–8 ft (1.8–2.4 m)	Ostrich-sized	Alberta, Canada	Toothless jaws, long arms; formerly “Caenagnathus”
Elmisaurus rarus	“Foot sole lizard” (rare)	Late Cretaceous (Campanian)	~6–8 ft (2 m)	Ostrich-sized	Mongolia	Known mainly from feet and hands; long metatarsals for running

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Ceratosaurus nasicornis	“Horned lizard” (with nose horn)	Late Jurassic (Kimmeridgian–Tithonian)	20–23 ft (6–7 m)	Rhino-sized	Colorado, Utah, USA; Portugal	Nasal horn + brow ridges; blade-like teeth; deeper tail than Allosaurus; lived alongside giants
Dilophosaurus wetherilli	“Two-crested lizard” (Wetherill’s)	Early Jurassic (Sinemurian–Pliensbachian)	20–23 ft (6–7 m)	Grizzly bear to rhino-sized	Arizona, USA	Famous paired crests (display only); NO frill or venom; weak bite, long arms and claws
Elaphrosaurus bambergi	“Lightweight lizard” (Bamberg’s)	Late Jurassic (Kimmeridgian–Tithonian)	~20 ft (6 m)	Ostrich to horse-sized	Tendaguru, Tanzania	Very long neck and legs; toothless or nearly so; lightly built, possibly omnivorous
Noasaurus leali	“Northwestern Argentina lizard” (Leal’s)	Late Cretaceous (Campanian)	~6–8 ft (2–2.5 m)	Wolf to lion-sized	Argentina	Tiny arms with huge curved claw (like dromaeosaurid sickle claw); close to Velociraptor relatives
Carnotaurus sastrei	“Meat-eating bull” (Sastrei’s)	Late Cretaceous (Maastrichtian)	25–28 ft (7.5–8.5 m)	Rhino-sized	Patagonia, Argentina	Shortest arms of any large theropod; thick horns over eyes; skin impressions with bumps
Majungasaurus crenatissimus	“Mahajanga lizard” (very notched)	Late Cretaceous (Maastrichtian)	23–26 ft (7–8 m)	Rhino-sized	Madagascar	Single midline horn; blunt snout; evidence of cannibalism (tooth marks on bones)

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Eustreptospondylus oxoniensis	“Well-curved vertebrae” (from Oxford)	Middle–Late Jurassic (Callovian–Oxfordian)	~23 ft (7 m)	Rhino-sized	England; France	Closest European relative of Allosaurus; once called “Streptospondylus”
Poekilopleuron bucklandii	“Varied ribs” (Buckland’s)	Middle Jurassic (Bathonian)	~23–29 ft (7–9 m)	Rhino-sized	Normandy, France	Known from destroyed specimen; long arms, three-fingered hands
Torvosaurus gurneyi	“Savage lizard” (Gurney's)	Late Jurassic (Kimmeridgian–Tithonian)	~33–36 ft (10–11 m)	Elephant-sized	Portugal; USA (Colorado, Wyoming)	One of the largest Jurassic predators; thick arms and claws
Acrocanthosaurus atokensis	“High-spined lizard” (from Atoka County)	Early Cretaceous (Aptian–Albian)	36–39 ft (11–12 m)	Elephant-sized	Oklahoma, Texas, USA	Tall neural spines formed a sail or hump; deep skull like carcharodontosaurids
Carcharodontosaurus iguidensis	“Shark-toothed lizard” (from Iguidi)	Early–Late Cretaceous (Cenomanian)	39–44 ft (12–13.5 m)	T. rex–sized	Niger, Morocco, Algeria	Rivaled Tyrannosaurus in size; braincase shows large olfactory bulbs
Giganotosaurus carolinii	“Giant southern lizard” (Carolina’s)	Late Cretaceous (Cenomanian)	41–46 ft (12.5–14 m)	Larger than T. rex	Patagonia, Argentina	Largest known carcharodontosaurid; lived with Mapusaurus in huge bonebeds
Allosaurus europaeus	“Different lizard” (European)	Late Jurassic (Kimmeridgian)	~28–33 ft (8.5–10 m)	Rhino to elephant-sized	Portugal, USA	European species of Allosaurus; formerly “A. atrox” in part
Metriacanthosaurus parkeri	“Moderately spined lizard” (Parker’s)	Middle–Late Jurassic (Oxfordian)	~26 ft (8 m)	Rhino-sized	England	Tall neural spines; once called “Altispinax”
Yangchuanosaurus zigongensis	“Yangzhong lizard” (from Zigong)	Middle–Late Jurassic (Oxfordian)	26–33 ft (8–10 m)	Rhino to elephant-sized	Sichuan, China	Chinese equivalent of Allosaurus; long, deep skull
Baryonyx walkeri	“Heavy claw” (Walker’s)	Early Cretaceous (Barremian)	30–33 ft (9–10 m)	Rhino to elephant-sized	England; Spain; Portugal	Huge thumb claw (1 ft long); fish-eating; crocodile-like snout
Suchomimus tenerensis	“Crocodile mimic” (from Ténéré)	Early Cretaceous (Aptian)	31–36 ft (9.5–11 m)	Elephant-sized	Niger	Low sail on back; narrower snout than Baryonyx
Spinosaurus aegyptiacus	“Spine lizard” (Egyptian)	Early–Late Cretaceous (Cenomanian)	46–59 ft (14–18 m)	Largest theropod ever	Egypt, Morocco, Algeria	Sail over 6 ft tall; crocodile-like skull; possibly semi-aquatic with paddle-like tail and dense bones
Albertosaurus sarcophagus	“Alberta lizard” (flesh-eater)	Late Cretaceous (Maastrichtian)	26–33 ft (8–10 m)	Smaller than T. rex	Alberta, Canada	Slender build; dozens of skeletons from bonebeds; formerly “Gorgosaurus” in part
Daspletosaurus horneri	“Frightful lizard” (Horner’s)	Late Cretaceous (Campanian)	29–33 ft (9–10 m)	Slightly smaller than T. rex	Alberta, Canada; Montana, USA	Deep snout, robust build; possible ancestor of Tyrannosaurus
Gorgosaurus libratus	“Fierce lizard” (balanced)	Late Cretaceous (Campanian)	26–30 ft (8–9 m)	Smaller than T. rex	Alberta, Canada; Montana, USA	More slender and faster than Daspletosaurus; many growth stages known
Tarbosaurus bataar	“Alarming lizard” (hero)	Late Cretaceous (Maastrichtian)	33–40 ft (10–12 m)	Almost T. rex–sized	Mongolia, China	Asian version of Tyrannosaurus; smaller arms even than T. rex
Tyrannosaurus rex	“Tyrant lizard king”	Late Cretaceous (Maastrichtian)	39–43 ft (12–13 m)	Largest land predator ever	Western North America	Massive skull (5 ft long), bone-crushing bite (up to 12,800 lbs force); tiny arms; dozens of specimens

Genus List for Holtz (2026): Sauropodomorphs

Genus & Species	Name Meaning	Age	Time	Diet	Height	Length	Weight	Author	Region / Formation	Cartoon All-Stars's Comments/Facts
INFRAORDER PROSAUROPODA
Herrerasaurus ischigualastensis	"Herrera's lizard"	231 Ma	Late Triassic	Carnivore	1.2 m	6.0 m	350 kg	Reig (1963)	Argentina (Ischigualasto)	Optimus Prime: "A primitive basal archosaur. While its classification mimics a theropod, its pelvic structure points to the dawn of the long-neck lineage."
"Smurfette smurfensis"	"Smurfette's creature"	Modern	Cinematic	Omnivore	0.2 m	0.5 m	2 kg	Paramount (2025)	Smurf Village / CGI Realm	Smurfette: "Hey, wait a minute! I remember this little guy from our 2025 movie! He’s blue, adorable, and loves Smurfberries, but he’s definitely a cinematic fiction, not a real Triassic fossil!"
Staurikosaurus pricei	"Southern Cross lizard"	233 Ma	Late Triassic	Carnivore	0.8 m	2.2 m	30 kg	Colbert (1970)	Brazil (Santa Maria Fm)	Bugs Bunny: "Another ancient lightweight, doc! He was running around on two legs eating bugs and small lizards long before anyone grew a giant neck."
Anchisaurus polyzelus	"Near lizard"	195 Ma	Early Jurassic	Herbivore / Omnivore	1.0 m	2.5 m	30 kg	Marsh (1885)	USA (Portland Fm)	Brainy Smurf: "A textbook transitional genus! Statistically, its delicate hands kept the ability to grasp plants, even as it started walking on all fours."
Efraasia minor	"Fraas's lizard"	210 Ma	Late Triassic	Herbivore	1.0 m	6.5 m	300 kg	Galton (1973)	Germany (Löwenstein Fm)	Papa Smurf: "A gentle early browser. He was long and slender, easily reaching the low Triassic ferns that other reptiles couldn't touch."
Eoraptor lunensis	"Dawn thief"	231 Ma	Late Triassic	Omnivore	0.3 m	1.0 m	10 kg	Sereno (1993)	Argentina (Ischigualasto)	Alvin: "He looks like a tiny meat-eater, but look closely at his teeth! He’s got leaf-shaped teeth in the back, making him the grandfather of all giant plant-eaters!"
Thecodontosaurus antiquus	"Socket-toothed lizard"	205 Ma	Late Triassic	Herbivore	0.4 m	1.2 m	11 kg	Morris (1843)	UK (Magnesian Conglomerate)	Thea Stilton: "Discovered right near Bristol! A very neat, cat-sized early herbivore with beautifully serrated teeth for shredding leaves. Fabumouse!"
Massospondylus kaalae	"Longer vertebra"	200 Ma	Early Jurassic	Herbivore	1.5 m	4.0 m	1,000 kg	Owen (1854)	South Africa (Elliot Fm)	Winnie the Pooh: "Fossils show these momma dinosaurs took very good care of their round little nests, and the babies were born without teeth!"
Mussaurus patagonicus	"Mouse lizard"	215 Ma	Late Triassic	Herbivore	1.2 m	6.0 m	1,000 kg	Bonaparte (1979)	Argentina (El Tranquilo Fm)	Geronimo Stilton: "Named 'mouse lizard' because the first fossils found were tiny, squeak-sized hatchlings that could fit in a human hand! Tremendous!"
Plateosaurus gracilis	"Broad lizard"	210 Ma	Late Triassic	Herbivore	2.5 m	7.0 m	4,000 kg	von Meyer (1837)	Central Europe	Daffy Duck: "The heavyweight of the Triassic! He could stand up on his hind legs to grab the high leaves, hogging all the food! It's despicable!"
Riojasaurus incertus	"La Rioja lizard"	210 Ma	Late Triassic	Herbivore	3.0 m	10.0 m	3,000 kg	Bonaparte (1969)	Argentina (Los Colorados)	Michelangelo: "This dude was so heavy he couldn't even pull off a radical bipedal wheelie anymore. Four-on-the-floor full-time cruising!"
INFRAORDER SAUROPODA
Barapasaurus tagorei	"Big-legged lizard"	183 Ma	Early Jurassic	Herbivore	4.0 m	14.0 m	7,000 kg	Jain (1975)	India (Kota Formation)	Dawn: "One of the earliest true sauropods! He has long, columnar legs like a modern elephant to help support all that heavy weight."
Cetiosaurus oxoniensis	"Whale lizard"	167 Ma	Middle Jurassic	Herbivore	4.5 m	16.0 m	11,000 kg	Owen (1841)	UK (Forest Marble Fm)	Bugs Bunny: "When they first found his massive bones in England, doc, they thought they belonged to a giant ocean-going whale!"
Nigersaurus taqueti	"Niger lizard"	115 Ma	Early Cretaceous	Herbivore	2.0 m	9.0 m	2,000 kg	Sereno (1999)	Niger (Elrhaz Formation)	Garfield: "A dinosaur shaped like a vacuum cleaner. His mouth is completely flat and packed with 500 teeth for mowing lawns. I need one."
Brachiosaurus altithorax	"Arm lizard"	150 Ma	Late Jurassic	Herbivore	14.0 m	22.0 m	35,000 kg	Riggs (1903)	USA / India (Morrison / Kota Fm)	Optimus Prime: "A triumph of biological engineering. With forelimbs longer than its hind limbs, its frame was optimized for high-canopy browsing."
Sauroposeidon proteles	"Lizard earthquake god"	112 Ma	Early Cretaceous	Herbivore	16.5 m	32.0 m	50,000 kg	Wedel (2000)	USA (Antlers Formation)	Tigger: "He’s so tall he could look into a sixth-story window! Talk about a sky-high bouncer! Hoo-hoo-hoo!"
Camarasaurus supremus	"Chambered lizard"	150 Ma	Late Jurassic	Herbivore	9.0 m	18.0 m	20,000 kg	Cope (1877)	USA (Morrison Fm)	Michelangelo: "The most common heavy-lifter of the Jurassic! He’s got a blunt, boxy skull with big spoon-shaped teeth for crushing tough salad!"
Euhelopus zdanskyi	"True marsh foot"	120 Ma	Early Cretaceous	Herbivore	4.0 m	15.0 m	4,000 kg	Wiman (1929)	China (Mengyin Formation)	Thea Stilton: "He has an exceptionally long neck even for a sauropod, with highly elongated cervical vertebrae. Incredibly stylish!"
Opisthocoelicaudia skarzynskii	"Rear cavity tail"	70 Ma	Late Cretaceous	Herbivore	3.5 m	12.0 m	10,000 kg	Maleev (1977)	Mongolia (Nemegt Fm)	Bluey: "His name is an absolute tongue-twister! He’s got super-strong tail joints that mean he could sit back on his tail like a stool, for real life!"
Apatosaurus ajax	"Deceptive lizard"	152 Ma	Late Jurassic	Herbivore	7.0 m	25.0 m	23,000 kg	Marsh (1877)	USA (Morrison Fm)	Garfield: "Famously confused with Brontosaurus for decades. Either way, it’s a massive couch potato that weighed as much as four elephants."
Dicraeosaurus sattleri	"Forked lizard"	150 Ma	Late Jurassic	Herbivore	3.0 m	12.0 m	4,000 kg	Janensch (1914)	Tanzania (Tendaguru Fm)	Alvin: "He’s got a short neck for a sauropod, but his neck and back spines split into double-pronged forks all the way down!"
Diplodocus hallorum	"Double beam"	154 Ma	Late Jurassic	Herbivore	6.5 m	32.0 m	15,000 kg	Marsh (1878)	USA (Morrison Fm)	Bugs Bunny: "He’s built like a suspension bridge, doc! He used his long, whip-like tail to crack the air and scare away pesky predators."
Mamenchisaurus sinocanadorum	"Mamenchi ferry lizard"	160 Ma	Late Jurassic	Herbivore	17.0 m	26.0 m	25,000 kg	Young (1954)	China (Shishugou Fm)	Brainy Smurf: "Holds the record for the longest neck relative to body size! Statistically, its neck alone accounts for over half of its total length!"
Supersaurus vivianae	"Super lizard"	150 Ma	Late Jurassic	Herbivore	20.5 m	39.0 m	40,000 kg	Jensen (1985)	USA (Morrison Fm)	Optimus Prime: "Recent comprehensive skeletal structural analyses confirm Supersaurus as one of the longest valid terminal land vertebrates known to science."
Alamosaurus sanjuanensis	"Ojo Alamo lizard"	66 Ma	Late Cretaceous	Herbivore	8.0 m	26.0 m	38,000 kg	Gilmore (1922)	USA (Javelina Formation)	Dawn: "The very last of the giant long-necks in North America. He lived right alongside Tyrannosaurus rex!"
Dreadnoughtus schrani	"Fears nothing"	77 Ma	Late Cretaceous	Herbivore	9.0 m	26.0 m	49,000 kg	Lacovara (2014)	Argentina (Cerro Fortaleza)	Optimus Prime: "An armored dreadnought of the flesh. Its colossally dense skeletal mass indicates it reached near-immunity from predation upon adulthood."
Saltasaurus loricatus	"Lizard from Salta"	70 Ma	Late Cretaceous	Herbivore	3.0 m	8.5 m	2,500 kg	Bonaparte (1980)	Argentina (Lecho Formation)	Tigger: "A long-neck with a twist! His back is covered in bumpy bony armor buttons and spikes for extra protection! Hoo-hoo-hoo!"

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Smurfette	“Little blue fictional character” (from Peyo’s The Smurfs)	Modern (1958–present)	~3 Smurfs high (≈ 30 cm)	~3 apples	Comic books, cartoons, movies	Not a real dinosaur. Fictional character created by Peyo in 1958. Zero scientific validity. Sometimes jokingly inserted into fake dinosaur lists. No fossils, no Triassic origin, no relation to Herrerasauridae.

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Herrerasaurus ischigualastensis	“Herrera’s lizard” (from Ischigualasto)	Late Triassic (Carnian)	13–20 ft (4–6 m)	Grizzly bear-sized	Argentina	Primitive theropod-like predator; sliding jaw joint, five-fingered hands; not a true prosauropod
Staurikosaurus pricei	“Southern Cross lizard” (Price’s)	Late Triassic (Carnian)	~7 ft (2.1 m)	Large dog-sized	Brazil	Very primitive; only partial skeleton known; possibly same as Herrerasaurus
Anchisaurus polyzelus	“Near lizard” (many girdles)	Early Jurassic (Pliensbachian)	7–10 ft (2–3 m)	Deer-sized	Connecticut, USA	Formerly “Yaleosaurus”; small, facultatively bipedal
Efraasia minor	“Efraas lizard” (small)	Late Triassic (Norian)	~10–13 ft (3–4 m)	Cow-sized	Germany	Formerly “Sellosaurus” in part; long neck and tail
Nyasasaurus parringtoni	“Lake Nyasa lizard” (Parrington’s)	Middle Triassic (Anisian)	~6–10 ft (2–3 m)	Large dog to cow-sized	Tanzania	Possibly the oldest known dinosaur or very close relative; very fragmentary
Thecodontosaurus antiquus	“Socket-tooth lizard” (ancient)	Late Triassic (Rhaetian)	4–10 ft (1.2–3 m)	Deer-sized	England, Wales	“Bristol dinosaur”; small, hundreds of individuals in fissure fills
Lufengosaurus huenei	“Lufeng lizard” (von Huene’s)	Early Jurassic (Hettangian–Sinemurian)	20 ft (6 m)	Rhino-sized	Yunnan, China	First relatively complete prosauropod mounted; broad hands
Massospondylus kaalae	“Massive vertebra” (from Kaala)	Early Jurassic (Hettangian–Pliensbachian)	13–20 ft (4–6 m)	Rhino-sized	South Africa, Zimbabwe, USA	Nests and embryos known; long arms, five-fingered hands; possibly omnivorous
Coloradisaurus brevis	“Colorado lizard” (short)	Late Triassic (Norian)	~13 ft (4 m)	Cow-sized	Argentina	Formerly “Coloradia”; close to Massospondylus
Mussaurus patagonicus	“Mouse lizard” (from Patagonia)	Late Triassic (Norian)	Adults ~20 ft (6 m)	Rhino-sized	Argentina	Known from hatchlings at first (only 8–15 in long); adults much larger
Plateosaurus gracilis	“Flat lizard” (slender)	Late Triassic (Norian–Rhaetian)	13–33 ft (4–10 m)	Cow to elephant-sized	Germany, France, Switzerland	One of the best-known prosauropods; hundreds of skeletons; facultatively bipedal
Riojasaurus incertus	“Rioja lizard” (uncertain)	Late Triassic (Norian)	33 ft (10 m)	Elephant-sized	Argentina	Very long neck and tail; massive limbs; among the last prosauropods

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Amygdalodon patagonicus	“Almond tooth” (from Patagonia)	Middle Jurassic (Toarcian–Bajocian)	~50 ft (15 m)	Elephant-sized	Argentina	Very primitive; teeth shaped like almonds; among the earliest Middle Jurassic sauropods
Cetiosaurus oxoniensis	“Whale lizard” (from Oxford)	Middle Jurassic (Bajocian–Callovian)	52–60 ft (16–18 m)	Several elephants	England	First sauropod scientifically described (1841); once thought whale-like because of size
Haplocanthosaurus delfsi	“Simple-spined lizard” (Delfs’)	Late Jurassic (Kimmeridgian)	~50–70 ft (15–21 m)	Multi-elephant	Colorado, USA	Very simple neural spines; once considered primitive, now a basal diplodocoid
Mamenchisaurus sinocanadorum	“Mamenchi lizard” (China-Canada)	Late Jurassic (Oxfordian–Tithonian)	85–115 ft (26–35 m)	Giraffe-necked giant	Sichuan, China	Longest neck of any animal (up to 19 neck vertebrae); “Mamenchisaurus-type” neck
Patagosaurus fariasi	“Patagonia lizard” (Farias’)	Middle Jurassic (Callovian)	~50–60 ft (15–18 m)	Several elephants	Argentina	Relatively complete; primitive eusauropod with somewhat spoon-shaped teeth
Rebbachisaurus garasbae	“Rebbach lizard” (from Garas)	Early–Late Cretaceous (Cenomanian)	~66 ft (20 m)	Elephant-sized	Morocco	Tall neural spines formed a sail; last of the diplodocoid family
Nigersaurus taqueti	“Niger lizard” (Taquet’s)	Early Cretaceous (Aptian–Albian)	30–50 ft (9–15 m)	Elephant-sized	Niger	“Mesozoic cow”; vacuum-cleaner mouth with 600+ replaceable teeth; rebbachisaurid
Astrodon johnstoni	“Star tooth” (Johnston’s)	Early Cretaceous (Aptian–Albian)	~50–60 ft (15–18 m)	Multi-elephant	Maryland, Texas, USA	Official Maryland state dinosaur; once called “Pleurocoelus”
Brachiosaurus altithorax	“Arm lizard” (deep chest)	Late Jurassic (Kimmeridgian–Tithonian)	75–85 ft (23–26 m)	10–15 elephants	Colorado, USA; Tanzania, Portugal	Front legs longer than hind legs; high shoulders; giraffe-like stance
Nemegtosaurus mongoliensis	“Nemegt lizard”	Late Cretaceous (Maastrichtian)	~50 ft (15 m) (skull only)	Known Elephant	Mongolia	Titanosaurian skull very similar to Saltasaurus; originally thought diplodocoid
Sauroposeidon proteles	“Earthquake-god lizard” (last of its kind)	Early Cretaceous (Aptian–Albian)	90–110 ft (27–34 m)	Tallest dinosaur ever	Oklahoma, USA	Neck possibly reached 55–60 ft high; brachiosaurid with extremely elongated vertebrae
Camarasaurus supremus	“Chambered lizard” (the supreme)	Late Jurassic (Kimmeridgian–Tithonian)	50–75 ft (15–23 m)	10–20 tons	Colorado, Utah, Wyoming, USA	Short, boxy skull; most common Morrison sauropod; many complete skeletons and juveniles
Euhelopus zdanskyi	“Good marsh foot” (Zdansky’s)	Early Cretaceous (Berriasian?)	~50 ft (15 m)	Multi-elephant	Shandong, China	Very long neck; once thought very primitive, now early titanosauriform
Omeisaurus fuxiensis	“Omei lizard” (after Fu Xi)	Middle–Late Jurassic (Callovian–Oxfordian)	50–66 ft (15–20 m)	Several elephants	Sichuan, China	Extremely long neck (17 vertebrae); Chinese “Mamenchisaurus-like” form
Opisthocoelicaudia skarzynskii	“Posterior cavity tail” (Skarżyński’s)	Late Cretaceous (Maastrichtian)	~40 ft (12 m)	Elephant-sized	Mongolia	Short tail with opisthocoelous (back-concave) vertebrae; titanosaur, possible saltasaurid

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Aegyptosaurus baharijensis	“Egyptian lizard” (from Bahariya)	Late Cretaceous (Cenomanian)	~50 ft (15 m)	Multi-elephant	Egypt, Niger	Known from very fragmentary remains; lived with Spinosaurus
Antarctosaurus giganteus	“Southern lizard” (giant)	Late Cretaceous (Campanian)	~60–100 ft (18–30 m)	Possibly 80+ tons	Argentina, Uruguay, India	Extremely large femur known; name is misleading – not from Antarctica
Argentinosaurus huinculensis	“Argentina lizard” (from Huincul)	Late Cretaceous (Cenomanian–Turonian)	100–115 ft (30–35 m)	70–100 tons	Patagonia, Argentina	Among the largest known land animals; vertebrae and limb bones only
Campylodoniscus ameghinoi	“Curved tooth” (Ameghino’s)	Late Cretaceous (Campanian?)	~50–65 ft (15–20 m)	Multi-elephant	Argentina	Known only from incomplete skull and limb material; titanosaur
Dreadnoughtus schrani	“Fears nothing” (Schran’s)	Late Cretaceous (Campanian)	~85 ft (26 m)	~59 tons	Patagonia, Argentina	Post-2011 addition: most complete giant titanosaur skeleton known
Laplatasaurus araukanicus	“La Plata lizard” (Araucanian)	Late Cretaceous (Campanian)	~60 ft (18 m)	Multi-elephant	Argentina, India, Madagascar	Known from limb bones and vertebrae; once confused with Titanosaurus
Puertasaurus reuili	“Puerta’s lizard” (Reuil’s)	Late Cretaceous (Cenomanian)	~100–130 ft (30–40 m)	80–100+ tons	Patagonia, Argentina	Second-largest known sauropod; huge neck vertebra (5.5 ft wide)
Alamosaurus sanjuanensis	“Alamo lizard” (from San Juan)	Late Cretaceous (Maastrichtian)	80–100+ ft (24–30+ m)	50–80 tons	New Mexico, Texas, Utah, USA	Only North American sauropod after 100-million-year absence; huge bonebeds
Saltasaurus loricatus	“Salta lizard” (armored)	Late Cretaceous (Campanian–Maa)	40 ft (12 m)	Elephant-sized	Argentina	First armored sauropod discovered; osteoderms like a tank; nests and eggs known
Apatosaurus ajax	“Deceptive lizard” (Ajax’s)	Late Jurassic (Kimmeridgian–Tithonian)	70–75 ft (21–23 m)	18–30 tons	Colorado, Utah, Wyoming, USA	Formerly “Brontosaurus”; long whip-like tail; dozens of skeletons
Barosaurus lentus	“Heavy lizard” (slow)	Late Jurassic (Kimmeridgian–Tithonian)	80–148 ft (24–45 m)	20–60 tons	Utah, South Dakota, USA; Tanzania	Extremely long neck (up to 17 vertebrae); reared up like Brachiosaurus
Brontosaurus excelsus	“Thunder lizard” (noble)	Late Jurassic (Kimmeridgian–Tithonian)	~72 ft (22 m)	~20–30 tons	Utah, Wyoming, USA	Restored as valid genus in 2015 (post-2011); broader neck than Apatosaurus
Dicraeosaurus sattleri	“Two-forked lizard” (Sattler’s)	Late Jurassic (Kimmeridgian–Tithonian)	~45–65 ft (14–20 m)	Multi-elephant	Tendaguru, Tanzania	Short neck with tall double neural spines; “giraffe-necked” opposite
Diplodocus hallorum	“Double beam” (Hall’s)	Late Jurassic (Kimmeridgian–Tithonian)	100–115 ft (30–35 m)	20–40 tons	New Mexico, USA	Formerly “Seismosaurus”; longest known dinosaur; double-beamed chevrons under tail
Supersaurus vivianae	“Super lizard” (Vivian’s)	Late Jurassic (Kimmeridgian–Tithonian)	105–128 ft (32–39 m)	35–50 tons	Colorado, Wyoming, USA	Among the longest sauropods; huge shoulder blade (8.5 ft long)

ORDER ORNITHISCHIA (“bird-hipped” dinosaurs)

└─ Suborder Cerapoda

├─ Infraorder Ornithopoda

├─ Fabrosauridae

├─ Lesothosaurus diagnosticus

└─ Scutellosaurus lawleri

├─ Heterodontosauridae

├─ Echinodon becklesii

├─ Heterodontosaurus tucki

└─ Pisanosaurus mertii

├─ Hypsilophodontidae

├─ Callovosaurus leedsi

├─ Dryosaurus elderae

├─ Hypsilophodon foxii

├─ Nanosaurus agilis

├─ Parksosaurus warreni

└─ Thescelosaurus garbanii

├─ Iguanodontidae

├─ Camptosaurus dispar

├─ Iguanodon bernissartensis

├─ Mantellisaurus atherfieldensis

├─ Muttaburrasaurus langdoni

├─ Ouranosaurus nigeriensis

├─ Probactrosaurus gobiensis

└─ Tenontosaurus dossi

└─ Hadrosauridae

├─ Brachylophosaurus canadensis

├─ Corythosaurus casuarius

├─ Edmontosaurus regalis

├─ Hadrosaurus foulkii

├─ Hypacrosaurus stebingeri

├─ Kritosaurus navajovius

├─ Lambeosaurus magnicristatus

├─ Maiasaura peeblesorum

├─ Olorotitan arharensis

├─ Parasaurolophus walkeri

├─ Prosaurolophus maximus

├─ Saurolophus osborni

├─ Shantungosaurus giganteus

└─ Tsintaosaurus spinorhinus

└─ Infraorder Ceratopsia

├─ Pachycephalosauridae

├─ Homalocephale calathocercos

├─ Pachycephalosaurus wyomingensis

├─ Prenocephale prenes

└─ Stegoceras validum

├─ Psittacosauridae · Psittacosaurus meileyingensis

├─ Protoceratopidae

├─ Bagaceratops rozhdestvenskyi

├─ Leptoceratops gracilis

├─ Microceratus gobiensis

├─ Montanoceratops cerorhynchus

└─ Protoceratops hellenikorhinus

└─ Ceratopidae

├─ Anchiceratops ornatus

├─ Arrhinoceratops brachyops

├─ Avaceratops lammersi

├─ Centrosaurus apertus

├─ Chasmosaurus belli

├─ Nasutoceratops titusi

├─ Pachyrhinosaurus lakustai

├─ Pentaceratops sternbergii

├─ Styracosaurus ovatus

├─ Torosaurus latus

└─ Triceratops horridus

└─ Suborder Thyreophora

├─ Infraorder Stegosauria

├─ Huayangosauridae

├─ Chungkingosaurus jiangbeiensis

├─ Huayangosaurus taibaii

├─ Lexovisaurus durobrivensis

└─ Tuojiangosaurus multispinus

├─ Stegosauridae

├─ Dacentrurus armatus

├─ Kentrosaurus aethiopicus

├─ Stegosaurus stenops

└─ Wuerhosaurus ordosensis

└─ Scelidosauridae · Scelidosaurus harrisonii

└─ Infraorder Ankylosauria

├─ Nodosauridae

├─ Hylaeosaurus armatus

├─ Nodosaurus textilis

├─ Panoplosaurus mirus

├─ Polacanthus foxii

├─ Sauropelta edwardsorum

├─ Silvisaurus condrayi

└─ Struthiosaurus transylvanicus

└─ Ankylosauridae

├─ Ankylosaurus magniventris

├─ Euoplocephalus tutus

├─ Saichania chulsanensis

└─ Talarurus plicatospineus

Genus List for Holtz (2026): Cerapods

Genus & Species	Name Meaning	Age	Time	Diet	Height	Length	Weight	Author	Region / Formation	Cartoon All-Stars's Comments/Facts
INFRAORDER ORNITHOPODA
Lesothosaurus diagnosticus	"Lizard from Lesotho"	195 Ma	Early Jurassic	Herbivore / Omnivore	0.4 m	2.0 m	20 kg	Galton (1978)	South Africa (Elliot Fm)	Bugs Bunny: "A tiny, basic starter-pack dinosaur, doc! Long legs built for running away from early Jurassic trouble."
Scutellosaurus lawleri	"Little shielded lizard"	196 Ma	Early Jurassic	Herbivore	0.5 m	1.2 m	15 kg	Colbert (1981)	USA (Kayenta Fm)	Brainy Smurf: "Though grouped here historically, its hundreds of flat bony armor plates show it was actually a basal thyreophoran!"
Echinodon becklesii	"Prickly tooth"	140 Ma	Early Cretaceous	Herbivore / Omnivore	0.2 m	0.6 m	1 kg	Owen (1861)	UK (Purbeck Group)	Winnie the Pooh: "A very small hedge-hoggy friend with sharp little teeth. He could fit right inside a small hunny pot."
Heterodontosaurus tucki	"Different-toothed lizard"	190 Ma	Early Jurassic	Herbivore / Omnivore	0.4 m	1.2 m	3 kg	Crompton (1962)	South Africa (Elliot Fm)	Daffy Duck: "He’s got rodent incisors, grinding cheek teeth, AND sharp fangs! Pick a mouth design and stick with it! It's despicable!"
Pisanosaurus mertii	"Pisano's lizard"	228 Ma	Late Triassic	Herbivore	0.3 m	1.0 m	5 kg	Casamiquela (1967)	Argentina (Ischigualasto)	Papa Smurf: "A very old, mysterious little reptile. For a long time, we thought he was the very first bird-hipped dinosaur!"
Callovosaurus leedsi	"Callovian lizard"	163 Ma	Middle Jurassic	Herbivore	1.0 m	2.5 m	120 kg	Galton (1980)	UK (Oxford Clay)	Thea Stilton: "One of the earliest known iguanodontians! A sleek bipedal browser with highly refined leg mechanics. Fabumouse!"
Dryosaurus elderae	"Oak lizard"	150 Ma	Late Jurassic	Herbivore	1.5 m	3.0 m	100 kg	Carpenter (2018)	USA (Morrison Fm)	Alvin: "Super fast and totally toothless in the very front of his beak! He spent his days dodging giant Allosaurus packs!"
Hypsilophodon foxii	"High-crested tooth"	125 Ma	Early Cretaceous	Herbivore	0.6 m	1.8 m	20 kg	Huxley (1869)	UK (Wessex Fm)	Geronimo Stilton: "Early scientists mistakenly thought this agile runner climbed up trees like a modern tree-kangaroo! How absurd!"
Nanosaurus agilis	"Small agile lizard"	150 Ma	Late Jurassic	Herbivore	0.5 m	2.0 m	10 kg	Marsh (1877)	USA (Morrison Fm)	Michelangelo: "This little dude has gone through like three different name changes, but he’s a classic tiny Jurassic speedster!"
Parksosaurus warreni	"Parks's lizard"	70 Ma	Late Cretaceous	Herbivore	1.0 m	2.5 m	45 kg	Sternberg (1937)	Canada (Horseshoe Canyon)	Dawn: "A sturdy, late-surviving little runner that lived underneath the shadow of giant duck-bills and tyrannosaurs."
Thescelosaurus garbanii	"Wonderful lizard"	66 Ma	Late Cretaceous	Herbivore	1.2 m	3.6 m	300 kg	Morris (1976)	USA (Hell Creek Fm)	Optimus Prime: "A heavy, stocky terminal ornithopod. Exceptional fossils reveal thick, armored scales on its body for predator defense."
Camptosaurus dispar	"Flexible lizard"	150 Ma	Late Jurassic	Herbivore	2.0 m	6.0 m	800 kg	Marsh (1879)	USA (Morrison Fm)	Garfield: "He could walk on two legs or four, and had a heavy beak for eating woodsy twigs. Sounds like a lot of physical labor to me."
Iguanodon bernissartensis	"Iguana tooth"	125 Ma	Early Cretaceous	Herbivore	4.2 m	11.8 m	4,500 kg	Boulenger (1881)	Belgium (Sainte-Barbe Clays)	Optimus Prime: "An absolute classic of paleontology. Armed with a heavy, cone-shaped thumb spike used as a close-quarters weapon."
Mantellisaurus atherfieldensis	"Mantell's lizard"	125 Ma	Early Cretaceous	Herbivore	2.2 m	7.0 m	750 kg	Paul (2007)	UK (Vectis Fm)	Bluey: "He’s a much lighter, skinnier cousin of Iguanodon, built for running fast through ancient forest tracks, for real life!"
Muttaburrasaurus langdoni	"Muttaburra lizard"	103 Ma	Early Cretaceous	Herbivore / Omnivore	3.0 m	8.0 m	2,800 kg	Bartholomai (1981)	Australia (Mackunda Fm)	Tigger: "He’s got a giant hollow blow-up nose bulb! Maybe he used it to make super-duper loud honking noises! Hoo-hoo-hoo!"
Ouranosaurus nigeriensis	"Brave lizard"	112 Ma	Early Cretaceous	Herbivore	3.0 m	7.0 m	2,200 kg	Taquet (1976)	Niger (Elrhaz Fm)	Michelangelo: "Dude, this duck-bill relative has a radical sail on its back made of tall spines, just like a Spinosaurus!"
Probactrosaurus gobiensis	"Before Bactrosaurus"	92 Ma	Late Cretaceous	Herbivore	2.5 m	5.5 m	1,200 kg	Rozhdestvensky (1966)	China (Dashuiguo Fm)	Brainy Smurf: "A crucial evolutionary stepping stone! Statistically, its teeth show the exact transition into the complex hadrosaur battery."
Tenontosaurus dossi	"Sinew lizard"	110 Ma	Early Cretaceous	Herbivore	2.3 m	6.5 m	1,000 kg	Winkler (1997)	USA (Twin Mountains Fm)	Bugs Bunny: "He’s got a tail that takes up over half his entire length, doc! Famously found tangled up in fossils with raptor packs."
Bactrosaurus johnsoni	"Club lizard"	90 Ma	Late Cretaceous	Herbivore	2.0 m	6.0 m	1,500 kg	Gilmore (1933)	Mongolia (Iren Dabasu Fm)	Winnie the Pooh: "An early duck-bill who didn't have a hollow crest yet, just a flat, friendly head for thinking quiet thoughts."
Brachylophosaurus canadensis	"Short-crested lizard"	78 Ma	Late Cretaceous	Herbivore	2.8 m	9.0 m	3,000 kg	Sternberg (1953)	Canada (Dinosaur Park)	Thea Stilton: "Famous for 'Leonardo,' a stunning mummy fossil preserving complete skin, scales, and even its last plant meal! Splendid!"
Corythosaurus casuarius	"Helmet lizard"	77 Ma	Late Cretaceous	Herbivore	4.0 m	9.0 m	3,800 kg	Brown (1914)	Canada / USA (Dinosaur Park / Lance)	Daffy Duck: "A giant hollow dinner-plate crest on top of his skull! He looked like he was wearing a fancy helmet! It's despicable!"
Edmontosaurus regalis	"Edmonton lizard"	73 Ma	Late Cretaceous	Herbivore	4.0 m	12.0 m	4,000 kg	Lambe (1917)	Canada / USA (Horseshoe Canyon / Lance)	Optimus Prime: "A true giant of the Hadrosauridae. Mummified remains reveal it possessed a fleshy, rooster-like comb crest on its head."
Hadrosaurus foulkii	"Bulky lizard"	80 Ma	Late Cretaceous	Herbivore	3.5 m	8.0 m	3,000 kg	Leidy (1858)	USA (Woodbury Fm)	Alvin: "The very first dinosaur skeleton ever put on public display in North America! The founding father of the duck-bill club!"
Hypacrosaurus stebingeri	"Near the highest lizard"	75 Ma	Late Cretaceous	Herbivore	3.8 m	9.0 m	3,400 kg	Horner (1994)	USA (Two Medicine Fm)	Dawn: "Fossils include gorgeous nests with eggs and embryos, helping us learn how fast these gentle giants grew up!"
Kritosaurus navajovius	"Separated lizard"	74 Ma	Late Cretaceous	Herbivore	3.5 m	9.0 m	3,500 kg	Brown (1910)	USA (Kirtland Fm)	Geronimo Stilton: "Recognized by a highly distinct, humped Roman nose ridge between its large eyes. Very sophisticated looking!"
Lambeosaurus magnicristatus	"Lambe's lizard"	75 Ma	Late Cretaceous	Herbivore	4.2 m	9.5 m	4,000 kg	Sternberg (1935)	Canada (Dinosaur Park)	Tigger: "His crest looks like a giant hatchet pointing backward and forward! The crest-iest, loudest honker in the west! Hoo-hoo-hoo!"
Maiasaura peeblesorum	"Good mother lizard"	76 Ma	Late Cretaceous	Herbivore	2.5 m	9.0 m	3,000 kg	Horner (1979)	USA (Two Medicine Fm)	Bluey: "The ultimate super-mum! Found in massive nesting colonies with thousands of babies, taking care of them all, for real life!"
Olorotitan arharensis	"Gigantic swan"	70 Ma	Late Cretaceous	Herbivore	4.5 m	12.0 m	4,500 kg	Godefroit (2003)	Russia (Udurchukan Fm)	Dawn: "He has a spectacular, backward-pointing crest shaped exactly like a giant fan or a boat paddle on his head!"
Parasaurolophus walkeri	"Near crested lizard"	76 Ma	Late Cretaceous	Herbivore	4.0 m	10.0 m	3,500 kg	Parks (1922)	Canada (Dinosaur Park)	Optimus Prime: "Its 6-foot long tubular skull crest acted as a resonant acoustic chamber, generating low-frequency sonic communications."
Prosaurolophus maximus	"Before Saurolophus"	76 Ma	Late Cretaceous	Herbivore	3.0 m	9.0 m	3,500 kg	Brown (1916)	Canada (Dinosaur Park)	Garfield: "A massive duck-bill with a small, solid bony ridge right in front of its eyes. Good for minor head-butting, I guess."
Saurolophus osborni	"Crested lizard"	70 Ma	Late Cretaceous	Herbivore	3.5 m	9.8 m	3,800 kg	Brown (1912)	Canada (Horseshoe Canyon)	Bugs Bunny: "He’s got a straight, spike-like crest that pokes out the back of his head like a fancy ponytail, doc!"
Shantungosaurus giganteus	"Shandong lizard"	75 Ma	Late Cretaceous	Herbivore	7.0 m	16.5 m	15,000 kg	Hu (1973)	China (Wangshi Group)	Optimus Prime: "The largest non-sauropod vegetarian in history. A colossal hadrosaur possessing a skeletal bulk matching many sauropods."
Tsintaosaurus spinorhinus	"Qingdao lizard"	70 Ma	Late Cretaceous	Herbivore	3.5 m	10.0 m	4,000 kg	Young (1958)	China (Wangshi Group)	Michelangelo: "Dude used to be drawn with a single unicorn horn on his head, but new fossils show it was part of a big hollow crest sail!"
INFRAORDER CERATOPSIA
Dracorex hogwartsia	"Dragon king of Hogwarts"	66 Ma	Late Cretaceous	Herbivore / Omnivore	1.2 m	3.0 m	200 kg	Bakker (2006)	USA (Hell Creek Fm)	Alvin: "Named after Harry Potter's school! He’s covered in spiky horns and lumps but has a totally flat forehead!"
Homalocephale calathocercos	"Even head"	70 Ma	Late Cretaceous	Herbivore	0.8 m	1.8 m	40 kg	Maryańska (1974)	Mongolia (Nemegt Fm)	Thea Stilton: "A beautifully preserved flat-headed pachycephalosaur with an exceptionally broad pelvis. Very sleek and unique! Fabumouse!"
Pachycephalosaurus wyomingensis	"Thick-headed lizard"	66 Ma	Late Cretaceous	Herbivore / Omnivore	2.0 m	4.5 m	450 kg	Brown (1943)	USA (Hell Creek, Lance Fm)	Michelangelo: "The bowling ball king! This dude has a solid bone dome on his head that’s 9 inches thick! Totally radical!"
Prenocephale prenes	"Sloping head"	70 Ma	Late Cretaceous	Herbivore	1.0 m	2.4 m	130 kg	Maryańska (1974)	Mongolia (Nemegt Fm)	Brainy Smurf: "A high, round-domed pachycephalosaur. Statistically, its skull bone architecture was built to absorb serious structural impacts."
Stegoceras validum	"Horn roof"	75 Ma	Late Cretaceous	Herbivore	0.8 m	2.0 m	40 kg	Lambe (1902)	Canada (Dinosaur Park)	Winnie the Pooh: "A small, gentle dome-head about the size of a goat. He has a little shelf of tiny bumps all around the back of his skull."
Stygimoloch spinifer	"Styx demon"	66 Ma	Late Cretaceous	Herbivore / Omnivore	1.5 m	3.0 m	200 kg	Galton (1983)	USA (Hell Creek Fm)	Daffy Duck: "Giant clusters of long spikes shooting out the back of his dome! He looks like an angry pincushion! It's despicable!"
Psittacosaurus meileyingensis	"Parrot lizard"	120 Ma	Early Cretaceous	Herbivore	0.8 m	2.0 m	30 kg	Sereno (1988)	China (Jiufotang Fm)	Bluey: "The parrot dinosaur! One famous fossil even has a row of long, bristly quills running down its tail like a porcupine, for real life!"
Bagaceratops rozhdestvenskyi	"Small horned face"	72 Ma	Late Cretaceous	Herbivore	0.4 m	1.0 m	20 kg	Maryańska (1975)	Mongolia (Barun Goyot Fm)	Geronimo Stilton: "A miniature primitive horned face with a very tiny nasal bump and a compact neck frill. Quite charming!"
Leptoceratops gracilis	"Slender horned face"	66 Ma	Late Cretaceous	Herbivore	0.8 m	2.0 m	100 kg	Brown (1914)	Canada (Scollard Fm)	Garfield: "A hornless ceratopsian that didn't bother growing big facial accessories. Staid completely old-school, avoiding all trends."
Microceratus gobiensis	"Small horned"	80 Ma	Late Cretaceous	Herbivore	0.25 m	0.6 m	5 kg	Bohlin (1953)	Mongolia (Djadokhta Fm)	Winnie the Pooh: "The tiniest little horned relative of all. He was so small he hopped around on his back legs to find sweet leaves."
Montanoceratops cerorhynchus	"Montana horned face"	70 Ma	Late Cretaceous	Herbivore	1.0 m	3.0 m	170 kg	Sternberg (1951)	USA (St. Mary River Fm)	Dawn: "He’s got a prominent, sharp horn right on his nose and strong jaws for chewing tough Cretaceous forest shrubs."
Protoceratops hellenikorhinus	"First horned face"	72 Ma	Late Cretaceous	Herbivore	0.7 m	2.0 m	180 kg	Lambert (2001)	Mongolia (Djadokhta Fm)	Bugs Bunny: "The famous sheep of the Gobi desert, doc! This species grew a funky, double-crested ridge right along its snout."
Anchiceratops ornatus	"Close horned face"	71 Ma	Late Cretaceous	Herbivore	2.2 m	5.0 m	2,000 kg	Brown (1914)	Canada (Horseshoe Canyon)	Thea Stilton: "An incredibly ornate neck frill adorned with multiple pairs of bony spikes along the edge. Exceedingly fashionable!"
Arrhinoceratops brachyops	"No nose-horn face"	71 Ma	Late Cretaceous	Herbivore	2.0 m	5.0 m	2,000 kg	Parks (1925)	Canada (Horseshoe Canyon)	Alvin: "They thought he didn't have a nose horn at all, but he actually has a short, blunt one alongside two giant brow horns!"
Avaceratops lammersi	"Ava's horned face"	77 Ma	Late Cretaceous	Herbivore	1.2 m	4.2 m	1,000 kg	Dodson (1986)	USA (Judith River Fm)	Brainy Smurf: "A small, basal centrosaurine. Statistically, its compact, unnotched frill serves as an excellent baseline for ceratopsid growth."
Centrosaurus apertus	"Pointed lizard"	76 Ma	Late Cretaceous	Herbivore	2.0 m	5.5 m	2,300 kg	Lambe (1904)	Canada (Dinosaur Park)	Tigger: "A massive single nose horn and two big bony hooks curving forward over the top of his neck sheet! Hoo-hoo-hoo!"
Chasmosaurus belli	"Cleft lizard"	76 Ma	Late Cretaceous	Herbivore	2.0 m	4.8 m	2,000 kg	Lambe (1902)	Canada (Dinosaur Park)	Garfield: "He’s got a giant, square neck frill that looks like a billboard. Mostly hollow window holes inside, covered in skin."
Nasutoceratops titusi	"Large-nosed horned face"	75 Ma	Late Cretaceous	Herbivore	2.2 m	4.5 m	1,500 kg	Sampson (2013)	USA (Kaiparowits Fm)	Michelangelo: "Dude looks exactly like a modern bull! Long brow horns that curve forward and a giant round nose cavity. Radical!"
Pachyrhinosaurus lakustai	"Thick-nosed lizard"	73 Ma	Late Cretaceous	Herbivore	2.5 m	6.0 m	3,000 kg	Fiorillo (2008)	Canada / USA (Wapiti / Hell Creek Fm)	Optimus Prime: "Shedding long horns for a massive, flattened boss of bone on its snout, optimized for crushing impacts or species recognition."
Pentaceratops sternbergii	"Five-horned face"	74 Ma	Late Cretaceous	Herbivore	5.7 m	7.9 m	4,000 kg	Osborn (1923)	USA (Kirtland Fm)	Daffy Duck: "Five horns?! Two over the eyes, one on the nose, and two giant cheek spikes! Talk about hogging all the spikes! It's despicable!"
Sinoceratops zhuchengensis	"Chinese horned face"	73 Ma	Late Cretaceous	Herbivore	2.5 m	6.0 m	3,000 kg	Xu (2010)	China (Xingezhuang Fm)	Dawn: "The first definitive large-bodied ceratopsid found outside of North America! It has a beautiful ring of small horns on its frill."
Styracosaurus ovatus	"Spiked lizard"	75 Ma	Late Cretaceous	Herbivore	2.5 m	5.5 m	2,700 kg	Gilmore (1930)	USA (Two Medicine Fm)	Optimus Prime: "A menacing defensive platform. Boasting a long nasal horn and a spectacular array of elongated spikes radiating from the frill margin."
Torosaurus latus	"Perforated lizard"	66 Ma	Late Cretaceous	Herbivore	3.0 m	8.0 m	6,000 kg	Marsh (1891)	USA (Hell Creek Fm)	Bugs Bunny: "Holds the record for one of the largest skulls of any land animal ever, doc! A massive frill that could cover an entire car!"
Triceratops horridus	"Three-horned face"	66 Ma	Late Cretaceous	Herbivore	3.0 m	9.0 m	9,000 kg	Marsh (1889)	USA (Hell Creek, Lance Fm)	Optimus Prime: "The peak of ceratopsid evolution. Possessing a solid, unperforated bony frill and massive structural brow horns built to withstand heavy combat."

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Fabrosaurus australis	“Fabre’s lizard” (southern)	Early Jurassic (Hettangian–Sinemurian)	~3.3 ft (1 m)	Large cat–sized	Lesotho	Known only from teeth and jaw fragments; validity doubtful; probably same as Lesothosaurus
Lesothosaurus diagnosticus	“Lizard from Lesotho” (diagnostic)	Early Jurassic (Hettangian–Sinemurian)	3–6.6 ft (1–2 m)	Chicken to dog–sized	Lesotho, South Africa	Very primitive ornithischian; long legs, five-fingered hands; one of the earliest true ornithischians
Scutellosaurus lawleri	“Little-shielded lizard” (Lawler’s)	Early Jurassic (Sinemurian–Pliensbachian)	~4 ft (1.2 m)	Large dog–sized	Arizona, USA	Early armored ornithischian; over 300 osteoderms; still bipedal but close to thyreophorans
Abrictosaurus consors	“Wakeful lizard” (companion)	Early Jurassic (Hettangian–Sinemurian)	~4 ft (1.2 m)	Large cat–sized	South Africa	Heterodontosaurid without tusks (possibly female); very lightly built
Echinodon becklesii	“Hedgehog tooth” (Beckles’)	Early Cretaceous (Berriasian)	~2 ft (0.6 m)	Squirrel–sized	England	Tiny heterodontosaurid; teeth with cingula (ridges); lived much later than relatives
Heterodontosaurus tucki	“Different-toothed lizard” (Tuck’s)	Early Jurassic (Hettangian–Sinemurian)	4–6 ft (1.2–1.8 m)	Dog to pig–sized	South Africa	Large tusks (male?), chisel-like cheek teeth; possibly omnivorous
Callovosaurus leedsi	“Callovian lizard” (Leeds’)	Middle Jurassic (Callovian)	~11 ft (3.5 m)	Horse–sized	England	Oldest known dryosaurid; formerly “Callovosaurus” = Camptosaurus leedsi
Dryosaurus elderae	“Tree lizard” (Elder’s)	Late Jurassic (Kimmeridgian–Tithonian)	10–14 ft (3–4.3 m)	Deer to horse–sized	Wyoming, USA; Tanzania	Fast runner; no thumb spike; classic “hypsilophodont” grade
Fulgurotherium australe	“Lightning-beast” (southern)	Early Cretaceous (Albian)	~4 ft (1.2 m)	Chicken–sized	Australia	Known only from opalized fragments; probably a basal ornithopod
Nanosaurus agilis	“Tiny lizard” (nimble)	Late Jurassic (Kimmeridgian–Tithonian)	~4–6 ft (1.2–2 m)	Chicken to turkey–sized	Colorado, Wyoming, USA	Very small; once included Othnielia and Drinker; now restricted to a single dentary
Parksosaurus warreni	“Park’s lizard” (Warren’s)	Late Cretaceous (Maastrichtian)	~8 ft (2.5 m)	Large dog–sized	Alberta, Canada	Close to Thescelosaurus; long toes, large eyes
Thescelosaurus garbanii	“Wonderful lizard” (Garban’s)	Late Cretaceous (Maastrichtian)	10–13 ft (3–4 m)	Rhino–sized (small)	Wyoming, Montana, Canada	Famous “heart” specimen (disputed); burrowing habits suggested by robust arms
Camptosaurus dispar	“Flexible lizard” (different)	Late Jurassic (Kimmeridgian–Tithonian)	16–26 ft (5–8 m)	Rhino–sized	Wyoming, Utah, USA; England	Heavy thumb spike; transitional to iguanodontians; many specimens from juveniles to adults

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Iguanodon bernissartensis	“Iguana tooth” (from Bernissart)	Early Cretaceous (Barremian–Aptian)	33 ft (10 m)	Rhino-sized	Belgium, England, Germany	Classic “thumb-spike” dinosaur; dozens of complete skeletons; walked on all fours part-time
Mantellisaurus atherfieldensis	“Mantell’s lizard” (from Atherfield)	Early Cretaceous (Aptian)	~23 ft (7 m)	Horse to rhino-sized	England	Lighter, more gracile than Iguanodon; formerly “Iguanodon atherfieldensis”
Muttaburrasaurus langdoni	“Muttaburra lizard” (Langdon’s)	Early Cretaceous (Albian)	26 ft (8 m)	Rhino-sized	Queensland, Australia	Inflatable snout; possible hollow nasal chamber for display/sound
Ouranosaurus nigeriensis	“Brave lizard” (from Niger)	Early Cretaceous (Aptian–Albian)	23–28 ft (7–8.5 m)	Rhino-sized	Niger	Tall neural spines formed a sail; thumb claws like Iguanodon
Probactrosaurus gobiensis	“Before Bactrosaurus” (from Gobi)	Early Cretaceous (Albian)	~20 ft (6 m)	Rhino-sized	Inner Mongolia, China	Transitional to hadrosaurids; still had thumb spike
Tenontosaurus dossi	“Sinew lizard” (Doss’)	Early Cretaceous (Aptian–Albian)	20–26 ft (6–8 m)	Rhino-sized	USA (Texas, Oklahoma, Montana)	Long tail; commonly preyed on by Deinonychus; no thumb spike
Brachylophosaurus canadensis	“Short-crested lizard” (Canadian)	Late Cretaceous (Campanian)	30–36 ft (9–11 m)	Elephant-sized	Montana, Alberta	Solid crest; spectacular “mummified” skin impressions
Edmontosaurus regalis	“Lizard from Edmonton Fm” (royal)	Late Cretaceous (Maastrichtian)	39–43 ft (12,12–13 m)	Elephant-sized	Alberta, Alaska, USA	Broad duckbill; thousands of individuals known; skin impressions
Gryposaurus latidens	“Hook-nosed lizard” (broad teeth)	Late Cretaceous (Campanian)	26–33 ft (8–10 m)	Elephant-sized	Alberta, Montana, USA	Roman nose; one of the most strongly built hadrosaurines
Hadrosaurus foulkii	“Bulky lizard” (Foulk’s)	Late Cretaceous (Campanian)	~26–33 ft (8–10 m)	Elephant-sized	New Jersey, USA	First relatively complete dinosaur skeleton in North America (1858)
Kritosaurus navajovius	“Noble lizard” (Navajo)	Late Cretaceous (Campanian)	~30 ft (9 m)	Elephant-sized	New Mexico, Texas, USA	Incomplete skull once confused with Gryposaurus
Maiasaura peeblesorum	“Good mother lizard” (Peebles’)	Late Cretaceous (Campanian)	30 ft (9 m)	Elephant-sized	Montana, USA	Famous nesting colonies with eggs, embryos, and juveniles
Prosaurolophus maximus	“Before Saurolophus” (biggest)	Late Cretaceous (Campanian)	26–33 ft (8–10 m)	Elephant-sized	Alberta, Canada	Small solid triangular crest
Saurolophus osborni	“Lizard crest” (Osborn’s)	Late Cretaceous (Campanian–Maa)	30–40 ft (9–12 m)	Elephant-sized	Mongolia, Alberta	Spike-like solid crest projecting backward
Shantungosaurus giganteus	“Shandong lizard” (giant)	Late Cretaceous (Campanian)	46–54 ft (14–16.5 m)	Largest hadrosaur	Shandong, China	Broad duckbill; possibly 15+ tons
Bactrosaurus johnsoni	“Club lizard” (Johnson’s)	Late Cretaceous (Turonian–Coniacian)	~20 ft (6 m)	Rhino-sized	Mongolia, China	Primitive lambeosaurine; no hollow crest
Corythosaurus casuarius	“Corinthian helmet lizard” (cassowary)	Late Cretaceous (Campanian)	26–33 ft (8–10 m)	Elephant-sized	Alberta, Canada	Hatchet/helmet-shaped crest; multiple complete skeletons and skin impressions
Hypacrosaurus stebingeri	“Near-the-highest lizard” (Stebinger’s)	Late Cretaceous (Campanian)	30 ft (9 m)	Elephant-sized	Montana, Alberta	Tall neural spines; nesting colonies with eggs and babies known
Jaxartosaurus aralensis	“Yaxartes (Aral Sea) lizard”	Late Cretaceous (Santonian–Campanian)	~30 ft (9 m)	Elephant-sized	Kazakhstan	Heart-shaped crest; poorly preserved skull
Lambeosaurus magnicristatus	“Lambe’s lizard” (large crest)	Late Cretaceous (Campanian)	33–50 ft (10–15 m)	Elephant-sized	Alberta, Canada; Baja California	Axe-shaped or hatchet crest; largest known lambeosaurine
Magnapaulia laticaudus	“Large Paul” (broad tail)	Late Cretaceous (Campanian)	~40–50 ft (12–15 m)	Elephant-sized	Baja California, Mexico	Large lambeosaurine with broad neural spines; formerly “Hypacrosaurus?”
Nipponosaurus sachalinensis	“Japan lizard” (from Sakhalin)	Late Cretaceous (Campanian)	~26 ft (8 m)	Elephant-sized	Sakhalin Island, Russia	Juvenile specimen with hollow crest
Parasaurolophus walkeri	“Near Saurolophus” (Walker’s)	Late Cretaceous (Campanian)	33–40 ft (10–12 m)	Elephant-sized	Alberta, Utah, New Mexico	Long, curved hollow tube crest; probably used for sound production
Tsintaosaurus spinorhinus	“Qingdao lizard” (spiked nose)	Late Cretaceous (Campanian)	33 ft (10 m)	Elephant-sized	Shandong, China	Forward-pointing “unicorn” spike (now known to be part of hollow crest)

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Alaskacephale gangloffi	“Alaska head” (Gangloff’s)	Late Cretaceous (Campanian)	~6–8 ft (2 m)	Large dog–sized	Alaska, USA	Thick dome with nodes; once considered a species of Pachycephalosaurus
Brontotholus harmoni	“Thunder dome” (Harmon’s)	Late Cretaceous (Campanian)	~12 ft (3.8 m)	Same sized	Montana, USA	Known only from dome fragments; validity uncertain
Dracorex hogwartsia	“Dragon king from Hogwarts”	Late Cretaceous (Maastrichtian)	~10–13 ft (3–4 m)	Rhino-sized (small)	South Dakota, USA	Flat-headed with spikes & nodes; now considered juvenile Pachycephalosaurus wyomingensis
Gravitholus albertae	“Heavy dome” (from Alberta)	Late Cretaceous (Campanian)	~8–10 ft (2.5–3 m)	Large dog–sized	Alberta, Canada	Thick dome; once thought a separate genus, now often synonymized with Stegoceras
Homalocephale calathocercos	“Even head” (basket-tail)	Late Cretaceous (Campanian)	~10 ft (3 m)	Bear-sized	Mongolia	Flat, wedge-shaped skull; possibly juvenile/prenatal form of Prenocephale
Pachycephalosaurus wyomingensis	“Thick-headed lizard” (from Wyoming)	Late Cretaceous (Maastrichtian)	15–16 ft (4.5–5 m)	Grizzly bear–sized	Montana, Wyoming, South Dakota, USA	Thickest dome (10+ inches); spikes & nodes; now includes Dracorex and Stygimoloch as growth stages
Sphaerotholus goodwini	“Ball dome” (Goodwin’s)	Late Cretaceous (Campanian)	~6–8 ft (2 m)	Large dog–sized	New Mexico, Montana, USA	Rounded dome; one of the smallest North American pachycephalosaurids
Stegoceras validum	“Horn roof” (valid/strong)	Late Cretaceous (Campanian)	6–7 ft (2–2.2 m)	Wolf-sized	Alberta, Canada	Classic dome with shelf; males had thicker domes than females
Stygimoloch spinifer	“Thorny devil from the river of death”	Late Cretaceous (Maastrichtian)	~10 ft (3 m)	Bear-sized	Montana, Wyoming, South Dakota, USA	Spiky “devil horns”; now considered sub-adult Pachycephalosaurus
Tylocephale gilmorei	“Swollen head” (Gilmore’s)	Late Cretaceous (Campanian)	~8 ft (2.5 m)	Large dog–sized	Mongolia	Tallest known dome relative to size; very thick skull

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Psittacosaurus meileyingensis	“Parrot lizard” (from Meileying)	Early Cretaceous (Aptian–Albian)	3.3–6.6 ft (1–2 m)	Turkey to pig–sized	Liaoning, China; Mongolia	Long bristle-like tail filaments in some specimens; most primitive ceratopsian
Bagaceratops rozhdestvenskyi	“Small horned face” (Rozhdestvensky’s)	Late Cretaceous (Campanian)	~3.3 ft (1 m)	Large dog–sized	Mongolia	Juvenile-looking even when adult; small beak, no horns
Leptoceratops gracilis	“Slender horned face” (graceful)	Late Cretaceous (Maastrichtian)	6–8 ft (2–2.5 m)	Pig to bear–sized	Alberta, Canada; Wyoming, USA	No brow horns or nasal horn; lived alongside Triceratops
Microceratus gobiensis	“Very small horned face” (from Gobi)	Late Cretaceous (Campanian)	~2.5 ft (0.75 m)	Hot-water-bottle–sized	Mongolia	Formerly “Microceratops”; tiny adult with small frill
Montanoceratops cerorhynchus	“Montana horned face” (horned nose)	Late Cretaceous (Maastrichtian)	~10 ft (3 m)	Bear-sized	Montana, USA	Small nasal horn; deep tail; primitive neoceratopsian
Protoceratops hellenikorhinus	“First horned face” (Hellenikorhinus)	Late Cretaceous (Campanian)	6–8 ft (1.8–2.5 m)	Pig to bear–sized	Mongolia	Famous “fighting dinosaurs” with Velociraptor; nested in dunes; no true horns
Anchiceratops ornatus	“Near horned face” (ornate)	Late Cretaceous (Maastrichtian)	15–20 ft (4.5–6 m)	Rhino-sized	Alberta, Canada	Very long frill with large epoccipitals; rectangular frill
Arrhinoceratops brachyops	“No-nose-horn face” (short face)	Late Cretaceous (Maastrichtian)	~15 ft (4.5 m)	Rhino-sized	Alberta, Canada	Short, broad frill; once thought to lack a nose horn (actually broken)
Chasmosaurus belli	“Opening lizard” (Bell’s)	Late Cretaceous (Campanian)	16–20 ft (5–6 m)	Rhino-sized	Alberta, Canada	Huge rectangular frill openings; brow horns long and forward-pointing
Pentaceratops sternbergii	“Five-horned face” (Sternberg’s)	Late Cretaceous (Campanian)	20–26 ft (6–8 m)	Rhino to elephant–sized	New Mexico, USA	Massive frill with huge epoccipitals; actually only three true horns
Torosaurus latus	“Perforated lizard” (wide)	Late Cretaceous (Maastrichtian)	23–30 ft (7–9 m)	Elephant-sized	Wyoming, Montana, Texas, USA	Longest frill of any land animal; now widely considered mature growth stage of Triceratops
Triceratops horridus	“Three-horned face” (frightful)	Late Cretaceous (Maastrichtian)	26–30 ft (8–9 m)	Elephant-sized	Western North America	Iconic; dozens of specimens; solid frill; possibly includes Torosaurus as old adults
Avaceratops lammersi	“Ava’s horned face” (Lammers’)	Late Cretaceous (Campanian)	~7.5 ft (2.3 m)	Bear-sized	Montana, USA	Small primitive centrosaurine; known from juvenile
Brachyceratops montanensis	“Short horned face” (from Montana)	Late Cretaceous (Campanian)	~5 ft (1.5 m)	Large dog–sized	Montana, USA	Known only from juveniles; possibly young Rubeosaurus or Einiosaurus
Centrosaurus apertus	“Pointed lizard” (open)	Late Cretaceous (Campanian)	20 ft (6 m)	Rhino-sized	Alberta, Canada	Single large nasal horn; frill with hooks; huge bonebeds (hundreds of individuals)
Diabloceratops eatoni	“Devil horned face” (Eaton’s)	Late Cretaceous (Campanian)	~15–18 ft (4.5–5.5 m)	Rhino-sized	Utah, USA	Oldest known centrosaurine; huge paired brow horns like Einiosaurus
Medusaceratops lokii	“Medusa horned face” (Loki’s)	Late Cretaceous (Campanian)	~20 ft (6 m)	Rhino-sized	Montana, USA	Wavy frill margin; originally thought chasmosaurine, now centrosaurine
Nasutoceratops titusi	“Big-nose horned face” (Titus’)	Late Cretaceous (Campanian)	~15–20 ft (4.5–6 m)	Rhino-sized	Utah, USA	Enormous round nasal horn bosses; very long brow horns
Pachyrhinosaurus lakustai	“Thick-nosed lizard” (Lakusta’s)	Late Cretaceous (Campanian)	20–26 ft (6–8 m)	Rhino to elephant–sized	Alberta, Canada; USA	Massive bony boss instead of nasal horn; huge bonebeds
Sinoceratops zhuchengensis	“Chinese horned face” (from Zhucheng)	Late Cretaceous (Campanian)	~20–23 ft (6–7 m)	Rhino-sized	Shandong, China	Only centrosaurine outside North America; large nasal horn and frill spikes
Styracosaurus ovatus	“Spiked lizard” (egg-shaped)	Late Cretaceous (Campanian)	18 ft (5.5 m)	Rhino-sized	Alberta, Canada	Long nasal horn plus 4–6 huge frill spikes; lived in herds

Genus List for Holtz (2026): Thyreophorans

Genus & Species	Name Meaning	Age	Time	Diet	Height	Length	Weight	Author	Region / Formation	Cartoon All-Stars's Comments/Facts
INFRAORDER STEGOSAURIA
Chungkingosaurus jiangbeiensis	"Chongqing lizard"	160 Ma	Late Jurassic	Herbivore	1.0 m	4.0 m	1,000 kg	Dong (1983)	China (Shaximiao Fm)	Alvin: "One of the smallest stegosaurs! He’s got an extra high pack of up to fourteen spikes on his tail thagomizer!"
Huayangosaurus taibaii	"Huayang lizard"	165 Ma	Middle Jurassic	Herbivore	1.3 m	4.5 m	1,500 kg	Dong (1982)	China (Shaximiao Fm)	Brainy Smurf: "A primitive basal stegosaur. Statistically, it's highly unique because it still retained teeth in its premaxilla (front beak), unlike later stegosaurids."
Lexovisaurus durobrivensis	"Lexovi lizard"	164 Ma	Middle Jurassic	Herbivore	1.5 m	5.0 m	2,000 kg	Hoffstetter (1957)	UK (Oxford Clay)	Thea Stilton: "An early European plated dinosaur featuring incredibly sharp armor spikes over its hips and shoulders. Exceedingly striking design! Fabumouse!"
Tuojiangosaurus multispinus	"Tuo River lizard"	160 Ma	Late Jurassic	Herbivore	2.0 m	7.0 m	2,800 kg	Dong (1977)	China (Shaximiao Fm)	Dawn: "He has narrow, pear-shaped plates running down his back that smoothly transform into long, defensive spikes over his hips!"
Dacentrurus armatus	"Pointed tail"	150 Ma	Late Jurassic	Herbivore	2.5 m	8.0 m	3,500 kg	Lucas (1902)	Europe (Kimmeridge Clay)	Optimus Prime: "A colossally robust European stegosaur. Shifting the defensive layout, its back features small plates that morph entirely into massive paired spikes along the posterior spine."
Gigantspinosaurus sichuanensis	"Giant-spined lizard"	160 Ma	Late Jurassic	Herbivore	1.2 m	4.2 m	700 kg	Ouyang (1992)	China (Shaximiao Fm)	Michelangelo: "Dude!! This guy grew two absolutely humongous, radical shoulder spikes that look like giant scimitars poking out his sides!"
Kentrosaurus aethiopicus	"Spiked lizard"	152 Ma	Late Jurassic	Herbivore	1.5 m	4.5 m	1,100 kg	Hennig (1915)	Tanzania (Tendaguru Fm)	Tigger: "Flat plates on his neck, but giant pointy spikes all over his back, hips, and tail! He’s the prickliest, bounciest pin-cushion around! Hoo-hoo-hoo!"
Stegosaurus stenops	"Roof lizard"	150 Ma	Late Jurassic	Herbivore	5.0 m	10.1 m	4,500 kg	Marsh (1887)	USA (Morrison Fm)	Optimus Prime: "The definitive plated icon. Armed with alternating, highly vascularized dorsal plates and a lethal four-spiked tail assembly."
Wuerhosaurus ordosensis	"Wuerho lizard"	120 Ma	Early Cretaceous	Herbivore	1.2 m	5.0 m	1,200 kg	Dong (1993)	China (Ejinhoro Fm)	Garfield: "A late-surviving stegosaur with short, stumpy legs and flat, rectangular plates that look like continuous fences. Good for avoiding active exercise."
Scelidosaurus harrisonii	"Limb lizard"	191 Ma	Early Jurassic	Herbivore	1.0 m	4.0 m	270 kg	Owen (1859)	UK (Charmouth Mudstone)	Bugs Bunny: "The granddaddy of all armored dinosaurs, doc! Walked on all fours, grazed on low ferns, and started the whole trend of wearing bony button jackets."
INFRAORDER ANKYLOSAURIA
Hylaeosaurus armatus	"Forest lizard"	137 Ma	Early Cretaceous	Herbivore	1.0 m	5.0 m	1,500 kg	Mantell (1833)	UK (Tunbridge Wells Sand)	Winnie the Pooh: "One of the very first three dinosaurs ever named by science! He wears a large cluster of friendly spines right on his shoulders."
Nodosaurus textilis	"Node lizard"	100 Ma	Late Cretaceous	Herbivore	1.5 m	5.5 m	2,000 kg	Marsh (1889)	USA (Frontier Fm)	Geronimo Stilton: "Gave his name to the entire Nodosauridae family! Completely lacks a tail club but boasts a beautifully organized textile-like pattern of armor nodes."
Panoplosaurus mirus	"Completely armored lizard"	75 Ma	Late Cretaceous	Herbivore	2.0 m	6.0 m	3,000 kg	Lambe (1919)	Canada (Dinosaur Park)	Daffy Duck: "A walking fortress! Extra-thick overlapping armor shields over his head and shoulders, meaning no predator could get a bite in! It's despicable!"
Polacanthus foxii	"Many spines"	125 Ma	Early Cretaceous	Herbivore	1.0 m	5.0 m	1,300 kg	Owen (1865)	UK (Wessex Fm)	Bluey: "He’s got a massive solid bony shield over his lower back and hips, like a giant turtle shell covered in sharp little bumps, for real life!"
Sauropelta edwardsorum	"Lizard shield"	108 Ma	Early Cretaceous	Herbivore	1.6 m	5.2 m	1,500 kg	Ostrom (1970)	USA (Cloverly Fm)	Optimus Prime: "A highly protected nodosaurid platform. Outstandingly preserved with immense, forward-projecting lateral neck spikes to deter ambush predators."
Silvisaurus condrayi	"Forest lizard"	100 Ma	Late Cretaceous	Herbivore	1.0 m	4.0 m	1,000 kg	Eaton (1960)	USA (Dakota Fm)	Winnie the Pooh: "A simpler, smaller armored friend who loved foraging quietly through Kansas forests while listening to the wind."
Struthiosaurus transylvanicus	"Ostrich lizard"	66 Ma	Late Cretaceous	Herbivore	0.7 m	2.5 m	300 kg	Nopcsa (1915)	Romania (Sânpetru Fm)	Brainy Smurf: "A fascinating example of island dwarfism! Statistically, living on ancient isolated European islands forced its body scale down significantly."
Ankylosaurus magniventris	"Fused lizard"	66 Ma	Late Cretaceous	Herbivore	3.3 m	11.0 m	6,000 kg	Brown (1908)	USA (Hell Creek, Lance Fm)	Optimus Prime: "The ultimate living tank. Boasting a fully fused, impenetrable cranium, low-slung interlocking body armor, and a crushing structural tail club."
Crichtonsaurus bohlini	"Crichton's lizard"	90 Ma	Late Cretaceous	Herbivore	1.2 m	3.5 m	500 kg	Dong (2002)	China (Sunjiawan Fm)	Alvin: "Named after Michael Crichton, the awesome author who wrote Jurassic Park! How cool is that?!"
Euoplocephalus tutus	"Well-armed head"	76 Ma	Late Cretaceous	Herbivore	1.8 m	5.5 m	2,500 kg	Lambe (1902)	Canada (Dinosaur Park)	Bugs Bunny: "He leaves absolutely zero structural weaknesses, doc! He even grew armored eyelids to protect his eyes when predators tried to scratch him!"
Saichania chulsanensis	"Beautiful one"	72 Ma	Late Cretaceous	Herbivore	2.2 m	6.0 m	2,800 kg	Maryańska (1977)	Mongolia (Barun Goyot Fm)	Michelangelo: "A super-heavy desert cruiser! Bony armor completely covering its throat and underside—totally radical armor coverage!"
Talarurus plicatospineus	"Basket tail"	90 Ma	Late Cretaceous	Herbivore	1.5 m	5.0 m	1,800 kg	Maleev (1952)	Mongolia (Bayan Shireh)	Tigger: "The specialized tendons in his tail are all woven together tightly like a basket to hold up that grand, bouncy club! Hoo-hoo-hoo!"

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Scelidosaurus harrisonii	“Limb lizard” (Harrison’s)	Early Jurassic (Sinemurian–Pliensbachian)	13 ft (4 m)	Rhino-sized (small)	England	One of the most primitive armored dinosaurs; full body armor + long tail; known from complete skeletons
Chungkingosaurus jiangbeiensis	“Chongqing lizard” (from Jiangbei)	Late Jurassic (Oxfordian)	~13–16 ft (4–5 m)	Rhino-sized	Sichuan, China	Small plates in two rows; very spiky tail; one of the smallest adult stegosaurs
Gigantspinosaurus sichuanensis	“Giant-spined lizard” (from Sichuan)	Late Jurassic (Oxfordian)	~23 ft (7 m)	Rhino-sized	Sichuan, China	Enormous shoulder spines (>3 ft long); plates relatively small
Huayangosaurus taibaii	“Huayang lizard” (after poet Taibai)	Middle Jurassic (Bathonian–Callovian)	14 ft (4.3 m)	Rhino-sized (small)	Sichuan, China	Primitive; had small tail club, pre-maxillary teeth, and tall skull; plates not in pairs
Dacentrurus armatus	“Very spiky tail” (armed)	Late Jurassic (Kimmeridgian–Tithonian)	23–33 ft (7–10 m)	Rhino to elephant-sized	England, France, Portugal	Formerly “Omosaurus”; long shoulder spines; largest European stegosaur
Hesperosaurus mjosi	“Western lizard” (Mjos’)	Late Jurassic (Kimmeridgian)	~23 ft (7 m)	Rhino-sized	Wyoming, USA	Broad, rounded plates; once thought an old individual of Stegosaurus
Kentrosaurus aethiopicus	“Prickly lizard” (from Africa)	Late Jurassic (Kimmeridgian–Tithonian)	15–17 ft (4.5–5.2 m)	Rhino-sized	Tendaguru, Tanzania	Spikes all the way from shoulders to tail tip; shoulder spikes up to 3 ft long
Miragaia longicollum	“Mira’s earth” (long neck)	Late Jurassic (Kimmeridgian–Tithonian)	~21–23 ft (6.5–7 m)	Rhino-sized	Portugal	Longest neck of any stegosaur (17 cervical vertebrae); very long shoulder spines
Stegosaurus stenops	“Roof lizard” (narrow face)	Late Jurassic (Kimmeridgian–Tithonian)	23–33 ft (7–10 m)	Rhino to elephant-sized	Colorado, Wyoming, Utah, USA	Classic double-row alternating plates; four tail spikes (“thagomizer”); most complete specimens
Tuojiangosaurus multispinus	“Tuo River lizard” (many-spined)	Late Jurassic (Oxfordian)	23 ft (7 m)	Rhino-sized	Sichuan, China	Tall, triangular plates in pairs; very long shoulder spines; close relative of Stegosaurus

Genus & Species	Name Meaning	Age / Time	Length	Weight	Where Found	Comments
Acanthopholis horridus	“Dreadful spiny scale”	Early–Late Cretaceous (Albian–Cenomanian)	~13–16 ft (4–5 m)	Rhino-sized (small)	England	Very poorly known; spiky osteoderms; once mixed with other taxa
Antarctopelta oliveroi	“Antarctic shield” (Olivero’s)	Late Cretaceous (Campanian)	~13–20 ft (4–6 m)	Rhino-sized	Antarctica	First dinosaur described from Antarctica; mix of nodosaurid and ankylosaurid traits
Dracopelta zbyszewskii	“Dragon shield” (Zbyszewski’s)	Late Jurassic (Tithonian)	~10–13 ft (3–4 m)	Rhino-sized (small)	Portugal	Very primitive ankylosaur; rib armor fused to vertebrae
Edmontonia rugosidens	“From Edmonton Formation” (rough teeth)	Late Cretaceous (Campanian)	20–23 ft (6–7 m)	Rhino-sized	Alberta, Canada; USA	Large shoulder spikes; thick skull roof; formerly “Palaeoscincus”
Gastonia lorriemcwhinneyae	“Gaston’s” (Lorrie McWhinney’s)	Early Cretaceous (Barremian–Aptian)	~16–18 ft (5–5.5 m)	Rhino-sized	Utah, USA	Extremely spiky; huge shoulder blades and shoulder spikes; lived with Utahraptor
Hylaeosaurus armatus	“Forest lizard” (armoured)	Early Cretaceous (Valanginian)	~16–20 ft (5–6 m)	Rhino-sized	England	One of the first dinosaurs ever named (1833); known from partial skeleton + armor
Nodosaurus textilis	“Node lizard” (woven)	Early Cretaceous (Albian–Cenomanian)	~16–20 ft (5–6 m)	Rhino-sized	Wyoming, Kansas, USA	No tail club; armor in bands; very poorly preserved original specimen
Panoplosaurus mirus	“Completely armoured lizard” (marvelous)	Late Cretaceous (Campanian)	16–23 ft (5–7 m)	Rhino-sized	Alberta, Canada	Heavy neck armor, no shoulder spikes; belly armor known
Polacanthus foxii	“Many spines” (Fox’s)	Early Cretaceous (Barremian–Aptian)	~13–18 ft (4–5.5 m)	Rhino-sized	England, Spain	Large pelvic shield with fused plates; long shoulder spines
Sauropelta edwardsorum	“Lizard shield” (Edwards’)	Early Cretaceous (Aptian–Albian)	17–23 ft (5.2–7 m)	Rhino-sized	Wyoming, Montana, USA	Massive cervical spines; one of the oldest North American nodosaurids
Struthiosaurus austriacus	“Ostrich lizard” (Austrian)	Late Cretaceous (Campanian–Maa)	~6.5–10 ft (2–3 m)	Large dog to bear-sized	Austria, Romania, France	Small island-dwarf nodosaurid; braincase shows reduced hearing
Ankylosaurus magniventris	“Fused lizard” (big belly)	Late Cretaceous (Maastrichtian)	20–35 ft (6–11 m)	Rhino to elephant-sized	Montana, Alberta, Wyoming	Tail club + full body armor; widest skull of any ankylosaurid; last and largest
Crichtonsaurus bohlini	“Crichton’s lizard” (Bohlin’s)	Late Cretaceous (Cenomanian?)	~13–16 ft (4–5 m)	Rhino-sized (small)	Liaoning, China	Small Chinese ankylosaurid; once confused with “Crichtonsaurus benxiensis”
Dyoplosaurus acutosquameus	“Double-armored lizard” (sharp scales)	Late Cretaceous (Campanian)	~15–20 ft (4.5–6 m)	Rhino-sized	Alberta, Canada	Now considered a junior synonym of Euoplocephalus by most researchers
Euoplocephalus tutus	“Well-armored head” (safe)	Late Cretaceous (Campanian)	16–20 ft (5–6 m)	Rhino-sized	Alberta, Canada	Large tail club; eyes armored; many complete skeletons
Minmi paravertebra	“From Minmi Crossing” (beside vertebrae)	Early Cretaceous (Albian)	~10 ft (3 m)	Horse-sized	Queensland, Australia	Smallest and most primitive ankylosaurid; belly armor + small horizontal plates along body
Minotaurasaurus ramachandrani	“Minotaur lizard” (Ramachandran’s)	Late Cretaceous (Campanian)	~13–16 ft (4–5 m)	Rhino-sized (small)	Gobi, Mongolia	Spectacular skull with bulbous armor; once sold commercially
Saichania chulsanensis	“Beautiful” (from Chulsan)	Late Cretaceous (Campanian)	~20 ft (6 m)	Rhino-sized	Mongolia	Best-preserved ankylosaurid skull; air passages for cooling brain
Scolosaurus thronus	“Pointed-stake lizard” (throne)	Late Cretaceous (Campanian)	~20 ft (6 m)	Rhino-sized	Alberta, Canada	Large tail club; often considered a species of Euoplocephalus or Oohkotokia
Talarurus plicatospineus	“Wicker-tail” (folded spines)	Late Cretaceous (Turonian–Santonian)	16–20 ft (5–6 m)	Rhino-sized	Mongolia	Massive tail club; skull with complex air passages
Tarchia teresae	“Brainy one” (after Teresa Maryańska)	Late Cretaceous (Campanian–Maa)	~20–26 ft (6–8 m)	Rhino-sized	Mongolia	Largest Asian ankylosaurid skull; very rough armor texture

Here are the structured chart tables for Dinosaurs, A Celebration Issue #1: "Terrible Claws and Tyrants" and its companion feature, Dinosaurs Neighbor The Pterosaurs.

The tables organize your specified species by their orders and clades, incorporating realistic fossil data along with artistic, character-driven field commentary from Zoe DaVinci of The DaVincibles.

Part 1: Saurischia (Issue #1: "Terrible Claws and Tyrants")

Order Herrerasauria & Order Ceratosauria

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Herrerasaurus	H. ischigualastensis	Herrerasauridae	6 meters long	Ischigualasto Formation, Argentina	Ultra-flexible lower jaw joint for gripping struggling prey	"One of the absolute originals! This blueprint set the stage for millions of years of teeth and claws."
Staurikosaurus	S. pricei	Herrerasauridae	2.2 meters long	Santa Maria Formation, Brazil	High-speed agility and rapid lateral snapping reflexes	"Small, lightning-fast, and deeply chaotic. Do not let this one near the time machine's wiring."
Abelisaurus	A. comahuensis	Abelisauridae	7.4 meters long	Anacleto Formation, Argentina	High-altitude biting pressure with a tall, light skull	"Look at that short snout! It looks like a bulldog crossed with a T-Rex. Quite stylish in a terrifying way."
Carnotaurus	C. sastrei	Abelisauridae	7.8 meters long	La Colonia Formation, Argentina	Extreme straight-line sprinting speed and brow horns	"Bull-horns on a theropod? Talk about a wardrobe statement. Too bad its arms are smaller than my paintbrush!"
Ceratosaurus	C. nasicornis	Ceratosauridae	6 meters long	Morrison Formation, USA	Blade-like nasal horn and deep, crocodile-like tail	"A classic Jurassic punk rocker with that nose horn. Excellent swimmer too, perfect for catching swamp monsters."
Coelophysis	C. bauri	Coelophysidae	3 meters long	Ghost Ranch, New Mexico, USA	Ultra-light hollow bones and structural pack-hunting	"Sleek, aerodynamic, and always traveling in packs. They look graceful until they target your lunchbox."
Dilophosaurus	D. wetherilli	Dilophosauridae	7 meters long	Kayenta Formation, Arizona, USA	Dual fragile head crests used for mating visual displays	"No, it doesn't spit acid or have a neck frill like Hollywood says! But those twin crests are pure high fashion."
Liliensternus	L. liliensterni	Coelophysoidea	5.1 meters long	Trossingen Formation, Germany	Razor-sharp serrated teeth built for slicing through tough hide	"A Triassic titan! It bridged the gap between tiny runners and massive apex predators beautifully."

Order Coelurosauria & Order Deinonychosauria

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Avimimus	A. nemegtensis	Avimimidae	1.5 meters long	Nemegt Formation, Mongolia	High-gear running speeds and fully fused bird-like hand bones	"It looks like a hyperactive prehistoric roadrunner. Pablo, stop trying to sketch it, it's moving too fast!"
Compsognathus	C. longipes	Compsognathidae	1.2 meters long	Solnhofen Limestone, Germany	Quick clawed grasping hands and nocturnal vision tracks	"So tiny and delicate! You almost forget they could strip a small lizard to the bone in five seconds flat."
Moros	M. intrepidus	Tyrannosauroidea	2.5 meters long	Cedar Mountain Formation, Utah, USA	Exceptional sensory gear and lightning-fast ambush agility	"A miniature ancestor of the T-Rex. It proves that greatness starts small—and very, very bitey."
Ornitholestes	O. hermanni	Tyroraptora	2 meters long	Morrison Formation, USA	Sharp, precision-gripping hands for capturing small game	"The 'bird robber' itself! Scurrying through the Jurassic undergrowth like an overgrown, scaly ferret."
Adasaurus	A. mongoliensis	Dromaeosauridae	1.8 meters long	Nemegt Formation, Mongolia	Deeply blunted, heavy sickle-claws built for pinned crushing	"A raptor with a shorter sickle claw. Modified gear for a specific tactical survival strategy, fascinating!"
Deinonychus	D. antirrhopus	Dromaeosauridae	3.4 meters long	Cloverly Formation, Montana, USA	Massive, razor-edged sickle-claws used for pinning down heavy prey	"The true inspiration for the movie monsters! Those switchblade claws are an engineering masterpiece."
Saurornitholestes	S. sullivani	Dromaeosauridae	1.8 meters long	Kirtland Formation, New Mexico, USA	Highly acute olfactory senses for tracking prey in the dark	"An incredible sense of smell. This one smelled Uncle Leo's cooking from three miles away and looked disgusted."
Troodon	T. formosus	Troodontidae	2.4 meters long	Judith River Formation, Montana, USA	Massive brain-to-body mass ratio and binocular vision	"The intellectual of the Mesozoic. If it had a few more million years, it would be building its own museums!"
Velociraptor	V. osmolskae	Dromaeosauridae	2 meters long	Djadochta Formation, Mongolia	Pinpoint desert ambush camouflage and pack-tactics	"Much smaller than the movies make them out to be, but every inch a perfect feather-covered ninja."

Order Carnosauria

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Albertosaurus	A. sarcophagus	Tyrannosauridae	9 meters long	Horseshoe Canyon, Canada	Massive bone-crushing jaw power combined with pack-tracking	"Canada's finest engine of destruction! Sleeker and faster than its big cousin Rex."
Allosaurus	A. europaeus	Allosauridae	12.5 meters long	Lourinhã Formation, Portugal; Morrison Formation, USA	Wide-gaping jaw used as a hatchet-like striking weapon	"The ultimate Jurassic gangster. That hatchet-bite mechanic belongs in a modern art gallery."
Baryonyx	B. walkeri	Spinosauridae	10 meters long	Weald Clay, England	Giant 30cm thumb claws engineered for heavy-duty gaffing	"The star of Issue #1! Crocodile snout, fish eater, and massive hooks. A brilliant biological twist."
Daspletosaurus	D. horneri	Tyrannosauridae	9 meters long	Two Medicine Formation, USA	Sensory-rich facial scales used for tactile hunting	"Frighteningly strong. Its face was covered in sensitive nerve endings—imagine a tank with whiskers."
Giganotosaurus	G. carolinii	Carcharodontosauridae	12.5 meters long	Candeleros Formation, Argentina	Specialized serrated teeth designed for causing massive blood loss	"Absolutely colossal! It makes T-Rex look like it's on a fitness diet. Don't make sudden movements..."
Metriacanthosaurus	M. parkeri	Metriacanthosauridae	8 meters long	Oxford Clay, England	High-spined vertebrae providing superior muscle attachment	"Beautifully constructed spinal ridges. A textbook Jurassic hunter that doesn't get enough credit."
Spinosaurus	S. aegyptiacus	Spinosauridae	14 meters long	Kem Kem Group, Morocco	Giant dorsal display sail and fully semi-aquatic propulsion	"A river monster larger than a city bus! That giant sail is a true masterpiece of natural design."
Tyrannosaurus	T. rex	Tyrannosauridae	15.0 meters long	Hell Creek Formation, USA	Maximum biological bite force paired with acute binocular vision	"The absolute King. Six tons of muscle, bone-shattering teeth, and a gaze that paralyzes you instantly."
Yangchuanosaurus	Y. zigongensis	Metriacanthosauridae	8 meters long	Upper Shaximiao Formation, China	Massive, robust skull configurations built for crushing impact	"The pride of Jurassic Asia! Those bony facial ridges give it an incredibly fierce expression."

Part 2: Dinosaurs Neighbor The Pterosaurs

Suborder Rhamphorhynchoidea (Long-Tailed Pterosaurs)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Anurognathus	A. ammoni	Anurognathidae	35 cm wingspan	Solnhofen Limestone, Germany	Short, wide jaws built for mid-air maneuvering and catching insects	"It looks like a fuzzy little prehistoric bat-frog! I want to keep one in a birdcage, but it's too wild."
Dimorphodon	D. macronyx	Dimorphodontidae	1.4 meter wingspan	Blue Lias, England	Heavy, puffin-like snapping beak with dual distinct tooth shapes	"What a bizarre design—a massive skull on a flying body. It looks like a flying caricature."
Eudimorphodon	E. ranzii	Eudimorphodontidae	1 meter wingspan	Zorzino Limestone, Italy	Multi-cusped teeth designed for gripping slippery fish scales	"The Triassic aviator! Those complex, tiny teeth are a dental hygienist's nightmare."
Rhamphorhynchus	R. etchesi	Rhamphorhynchidae	1.2 meter wingspan	Kimmeridge Clay, England	Forward-pointing interlocking teeth and a diamond-tipped tail rudder	"A classic needle-beak. That tail kite rudder is brilliant for steering through seaside storms."
Scaphognathus	S. crassirostris	Rhamphorhynchidae	90 cm wingspan	Solnhofen Limestone, Germany	Broad, sturdy jawline structures built for diversified hunting	"Nicknamed the 'tub-snout.' Not as elegant as Rhamphorhynchus, but definitely rugged and practical."

Suborder Pterodactyloidea (Short-Tailed Pterosaurs)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Dsungaripterus	D. weii	Dsungaripteridae	3 meter wingspan	Junggar Basin, China	Curved, upturned beak tip paired with flat crushing plates	"It uses its beak like a pair of pliers to crack open clams! Prehistoric beachcombing at its finest."
Ornithocheirus	O. simus	Ornithocheiridae	6 meter wingspan	Cambridge Greensand, England	Rounded snout crest used to stabilize the beak in ocean water	"A true globetrotter. It spans whole oceans using thermal air currents like a living glider plane."
Pteranodon	P. sternbi	Pteranodontidae	6 meter wingspan	Niobrara Chalk, Kansas, USA	Massive backward-pointing skull crest acting as an aerodynamic counterweight	"No teeth, all drama! That giant crest is the ultimate pilot's helmet for navigating the late Cretaceous sky."
Quetzalcoatlus	Q. lawsoni	Azhdarchidae	25.5 meter wingspan	Javelina Formation, Texas, USA	Long, stork-like spear beak and efficient four-legged land stalking	"This species is the smaller cousin of the giant Q. northropi, but it’s still as tall as a horse! Truly spectacular."

Before structuring the data, there is a tiny, smurf-sized piece of history to gently correct! While the comic anthology Dinosaurs, A Celebration leaned heavily into real science, the species "Smurfette smurfensis" is a fictional cartoon crossover from Peyo's universe, not an actual prehistoric prosauropod. For a laugh, Zoe has addressed this head-on in her notes!

Here are the complete chart tables for Issue #2: "Egg Stealers and Earth Shakers" and the companion feature, Dinosaurs Neighbor The Crocodilians.

Part 1: Saurischia (Issue #2: "Egg Stealers and Earth Shakers")

Order Oviraptorosauria & Order Ornithomimosauria

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Chirostenotes	C. pergracilis	Caenagnathidae	2.5 meters long	Dinosaur Park Formation, Canada	Long, slender fingers optimized for probing crevices for food	"Look at those elegant, spindly hands! Perfect for delicate work, or stealing keys from a time machine."
Conchoraptor	C. gracilis	Oviraptoridae	1.2 meters long	Barun Goyot Formation, Mongolia	Powerful, toothless beak designed for crushing tough shells	"A specialized nutcracker on legs. This little one could easily snap my best charcoal sketching pencils."
Elmisaurus	E. rarus	Elmisauridae	2 meters long	Nemegt Formation, Mongolia	Highly specialized fused foot bones for agile, rocky running	"Sleek and nimble! It evolved feet built like shock absorbers to sprint across treacherous terrains."
Oviraptor	O. philoceratops	Oviraptoridae	1.6 meters long	Djadochta Formation, Mongolia	Deep, crested skull providing a highly efficient crushing bite	"Maliciously misnamed the 'egg thief' for decades, but it was actually a devoted parent guarding its own nest!"
Deinocheirus	D. mirificus	Deinocheiridae	11 meters long	Nemegt Formation, Mongolia	Gigantic 2.4-meter arms with massive, blunt digging claws	"An absolute titan of a misfit! Part duck, part camel, with arms longer than me. Nature was feeling creative here."
Dromiceiomimus	D. samueli	Ornithomimidae	3.5 meters long	Horseshoe Canyon, Canada	Exceptionally large eye sockets tailored for sharp night vision	"With legs like an ostrich and eyes that see perfectly in the dark, you cannot sneak up on this speedster."
Gallimimus	G. bullatus	Ornithomimidae	6 meters long	Nemegt Formation, Mongolia	Extreme high-speed flock maneuvering and flock mechanics	"They move in perfect synchronization like a biological wave. Just don't get caught in the middle of a stampede!"
Ornithomimus	O. velox	Ornithomimidae	3.8 meters long	Denver Formation, Colorado, USA	Lightweight, hollow-boned skeleton built for peak acceleration	"The 'bird mimic' is pure aerodynamics. If it had feathers, it would look right at home on a modern racetrack."
Struthiomimus	S. altus	Ornithomimidae	4 meters long	Oldman Formation, Canada	Long, clamping toothless beak optimized for browsing vegetation	"Sleek, classy, and built for speed. It spends its day browsing leaves, looking completely unbothered by predators."

Order Therizinosauria & Order Prosauropods

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Erlikosaurus	E. andrewsi	Therizinosauridae	4.5 meters long	Bayan Shireh Formation, Mongolia	Highly advanced sensory hearing and a precise clipping beak	"A bizarre evolutionary puzzle. It has the brain structure of a hunter but chose a quiet life eating leaves."
Segnosaurus	S. galbinensis	Therizinosauridae	6 meters long	Bayan Shireh Formation, Mongolia	Uniquely wide pelvis accommodating a massive digestive system	"Built like a tank with a massive torso. It needed a giant stomach just to process all that tough prehistoric fiber."
Therizinosaurus	T. cheloniformis	Therizinosauridae	10 meters long	Nemegt Formation, Mongolia	Massive 1-meter scythe claws used for defense and foliage pulling	"Edward Scissorhands has nothing on this guy! Those giant scythe claws could easily turn a T-Rex into confetti."
Anchisaurus	A. polyzelus	Anchisauridae	2 meters long	Portland Formation, Connecticut, USA	Facile shifting between bipedal running and quadrupedal walking	"A brilliant little transitional design. It changes its walking stance depending on how fast it needs to escape."
Massospondylus	M. kaalae	Massospondylidae	4–6 meters long	Upper Elliot Formation, South Africa	Large, gripping thumb claws used to pull down high branches	"Those sharp thumbs are basically organic Swiss Army knives. Perfect for self-defense or grabbing a snack."
Melanorosaurus	M. readi	Melanorosauridae	8 meters long	Lower Elliot Formation, South Africa	Incredibly robust, heavy limb bones built for weight bearing	"The dawn of the true giants. It traded speed for massive structural support, anchoring itself firmly to the earth."
Mussaurus	M. patagonicus	Mussauridae	3 meters (Adult)	El Tranquilo Formation, Argentina	Dramatic growth scaling from tiny hatchlings to large adults	"We found fossilized eggs the size of a golf ball! It's hard to believe something so tiny grows into a giant."
Plateosaurus	P. gracilis	Plateosauridae	8 meters long	Trossingen Formation, Germany	High-reaching bipedal feeding stance with powerful grasping hands	"The pride of Triassic Europe! It stands tall on its hind legs like an overgrown, leaf-eating lizard sentinel."
Riojasaurus	R. incertus	Riojasauridae	10 meters long	Los Colorados Formation, Argentina	Dense, heavily reinforced vertebrae to support a massive frame	"Completely bound to four legs. This heavy-duty trailblazer set the structural blueprint for the massive sauropods."
Smurfette	S. smurfensis	Fictional / Peyo	3 Smurfs tall	Smurf Village (Fiction)	Blue camouflage and turning dynamic chaos into charm	"Wait a minute, Pablo! Who snuck a cartoon character into my field notes? Back to the drawing board, little blue friend!"
Thecodontosaurus	T. antiquus	Thecodontosauridae	2 meters long	Durdham Down, Bristol, England	Highly efficient spoon-shaped teeth for shredding tough flora	"Small, primitive, and highly energetic. The perfect little starter kit for the entire sauropod family tree."
Yunnanosaurus	Y. youngi	Yunnanosauridae	7 meters long	Lufeng Formation, China	Advanced, self-sharpening sauropod-like chewing dentition	"Its teeth wear down symmetrically, creating sharp edges automatically. That's a masterclass in dental engineering!"

Order Sauropods

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Apatosaurus	A. ajax	Diplodocidae	22 meters long	Morrison Formation, USA	Supersonic whip-like tail tip used for defense and signaling	"The classic 'thunder lizard.' One crack of that massive whip tail would sound like a sonic boom across the plains."
Brachiosaurus	B. altithorax	Brachiosauridae	26 meters long	Morrison Formation, USA; Kota Formation, India	Upward-sloping skeletal frame for high-canopy browsing	"A living skyscraper! Its front legs are longer than its back legs, giving it the ultimate view of the world."
Camarasaurus	C. supremus	Camarasauridae	23 meters long	Morrison Formation, USA	Boxy, hollowed-out skull chambers reducing head weight	"A very sturdy design. Its skull looks like a reinforced cage, maximize chewing power while staying light."
Diplodocus	D. hallorum	Diplodocidae	32 meters long	Morrison Formation, USA	Extreme horizontal reach paired with peg-like stripping teeth	"This gentle giant stretches across entire zip codes. It rakes through foliage like a massive biological comb."
Dreadnoughtus	D. schrani	Titanosauridae	26 meters long	Cerro Fortaleza Formation, Argentina	Immense, unassailable physical mass discouraging all predators	"Fearing absolutely nothing! When you weigh as much as an entire fleet of cars, the world steps aside for you."
Mamenchisaurus	M. sinocanadorum	Mamenchisauridae	35 meters long	Shishugou Formation, China	A phenomenal 15-meter neck supported by interlocking rods	"Unbelievable! The neck makes up half of its total length. It looks like a living crane assembly line."
Omeisaurus	O. fuxiensis	Mamenchisauridae	20 meters long	Shaximiao Formation, China	Heavy bone club tail weapon used for close-quarters defense	"A sauropod with a club on its tail! Talk about a nasty surprise for any predator trying to sneak up from behind."
Opisthocoelicaudia	O. skarzynskii	Saltasauridae	13 meters long	Nemegt Formation, Mongolia	Flat-topped pelvis allowing stable tripod bracing on its tail	"It can literally sit back on its tail to reach the highest branches. A masterclass in structural balance!"
Patagotitan	P. mayorum	Titanosauridae	37 meters long	Cerro Barcino Formation, Argentina	Absolute maximum terrestrial biological size and scaling	"The true ruler of weight class! Seeing this creature step over our base camp is completely humbling."
Saltasaurus	S. loricatus	Saltasauridae	12.5 meters long	Lecho Formation, Argentina	Armored bony osteoderms embedded into its leathery skin	"A sauropod wearing a leather jacket studded with rocks. Excellent protection against sneaky mid-sized predators."
Supersaurus	S. vivianae	Diplodocidae	39 meters long	Morrison Formation, USA	Colossal, record-breaking horizontal skeletal framework	"An absolute masterpiece of nature. Walking alongside it feels like walking next to a moving train."

Part 2: Dinosaurs Neighbor The Crocodilians

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Deinosuchus	D. rugosus	Alligatoroidea	10.6 meters long	Aguja Formation, Texas, USA	Bone-crushing ambush bite force capable of taking down theropods	"The ultimate shore patrol. It turned the beach from a relaxation spot into a highly dangerous hunting zone."
Sarcosuchus	S. imperator	Pholidosauridae	9.5 meters long	Elrhaz Formation, Niger	Elongated, interlocking snout built for snaring giant fish and dinosaurs	"Nicknamed SuperCroc for a reason! That huge bulb on its snout is perfect for terrifying aquatic resonance."

Here are the comprehensive chart tables for Dinosaurs, A Celebration Issue #3: "Bone-Heads and Duck-Bills" and its companion segment, Dinosaurs Neighbor Mammals.

The structured data covers your complete list of Ornithischian dinosaurs, flat-headed and dome-headed pachycephalosaurs, and early synapsid/mammalian neighbors, packed with field observations from Zoe DaVinci of The DaVincibles.

Part 1: Ornithischia (Issue #3: "Bone-Heads and Duck-Bills")

Ancestral Ornithischia & Order Ornithopoda

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Lesothosaurus	L. diagnosticus	Lesothosauridae	2 meters long	Upper Elliot Formation, Lesotho	Lightweight agility and swift leaping maneuvers to avoid predators	"The grandfather of the bird-hipped crowd! Tiny, nervous, and faster than a stray firework."
Pisanosaurus	M. mertii	Pisanosauridae	1 meter long	Ischigualasto Formation, Argentina	Compact structural agility for running through dense Triassic brush	"A genuine pioneer. It doesn't look like much, but this little guy contains the blueprint for every duck-bill to come."
Camptosaurus	C. dispar	Camptosauridae	6 meters long	Morrison Formation, USA	Heavy, sturdy hindlimbs built for shifting between two and four legs	"A real working-class herbivore. Broad teeth made for chewing tough shrubs like a biological lawnmower."
Dryosaurus	D. elderae	Dryosauridae	3 meters long	Morrison Formation, USA	High-velocity running coupled with a stiff, stabilizing counterweight tail	"Sleek and completely built for flight over fight. Its only defense strategy was leaving predators in the dust."
Heterodontosaurus	H. tucki	Heterodontosauridae	1.2 meters long	Upper Elliot Formation, South Africa	Distinct tusk-like canine teeth used for defensive biting	"Fangs on a plant-eater? Absolutely brilliant. Talk about a surprise defense mechanism when a predator gets too close."
Hypsilophodon	H. foxii	Hypsilophodontidae	1.8 meters long	Wessex Formation, Isle of Wight, UK	Ultra-sharp horny beak engineered for precision vegetation clipping	"For a long time people thought they lived in trees! Turns out they were just world-class ground sprinters."
Iguanodon	I. bernissartensis	Iguanodontidae	11.8 meters long	Bernissart Mine, Belgium	Conical thumb spikes designed for close-quarters defensive stabbing	"The legend that started dinosaur science! Those thumb spikes are perfect for telling a theropod to back off."
Muttaburrasaurus	M. langdoni	Iguanodontia	8 meters long	Mackunda Formation, Australia	An enlarged, hollow nasal chamber built for booming audio signals	"That giant inflatable nose structure must have made a racket! Imagine a foghorn on a multi-ton lizard."
Nanosaurus	A. agilis	Ornithischia	1 meter long	Morrison Formation, USA	Compact size enabling easy navigation through low Jurassic ferns	"Tiny and delicate! It darts around the legs of giant sauropods like a scaly, hyperactive squirrel."
Ouranosaurus	O. nigeriensis	Styracosterna	7 meters long	Elrhaz Formation, Niger	High, elongated vertebrae spines supporting a massive dorsal sail	"A duck-bill with a sail! Perfect for heat regulation in the scorching Cretaceous sun, or just showing off."
Parksosaurus	P. warreni	Thescelosauridae	2.5 meters long	Horseshoe Canyon, Canada	Strong, robust ankles allowing rapid lateral evasive maneuvers	"A tough, resilient survivor from the very end of the dinosaur age. Small but highly optimized."

Family: Hadrosauridae (Subfamily: Hadrosaurinae - Flat-Headed/Solid-Crested)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Brachylophosaurus	B. canadensis	Hadrosaurinae	9 meters long	Judith River Formation, Montana, USA	A flat, paddle-like bone crest on top of the skull for display	"Famous for mummy fossils with preserved skin! Their scales look like fine beadwork on high-end fashion."
Edmontosaurus	E. regalis	Hadrosaurinae	12 meters long	Horseshoe Canyon, Canada; Lance, USA	Massive tooth batteries capable of grinding down industrial wood	"An absolute titan of a duck-bill. They traveled in herds that must have stretched past the horizon."
Kritosaurus	K. navajovius	Hadrosaurinae	9 meters long	Kirtland Formation, New Mexico, USA	High, hooked nasal bridge structures used for visual species ID	"Look at that noble Roman nose! It gives this gentle giant an incredibly dignified, artistic profile."
Maiasaura	M. peeblesorum	Hadrosaurinae	9 meters long	Two Medicine Formation, USA	Highly coordinated communal nesting sites and parental care	"The 'good mother lizard.' Finding their nesting grounds proves dinosaurs weren't just cold monsters; they cared!"
Prosaurolophus	P. maximus	Hadrosaurinae	9 meters long	Dinosaur Park Formation, Canada	Small, solid hornlet ridge between the eyes for facial structure	"A great middle-step in crest evolution. It’s subtle, sleek, and perfectly balanced on the skull."
Saurolophus	S. osborni	Hadrosaurinae	10 meters long	Horseshoe Canyon, Canada	Long, spike-like solid skull crest pointing directly backward	"The upward-pointing head spike looks like a built-in lightning rod! Simple but highly striking."

Family: Hadrosauridae (Subfamily: Lambeosaurinae - Hollow-Crested)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Corythosaurus	C. casuarius	Lambeosaurinae	9 meters long	Dinosaur Park Formation, Canada; Lance Formation, USA	Hollow, helmet-shaped crest serving as an acoustic resonance chamber	"It looks like it's wearing a ancient Corinthian battle helmet. The sound it makes must be deep and haunting."
Lambeosaurus	L. magnicristatus	Lambeosaurinae	9.5 meters long	Dinosaur Park Formation, Canada	Hatchet-shaped hollow skull crest used for vocal bellows	"That crest is pure architectural wildness. It looks like a giant forward-facing axe head!"
Olorotitan	O. arharensis	Lambeosaurinae	8 meters long	Tsagayan Formation, Russia	Massive, fan-shaped hollow crest paired with an ultra-flexible neck	"The 'titanic swan' of the Cretaceous. Its crest fans out beautifully at the back of the head like a crown."
Parasaurolophus	P. walkeri	Lambeosaurinae	10 meters long	Dinosaur Park Formation, Canada	Long, curved hollow tube crest producing low-frequency booming	"The absolute rockstar of the hadrosaurs! That 1.8-meter tube trombone skull is a acoustic masterpiece."
Tsintaosaurus	T. spinorhinus	Lambeosaurinae	10 meters long	Wangshi Group, China	Vertical, forward-angled hollow horn creating unique vocal tones	"They used to think it had a unicorn horn! The actual hollow crest structure is still incredibly avant-garde."

Order Pachycephalosauria (The Bone-Heads)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Dracorex	D. hogwartsia	Pachycephalosauridae	3 meters long	Hell Creek Formation, USA	Spiky, flat skull roof covered in demonic nodes and horns	"The 'Dragon King of Hogwarts!' It looks like a mythical beast, even if it's likely a teenage Pachycephalosaurus."
Goyocephale	G. lattimorei	Pachycephalosauridae	2 meters long	Barun Goyot Formation, Mongolia	Flat, highly vascularized skull top optimized for flank-butting	"No dome here! It kept things flat and spiky, probably for pushing and shoving within the herd hierarchy."
Homalocephale	H. calathocercos	Pachycephalosauridae	1.8 meters long	Nemegt Formation, Mongolia	Wide hip architecture protecting vital organs during impacts	"An exceptionally broad pelvis. Built to absorb shockwaves if a rival decided to ram them from the side."
Micropachycephalosaurus	M. hongtuyanensis	Pachycephalosauridae	1 meter long	Wangshi Group, China	Ultra-compact size combined with a reinforced skull roof	"The longest name for one of the smallest dinosaurs! It's like a pocket-sized bowling ball with legs."
Pachycephalosaurus	P. wyomingensis	Pachycephalosauridae	4.5 meters long	Hell Creek Formation, USA	Massive, 25-centimeter thick solid bone dome atop the head	"The undisputed heavyweight champion of headbutting. That solid bone dome is nature's ultimate crash helmet."
Prenocephale	P. prenes	Pachycephalosauridae	2.4 meters long	Nemegt Formation, Mongolia	Fully round, high sloping dome ringed with neat bony nodules	"A beautifully symmetrical dome. It looks like a highly decorated crown studded with little bone pearls."
Stegoceras	S. validum	Pachycephalosauridae	2 meters long	Dinosaur Park Formation, Canada	Highly dense, semi-domed skull roof with a smooth profile	"The textbook pachycephalosaur. Small, compact, and perfectly engineered for active social jousting."
Stygimoloch	S. spinifer	Pachycephalosauridae	3 meters long	Hell Creek Formation, USA	Elongated, cluster-like spikes projecting from the back of the dome	"The 'demon from the river Styx.' Those massive cluster spikes look incredibly aggressive and dramatic."

Part 2: Dinosaurs Neighbor Mammals

NAMED	SPECIES/TYPE	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Cynodonts	Thrinaxodon / Oligokyphus	Cynodontia	30–50 cm long	Global distribution (e.g., South Africa, Europe)	Advanced sensory whiskers, high metabolism, and burrowing habits	"Our direct ancestors! Scurrying in the shadows of giants, keeping warm with fur while the world shakes."
Monotremes	Steropodon galmani	Monotremata	40 cm long	Griman Creek Formation, Australia	Electro-reception bills used for hunting under mud and water	"Egg-laying mammals living right alongside Cretaceous dinosaurs. Talk about an incredible biological crossover!"

Here are the completed, structured chart tables for Dinosaurs, A Celebration Issue #4: "Horns and Heavy Armor" and its marine companion segment, Dinosaurs Neighbor Sea Reptiles.

The final issue showcases the heavily armored defense specialists, spiked titans, and the terrifying prehistoric reptiles that dominated the Mesozoic oceans, rounded out with field notes from Zoe DaVinci.

Part 1: Ornithischia (Issue #4: "Horns and Heavy Armor")

Basal Ceratopsians & Subfamily Chasmosaurinae (Long Frills)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Leptoceratops	L. gracilis	Leptoceratopidae	2 meters long	Scollard Formation, Canada	Compact, hornless design with powerful chewing jaws	"No fancy head gear here! Just a rugged, low-to-the-ground survivor running around on two legs when panicked."
Protoceratops	P. hellenikorhinus	Protoceratopidae	2.5 meters long	Bayan Mandahu, China	High, sharp beak used for slicing tough desert flora	"The 'sheep of the Cretaceous.' They didn't have horns, but their jaws could easily snap a broomstick in half."
Psittacosaurus	P. meileyingensis	Psittacosauridae	2 meters long	Jiufotang Formation, China	Tail-mounted quill structures used for dynamic visual display	"The 'parrot lizard!' The bristly quills on its tail look like an incredibly punk-rock fashion choice."
Chasmosaurus	C. belli	Chasmosaurinae	5 meters long	Dinosaur Park Formation, Canada	Massive, rectangular frill acting as a huge visual billboard	"That frill is absolutely enormous! It’s mostly open bone covered in skin, clearly meant for showing off, not shielding."
Pentaceratops	P. sternbergii	Chasmosaurinae	6.4 meters long	Kirtland Formation, New Mexico, USA	Five distinct bony facial spikes paired with an epic crest	"Talk about maximum drama. Five facial horns and a skull that’s taller than a standard doorway!"
Torosaurus	T. latus	Chasmosaurinae	8 meters long	Hell Creek Formation, USA	Largest known skull of any land animal with wide frill openings	"An absolute titan. Its head takes up a third of its body length! It’s like a walking art canvas."
Triceratops	T. horridus	Chasmosaurinae	9 meters long	Hell Creek Formation, USA	Solid bone neck frill and three-meter-long solid brow horns	"The ultimate defensive powerhouse. Solid bone armor, lethal lances, and zero tolerance for annoying T-Rexes."

Subfamily Centrosaurinae (Short, Spiky Frills)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Centrosaurus	C. apertus	Centrosaurinae	5.5 meters long	Dinosaur Park Formation, Canada	Forward-curving nasal horn with hooked frill appendages	"A beautifully bizarre design. The horns hook forward like a pair of organic canopy umbrellas."
Nasutoceratops	N. titusi	Centrosaurinae	4.5 meters long	Kaiparowits Formation, Utah, USA	Curved, cattle-like brow horns and a rounded, bulbous snout	"It looks exactly like a prehistoric bull! Those curved horns are unique among its spiky relatives."
Pachyrhinosaurus	P. lakustai	Centrosaurinae	8 meters long	Wapiti Formation, Canada; Hell Creek Formation, USA	Massive, thick bone boss on the nose used for battering	"No horn, just a giant bony anvil on its face! Imagine getting headbutted by a multi-ton rhino."
Sinoceratops	S. zhuchengensis	Centrosaurinae	6 meters long	Xingezhuang Formation, China	A circular crown of forward-curving hornlets lining the frill	"The pride of Cretaceous Asia! That frill looks like a beautiful, spiked royal crown."
Styracosaurus	S. ovatus	Centrosaurinae	5.5 meters long	Two Medicine Formation, USA	Multiple massive, radiating spikes projecting from the frill	"Pure heavy metal design! It looks like an explosion of spikes. Nobody is sneaking up on this one."

Order Stegosauria (The Spiked & Plated Dinosaurs)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Chungkingosaurus	C. jiangbeiensis	Huayangosauridae	4 meters long	Shaximiao Formation, China	High-standing dorsal plates and a multi-spiked thagomizer	"Compact but incredibly pointy. It carries its tail spikes high, ready to swing at anything nearby."
Dacentrurus	D. armatus	Stegosauridae	7–8 meters long	Kimmeridge Clay, England	Massive, broad hips paired with an entirely spiked tail structure	"A European classic. It swaps out wide plates for pure, defensive spikes all the way down its spine."
Gigantspinosaurus	G. sichuanensis	Stegosauridae	4.2 meters long	Shaximiao Formation, China	Colossal shoulder spines extending backward over its flanks	"Look at those shoulder sabers! It looks like a sci-fi vehicle built for battle."
Huayangosaurus	H. taibaii	Huayangosauridae	4.5 meters long	Shaximiao Formation, China	Double row of spike-like plates and primitive teeth	"The ancestor of the stegosaurs. It still has teeth in the front of its mouth, unlike its later cousins."
Kentrosaurus	K. aethiopicus	Stegosauridae	4.5 meters long	Tendaguru Formation, Tanzania	Long, lethal thigh spikes and highly flexible tail joints	"An absolute nightmare for predators. Trying to bite this is like trying to eat a giant, angry pincushion."
Stegosaurus	S. stenops	Stegosauridae	9 meters long	Morrison Formation, USA	Alternating diamond dorsal plates and four lateral tail spikes	"The undisputed icon! Those massive back plates were likely a giant solar panel system or a warning flag."
Tuojiangosaurus	T. multispinus	Stegosauridae	7 meters long	Shaximiao Formation, China	Tall, conical plates running into a heavily armed tail tip	"Sleek and symmetrical. Its spine looks like a row of perfectly sculpted, razor-sharp architectural peaks."

Order Ankylosauria (The Armored Tanks)

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Ankylosaurus	A. magniventris	Ankylosauridae	10.8 meters long	Hell Creek Formation, USA	Heavy, fused bone tail club capable of shattering theropod shins	"A literal living fortress. Even its eyelids were armored! The ultimate definition of 'no entry.'"
Euoplocephalus	E. tutus	Ankylosauridae	5.5 meters long	Dinosaur Park Formation, Canada	Massive bone bands shielding the neck and a wide, flat club	"It looks like an oversized armadillo built out of concrete. Perfectly safe from anything with teeth."
Nodosaurus	N. textilis	Nodosauridae	6 meters long	Frontier Formation, Wyoming, USA	Tight, interlocking armor mats without a heavy tail club	"Streamlined defense! It lacked a club but compensated with a beautiful, woven coat of bony scales."
Pinacosaurus	P. grangeri	Ankylosauridae	5 meters long	Djadochta Formation, Mongolia	Additional skull breathing chambers to filter desert sand dust	"An armored tank with custom air filters! Perfect for surviving brutal Mesozoic sandstorms."
Polacanthus	P. foxii	Nodosauridae	5 meters long	Wessex Formation, Isle of Wight, UK	A massive solid bone shield protecting the entire pelvic region	"It has a solid bone rug over its hips! A very clever way to protect its most vulnerable backside."
Sauropelta	S. edwardsorum	Nodosauridae	5.2 meters long	Cloverly Formation, Montana, USA	Enormous forward-pointing neck spines defending the throat	"Those giant neck spikes look terrifying. No predator is getting near its throat without getting impaled."
Scelidosaurus	S. harrisonii	Basal Thyreophora	4 meters long	Blue Lias, Dorset, England	Early evolutionary rows of small bony studs along the back	"The blueprint for all armor! Small, simple, and the great-grandfather of the tank community."
Scutellosaurus	S. lawleri	Basal Thyreophora	1.2 meters long	Kayenta Formation, Arizona, USA	Ultra-lightweight agile build with hundreds of tiny armor scutes	"A bipedal armored runner. It proves that you don't have to be slow and heavy to wear protection."
Talarurus	T. plicatospineus	Ankylosauridae	5 meters long	Bayan Shireh Formation, Mongolia	Uniquely wide, specialized feet for walking over soft terrain	"An armored tank built for the wetlands. Those wide feet kept it from sinking into the mud under its own weight."

Part 2: Dinosaurs Neighbor Sea Reptiles

NAMED	SPECIES	CLADE/FAMILY	SIZE	DIGSITE/LOCATION	SPECIAL SKILLS	Zoe DaVinci's Comments (The DaVincibles)
Dolichorhynchops	D. herschelensis	Polycotylidae	5 meters long	Bearpaw Shale, Canada	Long, needle-beaked jaws built for rapid underwater snapping	"Sleek and incredibly fast. It darts through the water like an overgrown, toothy penguin."
Elasmosaurus	E. platyurus	Elasmosauridae	10.3 meters long	Pierre Shale, Kansas, USA	Ultra-elongated neck with 72 vertebrae for stealth fishing	"Its neck is longer than its body and tail combined! It looks like an ancient sea serpent with flippers."
Eurhinosaurus	E. huenei	Leptopterygiidae	6 meters long	Posidonia Shale, Germany	An extreme, tooth-lined upper jaw extension resembling a swordfish	"Nature invented the sawfish way ahead of schedule here. A truly radical adaptation for ocean hunting."
Ichthyosaurus	I. conybeari	Ichthyosauridae	2 meters long	Blue Lias, England	High-efficiency dolphin-like body geometry and massive eyes	"The ultimate swimmer. Completely adapted to the open sea, never needing to step onto land again."
Kronosaurus	K. queenslandicus	Pliosauridae	9–10 meters long	Toolebuc Formation, Australia	Gigantic, crushing skull with massive, banana-sized teeth	"The true nightmare of the deep. A single bite from this skull could snap a marine reptile clean in half."
Mosasaurus	M. beaugei	Mosasauridae	13.5 meters long	Ouled Abdoun Basin, Morocco	Powerful paddle-tail propulsion and an extra row of roof teeth	"The T-Rex of the ocean. It ruled the late Cretaceous seas with an iron jaw and incredible grace."
Nanaimoteuthis	N. jeletzkyi	Coleoidea (Cephalopod)	30 cm long	Haslam Formation, Canada	Internalized shell structure for high-velocity jet propulsion	"An ancient squid swimming for its life! Everything in these waters is trying to make a snack out of it."
Ophthalmosaurus	O. icenicus	Eye-shaped Ichthyosaur	6 meters long	Oxford Clay, England	Giant, dinner-plate-sized eyes engineered for deep-sea diving	"Those eyes are absolutely massive! Perfect for gathering faint light in the pitch-black ocean trenches."
Plesiosaurus	P. dolichodeirus	Plesiosauridae	3.5 meters long	Blue Lias, Dorset, England	Four uniform, wing-like flippers providing underwater flight	"The classic marine reptile. It looks like it’s literally flying through the water rather than swimming."

Here are the formatted data charts for your requested Saurischia dinosaurs. To keep this massive dataset legible and clean, the list is broken down into structured tables categorized by their respective evolutionary orders.

Fictional/crossover entries from your list (Smurfette smurfensis from The Smurfs) and pop-culture/art-themed elements (Zoe DaVinci from the animated series The DaVincibles) have been given matching fan-fiction style entries to fit the context!

🦕 Order Herrerasauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Herrerasaurus ischigualastensis**	Carnivore	Floodplains, forests	Mesozoic / Late Triassic / ~230–220 MYA	H: 1.5 m L: 3.5–6 m W: 350 kg	Ischigualasto Formation, San Juan, Argentina	One of the earliest known true dinosaurs; highly agile predator. Zoe: "An absolute masterpiece of early bipedal engineering! Simple, clean design."
**Staurikosaurus pricei**	Carnivore	Tropical scrublands	Mesozoic / Late Triassic / ~233 MYA	H: 0.8 m L: 2.2 m W: 30 kg	Santa Maria Formation, Rio Grande do Sul, Brazil	Slender, fast hunter with a deeply slotted jaw to grip struggling prey. Zoe: "A minimalist sketch of a theropod. Sleek, fast, and completely unpretentious."

🦖 Order Ceratosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Abelisaurus comahuensis**	Carnivore	Semi-arid plains	Mesozoic / Late Cretaceous / ~83–80 MYA	H: 2.5 m L: 7.4 m W: 1.5–3 tons	Anacleto Formation, Río Negro, Argentina	Known mostly from a single large skull with high crests and rough bone texture. Zoe: "The textures on that skull are so rugged! It's like a rough plaster sculpture."
**Carnotaurus sastrei**	Carnivore	Coastal wetlands	Mesozoic / Late Cretaceous / ~72–69 MYA	H: 3.0 m L: 7.5–9 m W: 1.3–2 tons	La Colonia Formation, Chubut, Argentina	Distinct bull-like horns above eyes and exceptionally stunted, useless arms. Zoe: "Those tiny arms are a major design flaw, but the horns are high fashion!"
**Ceratosaurus nasicornis**	Carnivore	Forested river valleys	Mesozoic / Late Jurassic / ~153–148 MYA	H: 2.0 m L: 6–7 m W: 500–700 kg	Morrison Formation, Colorado/Utah, USA	Notable for a distinct nasal horn and small osteoderm rows down its spine. Zoe: "A nasal horn? Now that is a bold architectural statement for a carnivore."
**Coelophysis bauri**	Carnivore	Desert floodplains	Mesozoic / Late Triassic / ~216–203 MYA	H: 0.9 m L: 3 m W: 15–25 kg	Ghost Ranch, New Mexico, USA	Hundreds of skeletons found together, proving structured pack behavior. Zoe: "The perfect symmetrical composition when they crowd together like that!"
**Dilophosaurus wetherilli**	Carnivore	Seasonal river basins	Mesozoic / Early Jurassic / ~193 MYA	H: 2.0 m L: 6–7 m W: 400 kg	Kayenta Formation, Arizona, USA	Possessed dual thin, bony head crests. (Did not spit venom or have a neck frill). Zoe: "Those double crests have amazing geometry. Real visual symmetry."
**Liliensternus liliensterni**	Carnivore	Coastal floodplains	Mesozoic / Late Triassic / ~211 MYA	H: 1.8 m L: 5.1 m W: 130 kg	Trossingen Formation, Thuringia, Germany	Transitional apex predator filling the evolutionary gap after the Triassic extinction. Zoe: "A beautiful bridge between classic Triassic shapes and Jurassic scale."

🪶 Order Coelurosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Avimimus nemegtensis**	Omnivore	Arid basin oases	Mesozoic / Late Cretaceous / ~70 MYA	H: 1.0 m L: 1.5 m W: 15 kg	Nemegt Formation, Gobi Desert, Mongolia	Extremely bird-like features with fused leg bones and highly probable arm feathers. Zoe: "Practically an avant-garde bird! The feather patterns are pure art."
**Compsognathus longipes**	Carnivore	Dry lagoons, islands	Mesozoic / Late Jurassic / ~150 MYA	H: 0.3 m L: 1.0 m W: 2.5–3.5 kg	Solnhofen Limestone, Bavaria, Germany	Tiny, hyper-active predator that specialized in hunting lizards and insects. Zoe: "A delicate little pocket sculpture. So tiny yet full of fierce energy!"
**Moros intrepidus**	Carnivore	Coastal deltas	Mesozoic / Late Cretaceous / ~96 MYA	H: 1.2 m L: 2.5 m W: 78 kg	Cedar Mountain Formation, Utah, USA	A tiny, cursorial precursor to the massive tyrannosaurids of North America. Zoe: "The humble origin sketch of the T-Rex line. Good things start small!"
**Ornitholestes hermanni**	Carnivore	Dense inland forests	Mesozoic / Late Jurassic / ~154 MYA	H: 0.8 m L: 2 m W: 12–15 kg	Bone Cabin Quarry, Wyoming, USA	Fast runner with elongated claws designed to snatch up small woodland prey. Zoe: "Its proportions look like a continuous, elegant sweeping line brushstroke."

🥚 Order Oviraptorosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Chirostenotes pergracilis**	Omnivore	Coastal floodplains	Mesozoic / Late Cretaceous / ~76.5 MYA	H: 1.5 m L: 2.5 m W: 60 kg	Dinosaur Park Formation, Alberta, Canada	Known for long, slender hands and an unusually elongated second finger trait. Zoe: "Look at those hands—delicate and expressive, like a Renaissance pianist!"
**Conchoraptor gracilis**	Omnivore	Arid sand dunes	Mesozoic / Late Cretaceous / ~70 MYA	H: 0.8 m L: 1.5 m W: 20 kg	Barun Goyot Formation, Gobi Desert, Mongolia	Lacked a head crest entirely; possesses a powerful beak likely used to crush shells. Zoe: "Minimalist and practical. No flashy headgear needed to make a statement."
**Elmisaurus rarus**	Omnivore	River delta basins	Mesozoic / Late Cretaceous / ~70 MYA	H: 0.8 m L: 2 m W: 25 kg	Nemegt Formation, Omnogovi, Mongolia	Highly specialized feet with fused ankle bones akin to modern flightless birds. Zoe: "The abstract blending of bird aesthetics and reptile kinetics is fantastic."
**Oviraptor philoceratops**	Omnivore	Arid scrub deserts	Mesozoic / Late Cretaceous / ~75 MYA	H: 1.3 m L: 2 m W: 35–45 kg	Djadochta Formation, Gobi Desert, Mongolia	Falsely named an "egg thief" when found atop a nest that actually belonged to it. Zoe: "Tragic! Misunderstood by critics just because of bad composition placement."

🏃 Order Ornithomimosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Deinocheirus mirificus**	Herbivore / Omnivore	Swamps, deltas	Mesozoic / Late Cretaceous / ~70 MYA	H: 6.0 m L: 15 m W: 6.4 tons	Nemegt Formation, Gobi Desert, Mongolia	Possessed massive 2.4-meter arms, a prominent sail-back, and a duck-like beak. Zoe: "An absolute surrealist collage of a dinosaur! Dalí would be totally obsessed."
**Dromiceiomimus samueli**	Herbivore / Omnivore	Open floodplains	Mesozoic / Late Cretaceous / ~73 MYA	H: 1.6 m L: 3.5 m W: 100–150 kg	Horseshoe Canyon Fm, Alberta, Canada	Noted for massive eye sockets and extremely long, slender hind limbs. Zoe: "The giant eyes give it fantastic focus. It looks like it's studying my artwork."
**Gallimimus bullatus**	Herbivore / Omnivore	Semi-arid plains	Mesozoic / Late Cretaceous / ~70 MYA	H: 2.0 m L: 6–8 m W: 450 kg	Nemegt Formation, Gobi Desert, Mongolia	The largest of the classic "ostrich-mimic" dinosaurs, built for high-speed sprints. Zoe: "The ultimate embodiment of motion in art. A blurry masterpiece when running."
**Ornithomimus velox**	Herbivore / Omnivore	Forested coastlines	Mesozoic / Late Cretaceous / ~66 MYA	H: 1.5 m L: 3.8 m W: 170 kg	Denver Formation, Colorado, USA	The very first ornithomimid ever discovered; toothless with bird-like feet. Zoe: "The original blueprint for the fast-running genre. Classic, crisp lines."
**Struthiomimus altus**	Herbivore / Omnivore	Inland marshes	Mesozoic / Late Cretaceous / ~76–74 MYA	H: 1.4 m L: 4.3 m W: 150 kg	Dinosaur Park Formation, Alberta, Canada	Boasts stiffened tail mechanics acting like a strict counterbalance during sharp turns. Zoe: "Perfect balance! The structural engineering of that tail keeps it centered."

💅 Order Therizinosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Erlikosaurus andrewsi**	Herbivore	Floodplain forests	Mesozoic / Late Cretaceous / ~90 MYA	H: 2.2 m L: 6 m W: 500 kg	Bayan Shireh Formation, Gobi Desert, Mongolia	Retained tiny teeth inside its beak, aiding in resolving therizinosaur skull evolution. Zoe: "A beautiful mosaic skull that helps fill in the missing pieces of history."
**Segnosaurus galbinensis**	Herbivore	River delta valleys	Mesozoic / Late Cretaceous / ~102–86 MYA	H: 2.5 m L: 6–7 m W: 1.3 tons	Bayan Shireh Formation, Gobi Desert, Mongolia	Possessed an uniquely wide, basin-shaped pelvis to hold its massive gut. Zoe: "A very bold choice of volume and mass. It prioritizes function over form!"
**Therizinosaurus cheloniformis**	Herbivore	Wetland river systems	Mesozoic / Late Cretaceous / ~70 MYA	H: 5.5 m L: 9–10 m W: 5 tons	Nemegt Formation, Gobi Desert, Mongolia	Possessed terrifying 1-meter long scythe claws used for pulling down high branches. Zoe: "Those claws make an incredible dramatic statement. Gothic horror meets herbivore!"

🦅 Order Deinonychosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Adasaurus mongoliensis**	Carnivore	Woodland oases	Mesozoic / Late Cretaceous / ~70 MYA	H: 0.8 m L: 1.8 m W: 15 kg	Nemegt Formation, Bayankhongor, Mongolia	Notable for having a significantly smaller, flattened sickle claw on its second toe. Zoe: "Subverting classic raptor expectations with an asymmetrical claw design!"
**Deinonychus antirrhopus**	Carnivore	Forested wetlands	Mesozoic / Early Cretaceous / ~115–108 MYA	H: 1.0 m L: 3.4 m W: 73–100 kg	Cloverly Formation, Montana/Wyoming, USA	The dinosaur that triggered the 'Dinosaur Renaissance' by proving high activity levels. Zoe: "A dynamic masterpiece. It completely redefined the posture of ancient history."
**Saurornitholestes sullivani**	Carnivore	Swampy floodplains	Mesozoic / Late Cretaceous / ~73 MYA	H: 0.6 m L: 1.8 m W: 10 kg	Kirtland Formation, New Mexico, USA	Outfitted with an exceptional sense of smell, indicated by expanded nasal cavities. Zoe: "Imagine experiencing the world through smell textures. Such sensory art!"
**Troodon formosus**	Omnivore	Sub-arctic forests	Mesozoic / Late Cretaceous / ~77 MYA	H: 1.0 m L: 2.4 m W: 50 kg	Judith River Formation, Montana, USA	Historically high brain-to-body mass ratio; large eyes suited for low-light hunting. Zoe: "The intellectual of the Mesozoic era. Intellectual design at its absolute finest."
**Velociraptor osmolskae**	Carnivore	Arid sand dunes	Mesozoic / Late Cretaceous / ~75–71 MYA	H: 0.5 m L: 2.0 m W: 15 kg	Djadochta Formation, Gobi Desert, Mongolia	Medium-sized dromaeosaur; found famously locked in a death duel with a Protoceratops. Zoe: "That fossilized battle is the most intense action sequence captured in stone!"

🦖 Order Carnosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Albertosaurus sarcophagus**	Carnivore	Open canopy forests	Mesozoic / Late Cretaceous / ~71–68 MYA	H: 3.0 m L: 9 m W: 2–2.5 tons	Horseshoe Canyon Fm, Alberta, Canada	A slender, fast-running tyrannosaurid that likely hunted large prey in packs. Zoe: "A perfectly streamlined interpretation of the classic giant predator canvas."
**Allosaurus europaeus**	Carnivore	Floodplain savannas	Mesozoic / Late Jurassic / ~150 MYA	H: 4.5 m L: 12.5 m W: 6 tons	Lourinhã Formation, Lisbon, Portugal / Morrison Formation, New Mexico, USA	The European counterpart of the classic American 'Lion of the Jurassic'. Zoe: "An old-world European adaptation. Very classic, sharp structural contours."
**Baryonyx walkeri**	Piscivore / Carnivore	Swamps, estuaries	Mesozoic / Early Cretaceous / ~130–125 MYA	H: 2.5 m L: 7.5–10 m W: 1.2–2 tons	Weald Clay Structure, Surrey, England	Possessed a crocodile-like snout and a singular, massive hook claw on each thumb. Zoe: "The thematic maritime crossover nobody expected. Those thumb hooks are wild!"
**Daspletosaurus horneri**	Carnivore	Coastal deltas	Mesozoic / Late Cretaceous / ~75 MYA	H: 3.0 m L: 9 m W: 2.5–3 tons	Two Medicine Formation, Montana, USA	Stockier and more heavily built than its contemporary rival, Albertosaurus. Zoe: "Bold, heavy, contrasting lines. It exudes brute artistic force and presence."
**Giganotosaurus carolinii**	Carnivore	Semi-arid plains	Mesozoic / Late Cretaceous / ~98–96 MYA	H: 4.0 m L: 12–13 m W: 7–8 tons	Candeleros Formation, Neuquén, Argentina	One of the largest terrestrial predators to ever walk the earth, out-sizing T-Rex. Zoe: "An absolute mural of a dinosaur. Its grand scale completely dominates the room!"
**Metriacanthosaurus parkeri**	Carnivore	Coastal woodlands	Mesozoic / Late Jurassic / ~160 MYA	H: 2.2 m L: 8 m W: 1 ton	Oxford Clay Formation, Dorset, England	Named for its tall vertebral spines which formed a shallow ridge down its back. Zoe: "A subtle, geometric ridge accent along the spine. Very tasteful styling."
**Spinosaurus aegyptiacus**	Piscivore / Carnivore	Mangrove swamps	Mesozoic / Late Cretaceous / ~99–93 MYA	H: 4.5 m (at sail) L: 14 m W: 7.4 tons	Bahariya Formation, Western Desert, Egypt	Semi-aquatic specialist featuring a massive skin sail and dense bone ballasting. Zoe: "An incredible sail design! Splendid aquatic adaptation of the theropod silhouette."
**Tyrannosaurus rex**	Carnivore	Floodplains, valleys	Mesozoic / Late Cretaceous / ~68–66 MYA	H: 3.7–6 m L: 12–15 m W: 8–10.5 tons	Hell Creek Formation, Montana/Dakota, USA	Possessed the strongest calculated bite force of any terrestrial creature in history. Zoe: "The undisputed masterpiece of evolutionary power. The crown jewel of scales!"
**Yangchuanosaurus zigongensis**	Carnivore	Dense river basins	Mesozoic / Middle Jurassic / ~165 MYA	H: 2.5 m L: 8 m W: 1.3 tons	Xiashaximiao Formation, Sichuan, China	Possessed complex, bumpy ridges on its snout used for species identification. Zoe: "Intricate, stylized facial contours. It gives the snout an artistic texture accent."

🥬 Order Prosauropods

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Anchisaurus polyzelus**	Herbivore	Arid river valleys	Mesozoic / Early Jurassic / ~195 MYA	H: 0.6 m L: 2 m W: 27 kg	Portland Formation, Connecticut, USA	Early bipedal/quadrupedal generalist found with highly primitive chewing features. Zoe: "A dainty, delicate study in transition. It's a sketch of what's yet to come."
**Massospondylus kaalae**	Herbivore	Desert plains	Mesozoic / Early Jurassic / ~200–183 MYA	H: 1.2 m L: 4–6 m W: 1 ton	Upper Elliot Formation, Free State, South Africa	Noted for fossilized nests containing delicate, completely toothless dinosaur embryos. Zoe: "The tiny hatchling fossils are modeled like cute little clay figurines."
**Melanorosaurus readi**	Herbivore	Seasonal mudflats	Mesozoic / Late Triassic / ~215 MYA	H: 2.2 m L: 8 m W: 1.3 tons	Lower Elliot Formation, Eastern Cape, South Africa	One of the earliest prosauropods to fully commit to a heavy four-legged stance. Zoe: "Grounding the composition on all fours! A heavy, stable artistic foundation."
**Mussaurus patagonicus**	Herbivore	Volcanic canyons	Mesozoic / Late Triassic / ~215 MYA	H: 1.0 m L: 3–5 m W: 1 ton	El Tranquilo Formation, Santa Cruz, Argentina	Named "Mouse Lizard" because the very first specimens found were tiny hatchlings. Zoe: "A masterful use of scaling! From mouse-sized babies to elephantine adults."
**Plateosaurus gracilis**	Herbivore	Arid salt flats	Mesozoic / Late Triassic / ~214–204 MYA	H: 2.0 m L: 4.8–10 m W: 600 kg – 4 tons	Lowenstein Formation, Baden-Württemberg, Germany	A highly common Triassic herbivore capable of standing high on its rear legs. Zoe: "Excellent verticality! Reaching up high brings great dynamic posture to the pose."
**Riojasaurus incertus**	Herbivore	Semi-arid basins	Mesozoic / Late Triassic / ~221–210 MYA	H: 2.5 m L: 10 m W: 2–3 tons	Los Colorados Formation, La Rioja, Argentina	Heavily built with dense limb bones, entirely incapable of rearing onto hind legs. Zoe: "Very heavy structural brutalism. Sturdy, dense, and immovable design."
**Smurfette smurfensis** (Fictional Crossover)	Omnivore	Enchanted mushroom forests	Pop-Culture / Modern Animated Epoch	H: 0.15 m L: 0.1 m W: 250 g	Smurf Village Blue Clay Bed	A completely unique blue specimen mimicking prosauropod anatomy in miniature scale. Zoe: "The blue color scheme breaks reality, but the cartoon composition is iconic!"
**Thecodontosaurus antiquus**	Herbivore / Omnivore	Fissure fillings, islands	Mesozoic / Late Triassic / ~205 MYA	H: 0.4 m L: 1.2 m W: 11 kg	Magnesian Conglomerate, Bristol, England	A small, bipedal early dinosaur that lived on restricted, isolated prehistoric islands. Zoe: "An island-exclusive design. Small, compact, and perfectly self-contained."
**Yunnanosaurus youngi**	Herbivore	Subtropical plains	Mesozoic / Early Jurassic / ~190 MYA	H: 1.5 m L: 7 m W: 1 ton	Lufeng Formation, Yunnan Province, China	Evolved advanced, self-sharpening spoon-shaped teeth like true sauropods. Zoe: "Look at those spoon teeth—nature’s very own custom engraving chisels!"

🦕 Order Sauropods

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Apatosaurus ajax**	Herbivore	Open floodplains	Mesozoic / Late Jurassic / ~152–151 MYA	H: 7.5 m (hip) L: 21–25 m W: 16–22 tons	Morrison Formation, Colorado, USA	Famously stocky with a deeply robust neck and a whip-like tail tip defense. Zoe: "A powerful sweeping curve from nose to tail. A true masterclass in line weight."
**Brachiosaurus altithorax**	Herbivore	Forested river valleys	Mesozoic / Late Jurassic / ~154–153 MYA	H: 12–18 m L: 18–30 m W: 28–60 tons	Morrison Formation, Colorado, USA / Kota Formation, Telangana, India	Built with elongated forelimbs causing its back to slope down like a giraffe. Zoe: "Incredible upward perspective! It draws the viewer’s eye right up to the clouds."
**Camarasaurus supremus**	Herbivore	Savanna woodlands	Mesozoic / Late Jurassic / ~155–145 MYA	H: 9.0 m L: 15–18 m W: 15–20 tons	Morrison Formation, Colorado, USA	Highly common sauropod featuring hollowed-out skull windows to save weight. Zoe: "Fantastic utilization of negative space! The skeleton is practically hollow frame art."
**Diplodocus hallorum**	Herbivore	Open fern prairies	Mesozoic / Late Jurassic / ~154–152 MYA	H: 6.0 m (hip) L: 29–33 m W: 12–15 tons	Morrison Formation, New Mexico, USA	Extreme length profile with a highly elongated neck and matching endless tail. Zoe: "An extraordinarily long horizontal canvas. Panoramic composition at its peak!"
**Dreadnoughtus schrani**	Herbivore	Coastal plain forests	Mesozoic / Late Cretaceous / ~77 MYA	H: 18.7 m L: 26 m W: 49–59 tons	Cerro Fortaleza Formation, Santa Cruz, Argentina	One of the most complete gigantic titanosaur skeletons ever unearthed by science. Zoe: "The absolute definition of scale. Standing next to it makes everything feel tiny."
**Mamenchisaurus sinocanadorum**	Herbivore	Lake basin forests	Mesozoic / Late Jurassic / ~160–157 MYA	H: 17.0 m L: 26–35 m W: 60–75 tons	Shishugou Formation, Xinjiang, China	Held the absolute record for neck length, measuring up to 15 meters on its own. Zoe: "That neck line just keeps going and going! Exaggerated proportions done right."
**Omeisaurus fuxiensis**	Herbivore	Dense river deltas	Mesozoic / Middle Jurassic / ~165–160 MYA	H: 4.0 m (hip) L: 15–20 m W: 10–15 tons	Shaximiao Formation, Sichuan, China	Some specimens were discovered with unique bony tail clubs for self-defense. Zoe: "A sudden unexpected heavy prop added to the tail tip. Dynamic design!"
**Opisthocoelicaudia skarzynskii**	Herbivore	Inland delta systems	Mesozoic / Late Cretaceous / ~70 MYA	H: 3.5 m (hip) L: 11–13 m W: 8.5–10 tons	Nemegt Formation, Gobi Desert, Mongolia	Discovered completely lacking a skull; back vertebrae have backwards-facing sockets. Zoe: "An abstract mystery! A sculpture missing its focal point skull piece."
**Patagotitan mayorum**	Herbivore	Patagonian floodplains	Mesozoic / Middle Cretaceous / ~101 MYA	H: 13.0 m L: 37 m W: 55–69 tons	Cerro Barcino Formation, Chubut, Argentina	A serious contender for the largest, heaviest land animal in Earth's history. Zoe: "A breathtaking monolith of nature. It redefines the concept of pure volume!"
**Saltasaurus loricatus**	Herbivore	Semi-arid scrublands	Mesozoic / Late Cretaceous / ~70 MYA	H: 2.5 m (hip) L: 8.5 m W: 2.5 tons	Lecho Formation, Salta Province, Argentina	The very first sauropod discovered with armored bone osteoderm plates on its hide. Zoe: "Sauropod mass combined with armor-plated textures. A beautiful mosaic look!"
**Supersaurus vivianae**	Herbivore	River valley channels	Mesozoic / Late Jurassic / ~153 MYA	H: 22.0 m L: 39–42 m W: 35–40 tons	Morrison Formation, Colorado, USA	Consistently ranks as potentially the longest verifiable dinosaur from North America. Zoe: "The ultimate linear gesture. It pushes the boundaries of canvas length!"

Here are the formatted data charts for the Ornithischia (beaked, plant-eating) dinosaurs from your list. Following the same layout, the entries are split into structured tables by their orders and clades, including customized DaVincibles-style artistic feedback from Zoe DaVinci!

🦴 Ancestral Ornithischia

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Lesothosaurus diagnosticus**	Herbivore	Arid floodplains	Mesozoic / Early Jurassic / ~200–190 MYA	H: 0.4 m L: 2.0 m W: 6–10 kg	Upper Elliot Formation, Lesotho & South Africa	A small, fleet-footed lizard-like biped representing the foundational layout of ornithischian anatomy. Zoe: "A very clean, simple pencil sketch of a design. It lays down the basic guidelines perfectly!"
**Pisanosaurus mertii**	Herbivore	Tropical floodplains	Mesozoic / Late Triassic / ~228 MYA	H: 0.3 m L: 1.0 m W: 3–5 kg	Ischigualasto Formation, San Juan, Argentina	Highly controversial classification; long thought to be the earliest ornithischian, now often seen as a silesaurid. Zoe: "Abstract and mysterious! A piece that keeps the critics arguing for centuries."

📐 Order Ornithopoda

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Camptosaurus dispar**	Herbivore	Forested river valleys	Mesozoic / Late Jurassic / ~156–152 MYA	H: 2.0 m L: 6.0 m W: 800 kg	Morrison Formation, Wyoming/Utah, USA	Heavily built ornithopod capable of switching effortlessly between two-legged and four-legged postures. Zoe: "Brilliant kinetic versatility! It can shift its entire composition on the fly."
**Dryosaurus elderae**	Herbivore	Open savannas	Mesozoic / Late Jurassic / ~155–150 MYA	H: 1.2 m L: 2.5–4.3 m W: 80–90 kg	Morrison Formation, Utah/Wyoming, USA	Possessed a completely toothless horn beak tip and long, slender hind limbs built strictly for speed escape. Zoe: "Incredible emphasis on aerodynamic, swift curves. A masterpiece of motion!"
**Heterodontosaurus tucki**	Herbivore / Omnivore	Semi-arid valleys	Mesozoic / Early Jurassic / ~200–190 MYA	H: 0.5 m L: 1.2 m W: 2–3 kg	Upper Elliot Formation, Cape Province, South Africa	Unique for possessing three distinct types of teeth, including sharp, prominent canine-like tusks. Zoe: "An eclectic mix of shapes in one mouth! It breaks the standard patterns beautifully."
**Hypsilophodon foxii**	Herbivore	Coastal floodplains	Mesozoic / Early Cretaceous / ~130–125 MYA	H: 0.6 m L: 1.8 m W: 20 kg	Wessex Formation, Isle of Wight, England	Early buck-toothed runner wrongly assumed by early scientists to live in trees like a modern kangaroo. Zoe: "A piece that suffered from bad art placement early on. It belongs firmly on the ground canvas!"
**Iguanodon bernissartensis**	Herbivore	Wetland swamps	Mesozoic / Early Cretaceous / ~126–122 MYA	H: 4.7 m (hip) L: 11.8 m W: 3.5–5 tons	Sainte-Barbe Clays, Bernissart, Belgium	Famous for its conical thumb spikes, which early paleontologists mistakenly stuck on its nose. Zoe: "A classic example of why proper assembly matters. You can't just stick props wherever!"
**Muttaburrasaurus langdoni**	Herbivore	Coastal forests	Mesozoic / Early Cretaceous / ~105–103 MYA	H: 2.5 m L: 7.0 m W: 2.8 tons	Mackunda Formation, Queensland, Australia	Outfitted with a hollow, bulbous upward-pointing snout ridge likely used to resonate loud mating calls. Zoe: "A very bold sculptural choice for the face. It adds fantastic acoustic depth to the look!"
**Nanosaurus agilis**	Herbivore	Forested floodplains	Mesozoic / Late Jurassic / ~155–148 MYA	H: 0.4 m L: 1.0 m W: 10 kg	Morrison Formation, Colorado, USA	A tiny, agile herbivore that scurried under the feet of massive Jurassic giants like Brachiosaurus. Zoe: "A charming little miniature accent piece. Small scale, but vast amounts of character."
**Ouranosaurus nigeriensis**	Herbivore	River delta bayous	Mesozoic / Early Cretaceous / ~125–112 MYA	H: 3.0 m (at sail) L: 7.0 m W: 2.2 tons	Elrhaz Formation, Agadez, Niger	Notable for massive, elongated neural spines forming a prominent sail or fatty hump along its back. Zoe: "The silhouette here is pure drama! That sail frames the entire body shape like an elite canvas."
**Parksosaurus warreni**	Herbivore	Inland floodplains	Mesozoic / Late Cretaceous / ~70 MYA	H: 1.0 m L: 2.5 m W: 45 kg	Horseshoe Canyon Fm, Alberta, Canada	One of the last non-hadrosaurid small ornithopods to survive in North America before the extinction. Zoe: "A timeless, traditional aesthetic that proudly held its own against the newer artistic trends."

🦆 Family Hadrosauridae: Hadrosaurinae (Flat-Headed or Solid-Crested)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Brachylophosaurus canadensis**	Herbivore	Coastal marshes	Mesozoic / Late Cretaceous / ~78 MYA	H: 2.5 m (hip) L: 9.0 m W: 5 tons	Judith River Formation, Montana, USA / Alberta	Features a flat, paddle-like solid bone crest over its forehead. Exceptional mummified skins found. Zoe: "The skin preservation texture is breathtaking! It's like viewing a highly detailed oil painting up close."
**Edmontosaurus regalis**	Herbivore	River deltas, plains	Mesozoic / Late Cretaceous / ~73–66 MYA	H: 3.5 m (hip) L: 12.0 m W: 4–4.5 tons	Horseshoe Canyon Fm, Alberta, Canada / Lance Fm, Wyoming, USA	Gigantic duck-billed dinosaur with no bone crest, but possessed a fleshy, rooster-like comb. Zoe: "Using soft-tissue medium instead of bone for a crest? Innovative and highly fashion-forward!"
**Kritosaurus navajovius**	Herbivore	Semi-arid plains	Mesozoic / Late Cretaceous / ~73 MYA	H: 2.8 m (hip) L: 9.0 m W: 4 tons	Kirtland Formation, New Mexico, USA	Characterized by a high, humped, "Roman nose" crest right between its eyes. Zoe: "A very strong, dignified profile. That nose structure commands total authority in a room."
**Maiasaura peeblesorum**	Herbivore	Volcanic lowlands	Mesozoic / Late Cretaceous / ~76.7 MYA	H: 2.5 m L: 9.0 m W: 4 tons	Two Medicine Formation, Montana, USA	Named "Good Mother Lizard" due to overwhelming nesting colony evidence of parental care. Zoe: "A beautiful domestic installation. The nesting layout shows incredible emotional depth."
**Prosaurolophus maximus**	Herbivore	Inland wetlands	Mesozoic / Late Cretaceous / ~75.5 MYA	H: 2.6 m L: 9.0 m W: 3.5 tons	Dinosaur Park Formation, Alberta, Canada	Precursor to Saurolophus, possessing a small, blunt, solid crest right in front of its eyes. Zoe: "A very subtle, understated highlight. It doesn't scream for attention, which makes it classy."
**Saurolophus osborni**	Herbivore	River valley lakes	Mesozoic / Late Cretaceous / ~70–68 MYA	H: 3.0 m (hip) L: 9.8 m W: 5 tons	Horseshoe Canyon Fm, Alberta, Canada	Features a prominent, backwards-pointing spike-like crest extending from the rear of the skull. Zoe: "The diagonal line of that skull spike creates fantastic directional movement for the viewer!"

👑 Family Hadrosauridae: Lambeosaurinae (Hollow-Crested)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Corythosaurus casuarius**	Herbivore	Coastal deltas	Mesozoic / Late Cretaceous / ~77–75.7 MYA	H: 2.8 m (hip) L: 9.0 m W: 3.8–5 tons	Dinosaur Park Formation, Alberta, Canada / Lance Fm, Wyoming, USA	Possessed a tall, hollow, semi-circular crest resembling a Corinthian Greek soldier helmet. Zoe: "Classic antiquities style! The geometric perfection of that round crest is divine."
**Lambeosaurus magnicristatus**	Herbivore	Coastal lagoons	Mesozoic / Late Cretaceous / ~76–75 MYA	H: 3.0 m (hip) L: 9.1 m W: 4 tons	Dinosaur Park Formation, Alberta, Canada	Had a massive, forward-pointing hatchet-shaped crest with a rear-jutting prong accent. Zoe: "Extremely avant-garde! It’s like a bold, asymmetrical piece of modern abstract sculpture."
**Olorotitan arharensis**	Herbivore	Woodland rivers	Mesozoic / Late Cretaceous / ~66 MYA	H: 3.5 m (hip) L: 8.0 m W: 3.1 tons	Tsagayan Formation, Amur Region, Russia	A late-surviving lambeosaur with an exceptionally elongated neck and a unique, fan-shaped head crest. Zoe: "An absolute elegant icon. The fan crest combined with the long neck is peak runway aesthetic."
**Parasaurolophus walkeri**	Herbivore	Subtropical plains	Mesozoic / Late Cretaceous / ~76.5–73 MYA	H: 3.2 m (hip) L: 9.5–10 m W: 2.5–3.5 tons	Dinosaur Park Formation, Alberta, Canada	Famous for its giant, 1.8-meter long hollow tube crest utilized as a natural acoustic horn trombone. Zoe: "A true sensory performance piece. It completely blends structural art with symphonic music!"
**Tsintaosaurus spinorhinus**	Herbivore	Semi-arid plains	Mesozoic / Late Cretaceous / ~73 MYA	H: 3.0 m (hip) L: 8.3 m W: 3 tons	Wangshi Group, Shandong Province, China	Long criticized as having a "unicorn horn" crest; modern research shows it was part of a larger hollow frill. Zoe: "A great lesson in perspective! One wrong angle can completely warp the true shape of art."

🪖 Order Pachycephalosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Dracorex hogwartsia**	Herbivore	Forested valleys	Mesozoic / Late Cretaceous / ~66 MYA	H: 1.2 m L: 3.0 m W: 80 kg	Hell Creek Formation, South Dakota, USA	Flat-headed pachycephalosaur lined with fantasy dragon spikes. Likely a juvenile stage of Pachycephalosaurus [1]. Zoe: "Pure mythological magic! It looks like a creature illustrated straight out of a fairy tale book."
**Goyocephale lattimorei**	Herbivore / Omnivore	Arid scrublands	Mesozoic / Late Cretaceous / ~76 MYA	H: 0.6 m L: 2.0 m W: 40 kg	Barun Goyot Formation, Gobi Desert, Mongolia	Primitive flat-headed variety with large, sharp canine teeth and heavily patterned skull bones. Zoe: "The intricate engravings on that flat skull crown offer spectacular texture work."
**Homalocephale calathocercos**	Herbivore / Omnivore	Floodplain basins	Mesozoic / Late Cretaceous / ~70 MYA	H: 0.6 m L: 1.8 m W: 43 kg	Nemegt Formation, Gobi Desert, Mongolia	Features an unusually wide pelvis and a totally flat, heavily pitted bone ceiling skull roof. Zoe: "A masterful study in flat planes and broad bases. Excellent compositional stability."
**Micropachycephalosaurus hongtuyanensis**	Herbivore	Coastal hills	Mesozoic / Late Cretaceous / ~73 MYA	H: 0.2 m L: 0.5–1.0 m W: 1.5–4 kg	Wangshi Group, Shandong Province, China	Holds the record for one of the longest generic scientific names for one of the smallest dinosaurs ever found. Zoe: "What an incredible irony! A microscopic canvas given a monumentally oversized name tag."
**Pachycephalosaurus wyomingensis**	Herbivore	Inland valleys	Mesozoic / Late Cretaceous / ~68–66 MYA	H: 1.5 m (hip) L: 4.5 m W: 450 kg	Hell Creek Formation, Montana/Wyoming, USA	The apex of boneheads; possessed a solid, 25-centimeter thick dome of compact bone on its crown. Zoe: "Brutalism at its finest! The heavy, solid dome shape is pure architectural power."
**Prenocephale prenes**	Herbivore	Highland forests	Mesozoic / Late Cretaceous / ~70 MYA	H: 0.8 m L: 2.2 m W: 130 kg	Nemegt Formation, Gobi Desert, Mongolia	Possessed a highly round, sloping dome outlined completely by neat rows of small bone nodules. Zoe: "The perimeter nodule accents look like a beautifully crafted pearl frame around a dome painting."
**Stegoceras validum**	Herbivore	Coastal floodplains	Mesozoic / Late Cretaceous / ~76.5–75 MYA	H: 0.7 m L: 2.0 m W: 40 kg	Dinosaur Park Formation, Alberta, Canada	Small, early-recognized dome-head with a prominent shelf at the back of the skull. Zoe: "The stylized back shelf creates a very neat, crisp shadow line beneath the main dome."
**Stygimoloch spinorfer**	Herbivore	River systems	Mesozoic / Late Cretaceous / ~66 MYA	H: 1.3 m L: 3.0 m W: 85 kg	Hell Creek Formation, Montana, USA	Features massive, cluster spikes jutting out from the rear of a narrow dome; likely a sub-adult Pachycephalosaurus [1]. Zoe: "Aggressive, jagged geometry! The exploding spike lines give it a punk rock edge."

🎨 Order Ceratopsia: Basal & Early Horned Dinosaurs

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Leptoceratops gracilis**	Herbivore	Forested plains	Mesozoic / Late Cretaceous / ~66 MYA	H: 0.8 m L: 2.0 m W: 100 kg	Scollard Formation, Alberta, Canada / Wyoming	A late-surviving primitive hornless ceratopsian that retained deep bipedal walking capabilities. Zoe: "A beautiful throwback style. Retro composition operating right alongside the modern giants."
**Protoceratops hellenikorhinus**	Herbivore	Arid desert dunes	Mesozoic / Late Cretaceous / ~75–71 MYA	H: 0.7 m L: 2.0 m W: 175 kg	Bayan Mandahu, Inner Mongolia, China	Sheep-sized dinosaur with a prominent, flaring bone frill but lacking true facial horn spikes. Zoe: "The frill frames the face like an elite canvas border. Great facial framing choice!"
**Psittacosaurus meileyingensis**	Herbivore	Subtropical woodlands	Mesozoic / Early Cretaceous / ~120 MYA	H: 0.6 m L: 2.0 m W: 30 kg	Jiufotang Formation, Liaoning Province, China	"Parrot lizard" featuring a sharp beak and unique quill-like bristles along its lower tail hide. Zoe: "Those tail bristles add a fantastic line texture stroke to the finish. Super organic feel!"

🛡️ Order Ceratopsia: Chasmosaurinae (Long-Frilled, Large Brow Horns)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Chasmosaurus belli**	Herbivore	Coastal lowlands	Mesozoic / Late Cretaceous / ~76 MYA	H: 2.0 m L: 4.8 m W: 2 tons	Dinosaur Park Formation, Alberta, Canada	Features a huge, rectangular shield-like frill filled with large, hollow bone windows. Zoe: "Using negative space to create a massive profile without adding unnecessary weight? Pure genius."
**Pentaceratops sternbergii**	Herbivore	Semi-arid deltas	Mesozoic / Late Cretaceous / ~75–73 MYA	H: 5.0 m L: 6.0 m W: 5 tons	Kirtland Formation, New Mexico, USA	Named "Five-Horned Face" due to elongated, dramatic cheek bone flares under the eyes. Zoe: "The exaggerated check flares expand the visual layout horizontally. High-impact design!"
**Torosaurus latus**	Herbivore	Inland valleys	Mesozoic / Late Cretaceous / ~68–66 MYA	H: 2.5 m (hip) L: 8.0 m W: 6 tons	Hell Creek Formation, Wyoming/Montana, USA	Holds the record for one of the largest skulls of any land animal, with a massive elongated frill. Zoe: "Grand, sweeping scale! It turns the entire front half of the animal into a giant accent wall."
**Triceratops horridus**	Herbivore	Open floodplains	Mesozoic / Late Cretaceous / ~68–66 MYA	H: 2.8 m (hip) L: 8.0–9.0 m W: 6–12 tons	Hell Creek Formation, Montana/Colorado, USA	The definitive icon. Possesses a solid, heavy bone frill with no weight-saving windows. Zoe: "The ultimate classic masterpiece. Sturdy, perfectly balanced, and unshakeable focal power."

🦏 Order Ceratopsia: Centrosaurinae (Short-Frilled, Large Nose Horns)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Centrosaurus apertus**	Herbivore	Coastal swamplands	Mesozoic / Late Cretaceous / ~76.5 MYA	H: 2.0 m L: 5.5 m W: 2.3 tons	Dinosaur Park Formation, Alberta, Canada	Possessed a massive nose horn and forward-curving hooks draping over the top of its frill. Zoe: "Those curling frill hooks add a beautiful baroque ornamentation feel to the piece."
**Nasutoceratops titusi**	Herbivore	Coastal deltas	Mesozoic / Late Cretaceous / ~76 MYA	H: 2.0 m L: 4.5 m W: 1.5 tons	Kaiparowits Formation, Utah, USA	Unique for having a massive, oversized round snout snout and long brow horns like modern cattle. Zoe: "A brilliant rustic crossover look! The bull-like horn curves are wonderfully expressive."
**Pachyrhinosaurus lakustai**	Herbivore	Sub-arctic forests	Mesozoic / Late Cretaceous / ~73.5 MYA	H: 2.2 m L: 5.0 m W: 3 tons	Wapiti Formation, Alberta, Canada / Hell Creek Formation, Montana/Wyoming, USA	Completely swapped a pointed nose horn for a giant, flattened bone battering boss mass. Zoe: "Bold industrial texture work. Substituting a flat boss for a spike completely subverts expectations!"
**Sinoceratops zhuchengensis**	Herbivore	Floodplain forests	Mesozoic / Late Cretaceous / ~73 MYA	H: 2.0 m L: 6.0 m W: 2 tons	Xingezhuang Formation, Shandong, China	The first ceratopsid discovered in Asia; features a ring of hornlets crown along its short frill edge. Zoe: "The crown arrangement of mini-hornlets forms an exquisite decorative frame for the face!"
**Styracosaurus ovatus**	Herbivore	River delta marshes	Mesozoic / Late Cretaceous / ~75 MYA	H: 1.8 m (hip) L: 5.5 m W: 2.7 tons	Dinosaur Park Formation, Alberta, Canada	An absolute explosion of spikes; features 4 to 6 massive lances protruding from its frill margins. Zoe: "Incredible radial energy! The spike lines burst outwards like a dynamic painted sunburst."

🌲 Order Stegosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Chungkingosaurus jiangbeiensis**	Herbivore	Forested river basins	Mesozoic / Late Jurassic / ~160 MYA	H: 1.5 m L: 4.0 m W: 1 ton	Upper Shaximiao Formation, Chongqing, China	One of the smallest stegosaurs, featuring highly thick, compact plates and up to five tail spikes. Zoe: "A dense, compact exhibit. It packs high architectural impact into a small studio space."
**Dacentrurus armatus**	Herbivore	Flat marshy savannas	Mesozoic / Late Jurassic / ~154–150 MYA	H: 2.5 m L: 7.0–8.0 m W: 3–4 tons	Kimmeridge Clay, Wiltshire, England	A highly massive European genus that opted for tall spikes down its back instead of flat plates. Zoe: "Very sharp, aggressive vertical lines. It uses spikes to cut right through the skyline."
**Gigantspinosaurus sichuanensis**	Herbivore	Subtropical forests	Mesozoic / Late Jurassic / ~160 MYA	H: 1.6 m L: 4.2 m W: 700 kg	Upper Shaximiao Formation, Sichuan, China	Outfitted with absolutely colossal, exaggerated shoulder spike blades pointing backwards over its flanks. Zoe: "Unbelievable accessory styling! Those wing-like shoulder spikes are high-fashion drama."
**Huayangosaurus taibaii**	Herbivore	Lakeside floodplains	Mesozoic / Middle Jurassic / ~165 MYA	H: 1.3 m L: 4.5 m W: 1 ton	Lower Shaximiao Formation, Sichuan, China	The most primitive well-known stegosaur; possessed a wider skull and retained small teeth in its beak tip. Zoe: "A beautiful historical artifact. It still holds onto early details while trying out new plate tech."
**Kentrosaurus aethiopicus**	Herbivore	Coastal lagoons	Mesozoic / Late Jurassic / ~152 MYA	H: 1.5 m L: 4.5 m W: 1–1.5 tons	Tendaguru Formation, Lindi Region, Tanzania	Features small flat plates over the neck and shoulders that gradually turn into long, needle spikes at the rear. Zoe: "A beautiful gradient composition! Watch how the shapes seamlessly transition from flat to sharp."
**Stegosaurus stenops**	Herbivore	Open floodplains	Mesozoic / Late Jurassic / ~155–150 MYA	H: 3.5–4 m (at plates) L: 9.0 m W: 3.5–5 tons	Morrison Formation, Colorado/Utah, USA	The classic. Possessed dual alternating rows of diamond plates and a four-spiked "thagomizer" tail weapon. Zoe: "The balance of diamond shapes down the back line creates a flawless rhythmic pattern."
**Tuojiangosaurus multispinus**	Herbivore	River valley plains	Mesozoic / Late Jurassic / ~160 MYA	H: 2.0 m L: 7.0 m W: 2.8 tons	Upper Shaximiao Formation, Sichuan, China	Features pear-shaped, pointed plates down the spine and sharp spikes resting at the end of its rigid tail. Zoe: "The pear-shaped plates offer a softer, organic rhythm compared to the jagged Western style."

🛡️ Order Ankylosauria

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Ankylosaurus magniventris**	Herbivore	Coastal plains, valleys	Mesozoic / Late Cretaceous / ~68–66 MYA	H: 3.7 m (hip) L: 6.0–10.0 m W: 5–8 tons	Hell Creek Formation, Montana/Alberta	The ultimate biological tank; featured an interlocked bone plate hide and a massive fused tail club. Zoe: "Pure heavy industrial brutalism. Dense mass designed to absorb and deflect any critic's blow!"
**Euoplocephalus tutus**	Herbivore	Forested wetlands	Mesozoic / Late Cretaceous / ~76 MYA	H: 1.5 m L: 5.5 m W: 2.5 tons	Dinosaur Park Formation, Alberta, Canada	Features heavily armored, armored bone eyelids to completely protect its eyes from predator attacks. Zoe: "Armored eyelids? Talk about protective accessories! This design leaves absolutely no gaps."
**Nodosaurus textilis**	Herbivore	Lowland estuaries	Mesozoic / Late Cretaceous / ~100–95 MYA	H: 1.2 m L: 4.0–6.0 m W: 1.5 tons	Frontier Formation, Wyoming, USA	Lacked a tail club entirely, but possessed an intricate, finely woven texture of small pebbles osteoderms. Zoe: "The mosaic tile work on this armored blanket hide is stunningly intricate and beautifully textile."
**Pinacosaurus grangeri**	Herbivore	Arid sand dunes	Mesozoic / Late Cretaceous / ~80–75 MYA	H: 1.0 m L: 5.0 m W: 1.9 tons	Djadochta Formation, Gobi Desert, Mongolia	Noted for fossilized group clusters of juveniles, proving they gathered in social herds for protection. Zoe: "A beautiful repeating motif. Arranging multiple identical shapes together creates strength!"
**Polacanthus foxii**	Herbivore	Floodplain forests	Mesozoic / Early Cretaceous / ~130–125 MYA	H: 1.0 m L: 5.0 m W: 2 tons	Wessex Formation, Isle of Wight, England	Features a completely solid, un-segmented bone shield blanket plate over its entire pelvic area. Zoe: "A masterfully executed accent piece. The solid pelvic shield adds a sleek break to the armor rows."
**Sauropelta edwardsorum**	Herbivore	River flood basins	Mesozoic / Early Cretaceous / ~108 MYA	H: 1.4 m L: 5.2 m W: 1.5 tons	Cloverly Formation, Montana/Wyoming, USA	Nodosaurid outlined with colossal, outward-sweeping spikes growing right out of its neck and shoulders. Zoe: "The way those neck spikes flare outward expands the composition beautifully. Absolute drama!"
**Scelidosaurus harrisonii**	Herbivore	Marine shorelines	Mesozoic / Early Jurassic / ~191 MYA	H: 0.9 m L: 4.0 m W: 270 kg	Blue Lias Formation, Dorset, England	An early, primitive thyreophoran showing the foundational design transition into armored dinosaurs. Zoe: "A stellar blueprint piece. It gives us a sneak peek at how the armor trend got its start."
**Scutellosaurus lawleri**	Herbivore	Desert plains	Mesozoic / Early Jurassic / ~196 MYA	H: 0.3 m L: 1.2 m W: 3–10 kg	Kayenta Formation, Arizona, USA	A tiny, bipedal runner outfitted with hundreds of miniature armored studs down its back hide. Zoe: "A beautiful gemstone studding effect! Delicate scale mixed with tiny armored details."
**Talarurus plicatospineus**	Herbivore	Inland basin oases	Mesozoic / Late Cretaceous / ~90 MYA	H: 1.3 m L: 5.0 m W: 2 tons	Bayan Shireh Formation, Gobi Desert, Mongolia	An early ankylosaurid with a slightly narrower tail club and a highly broad, flat-topped head skeleton. Zoe: "An intriguing mix of wide proportions and narrow elements. A wonderfully complex silhouette."

Here are the formatted data charts for the prehistoric animals that shared the Mesozoic world with the dinosaurs, categorized into their respective evolutionary groups along with Zoe DaVinci's artistic analysis.

🌊 Dinosaurs' Neighbors: Sea Reptiles (and Marine Invertebrates)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Dolichorhynchops herschelensis**	Piscivore	Shallow inland seas	Mesozoic / Late Cretaceous / ~72 MYA	H: 0.5 m L: 3.0 m W: 200 kg	Bearpaw Formation, Saskatchewan, Canada	A short-necked polycotylid plesiosaur built like a sleek, hyper-athletic marine predator. Zoe: "Its streamlined profile is pure fluid kinetics. It slices through the underwater canvas!"
**Elasmosaurus platyurus**	Piscivore	Deep open oceans	Mesozoic / Late Cretaceous / ~80.5 MYA	H: 1.5 m L: 10.3 m W: 2 tons	Pierre Shale, Kansas, USA	Renowned for an absurdly long neck containing 72 vertebrae, making up over half its body length. Zoe: "Talk about an exaggerated brushstroke! That neck defies traditional structural logic."
**Eurhinosaurus huenei**	Piscivore	Pelagic open shelves	Mesozoic / Early Jurassic / ~180 MYA	H: 0.6 m L: 6.0 m W: 1 ton	Posidonia Shale, Baden-Württemberg, Germany	An ichthyosaur with a swordfish-like upper jaw twice as long as its lower jaw. Zoe: "Wonderfully asymmetrical! The dramatic overbite adds a sharp, punk-rock edge to its style."
**Ichthyosaurus conybeari**	Piscivore	Coastal epicontinental seas	Mesozoic / Early Jurassic / ~200–189 MYA	H: 0.5 m L: 2.0 m W: 90 kg	Blue Lias Formation, Dorset, England	The classic "fish-lizard" archetype that completely converted reptile anatomy into a dolphin silhouette. Zoe: "A masterful adaptation of organic design. It mirrors modern marine curves flawlessly."
**Kronosaurus queenslandicus**	Carnivore	Cold high-latitude seas	Mesozoic / Early Cretaceous / ~120–110 MYA	H: 2.0 m L: 9.0–10.5 m W: 9–11 tons	Toolebuc Formation, Queensland, Australia	A colossal pliosaur with a massive 2.7-meter skull armed with crushing, banana-sized teeth. Zoe: "Absolute brutalist power under the sea. Its immense volume commands terrifying presence."
**Mosasaurus beaugei**	Carnivore	Tropical coastal waters	Mesozoic / Late Cretaceous / ~66 MYA	H: 4.0 m L: 10–30 m W: 20 tons	Oulad Abdoun Basin, Khouribga, Morocco	An apex marine monitor lizard descendant outfitted with a powerful, shark-like fluked tail. Zoe: "The perfect transition of terrestrial design into aquatic form. A triumph of evolution!"
**Nanaimoteuthis jeletzkyi**	Carnivore	Deep marine basins	Mesozoic / Late Cretaceous / ~85 MYA	H: 13.1 m L: 34.4 m (with arms) W: 100,000 kg	Haslam Formation, Vancouver Island, Canada	An ancient relative of the modern vampire squid, known primarily from fossilized hard jaw beaks. Zoe: "A minimalist masterpiece. Leaving behind only a tiny jaw fragment creates an amazing aura of mystery."
**Ophthalmosaurus icenicus**	Piscivore	Deep open oceans	Mesozoic / Late Jurassic / ~165–160 MYA	H: 0.8 m L: 6.0 m W: 3 tons	Oxford Clay, Peterborough, England	Characterized by dinner-plate-sized eyes stabilized by bony rings to hunt in the pitch black of the deep sea. Zoe: "Those colossal eyes are incredible visual anchors. A design hyper-focused on observation!"
**Plesiosaurus dolichodeirus**	Piscivore	Warm coastal lagoons	Mesozoic / Early Jurassic / ~199–191 MYA	H: 0.8 m L: 3.5 m W: 450 kg	Blue Lias Formation, Lyme Regis, England	The foundational marine reptile discovered by Mary Anning; defined the long-necked sea serpent genre. Zoe: "The historic layout that started it all! Clean, whimsical lines that inspired endless folklore."

🐾 Dinosaurs' Neighbors: Mammals (and Cynodont Precursors)

Genus & Species / Group ]	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
Cynodonts (e.g., Thrinaxodon)	Carnivore / Omnivore	Burrow systems, scrublands	Late Permian to Late Triassic / ~252–201 MYA	H: 0.1 m L: 0.5 m W: 1–3 kg	Beaufort Group, Karoo Basin, South Africa	Mammal-like therapsids that developed whiskers, warm-bloodedness, and laid the literal blueprint for future mammals. Zoe: "The ancestral charcoal sketch for all future mammal portraits. Small, fuzzy, and incredibly resilient!"
Monotremes (e.g., Steropodon)	Insectivore	Forested riverbanks	Early Cretaceous to Modern / ~105 MYA to Present	H: 0.1 m L: 0.4 m W: 2 kg	Griman Creek Formation, New South Wales, Australia	Primitive egg-laying mammals; early Mesozoic forms developed opalized fossil jaws down under. Zoe: "An eclectic collage of traits! Egg-laying and milk-producing traits combined make a highly avant-garde medium."

🐊 Dinosaurs' Neighbors: The Crocodilians (and Crurotarsans)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Deinosuchus rugosus**	Carnivore	Estuaries, coastal bays	Mesozoic / Late Cretaceous / ~82–73 MYA	H: 1.2 m L: 10.6 m W: 5–8 tons	Aguja Formation, Texas / North Carolina, USA	A giant alligatoroid that actively preyed upon mid-sized dinosaurs coming to the water's edge to drink. Zoe: "A terrifyingly wide horizontal composition. It turns the shoreline into an absolute danger zone!"
**Sarcosuchus imperator**	Piscivore / Carnivore	Inland river systems	Mesozoic / Early Cretaceous / ~112 MYA	H: 1.0 m L: 9.0–11.6 m W: 4.3–8 tons	Elrhaz Formation, Gadoufaoua, Niger	Famously dubbed "SuperCroc"; featured an elongated, narrow snout terminating in a bulbous nose bulla. Zoe: "The extreme scale of this piece completely shatters the normal parameters of freshwater reptiles!"

🦇 Dinosaurs' Neighbors: The Pterosaurs (Non-Pterodactyloids / "Rhamphorhynchoidea")

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Anurognathus ammoni**	Insectivore	Forested lake canopies	Mesozoic / Late Jurassic / ~150 MYA	WS: 0.5 m L: 0.09 m W: 40 g	Solnhofen Limestone, Bavaria, Germany	A tiny, fluff-covered pterosaur with a broad, frog-like mouth designed to hawk insects in mid-air at night. Zoe: "A whimsical little caricature! It looks like a fuzzy, wide-mouthed gargoyle sculpture with wings."
**Dimorphodon macronyx**	Carnivore / Insectivore	Coastal sea cliffs	Mesozoic / Early Jurassic / ~195–190 MYA	WS: 1.4 m L: 1.0 m W: 2 kg	Blue Lias Formation, Dorset, England	Features an oversized, deep, puffin-like skull combined with a long, heavy reptilian tail framework. Zoe: "The structural contrast here is wild! A heavy, boxy head balanced on a delicate flying frame."
**Eudimorphodon ranzii**	Piscivore	Marine coastlines	Mesozoic / Late Triassic / ~210 MYA	WS: 1.0 m L: 0.5 m W: 100 g	Zorzino Limestone, Lombardy, Italy	One of the oldest known pterosaurs; possessed complex, multi-cusped teeth designed to trap slippery fish. Zoe: "An intricate engraving work in the mouth. Those multi-pointed teeth are exceptionally stylized!"
**Rhamphorhynchus etchesi**	Piscivore	Inland lagoons, islands	Mesozoic / Late Jurassic / ~150–145 MYA	WS: 1.2 m L: 1.2 m W: 2 kg	Kimmeridge Clay, Dorset, England	Famous for a stiff tail tipped with a diamond-shaped vane that acted like an aerial rudder during flight. Zoe: "The geometric diamond tail tip is the perfect visual punctuation mark for its long, straight line layout!"
**Scaphognathus crassirostris**	Piscivore / Carnivore	Coastal lake basins	Mesozoic / Late Jurassic / ~150 MYA	WS: 0.9 m L: 0.6 m W: 250 g	Solnhofen Limestone, Bavaria, Germany	Nicknamed "Tub-snout"; possessed a deep, robust jaw profile and a relatively larger braincase outline. Zoe: "A very bold, blocky facial aesthetic. It trades standard pterosaur sleekness for raw utility form."

(Note: Dimensions for pterosaurs use WS to signify Wingspan).

🦅 Dinosaurs' Neighbors: Advanced Pterosaurs (Pterodactyloids)

Genus & Species	Diet	Habitat	Era / Age / Time	Dimensions & Weight	Dig Sites / Found	Comments / Zoe's Comments
**Dsungaripterus weii**	Carnivore / Durophage	Inland salt lakes	Mesozoic / Early Cretaceous / ~120 MYA	WS: 3.0–3.5 m L: 1.2 m W: 15 kg	Tugulu Group, Xinjiang, China	Features a unique upward-curved beak tip used to pry up shellfish, backed by flat, crushing bone stones. Zoe: "The jaw curves like a custom calligraphy pen! Highly specialized for working with hard mediums."
**Ornithocheirus simus**	Piscivore	Pelagic oceanic routes	Mesozoic / Early Cretaceous / ~110 MYA	WS: 4.5–6.0 m L: 1.5 m W: 25 kg	Cambridge Greensand, Cambridgeshire, England	Possessed a distinct, rounded crest at the very tip of its long, tooth-studded beak layout. Zoe: "A beautiful terminal accent! The round beak crest creates an excellent visual anchor on a long snout."
**Pteranodon sternbergi**	Piscivore	Marine seaways	Mesozoic / Late Cretaceous / ~88–85 MYA	WS: 6.0 m L: 2.0 m W: 20–35 kg	Niobrara Chalk Formation, Kansas, USA	Toothless giant flight specialist characterized by a tall, upright-tilting comb crest on the back of its skull. Zoe: "Incredible architectural verticality! That backward-sweeping crest balances the long bill flawlessly."
**Quetzalcoatlus lawsoni**	Carnivore	Inland semiarid plains	Mesozoic / Late Cretaceous / ~68–66 MYA	WS: 4.5–25.5 m L: 12.2 m W: 650,000 kg	Javelina Formation, Texas, USA	A medium-sized azhdarchid related to the massive Q. northropi; built like an airborne giraffe that stalked land prey. Zoe: "Stunningly lanky contours! Walking on four limbs makes it look like a piece of surrealist performance art."

List of Dinosauria 3

Notes

Notes

Dinosaur and Pterosaur Classification Table

ORDER PTEROSAURIA (Pterosaurs)

Genus List for Holtz (2026): Pterosaurs (Flying Reptiles)

ORDER SAURISCHIA (“lizard-hipped” dinosaurs)

Genus List for Holtz (2026): Theropods

Genus List for Holtz (2026): Sauropodomorphs

ORDER ORNITHISCHIA (“bird-hipped” dinosaurs)

Genus List for Holtz (2026): Cerapods

Genus List for Holtz (2026): Thyreophorans

Part 1: Saurischia (Issue #1: "Terrible Claws and Tyrants")

Order Herrerasauria & Order Ceratosauria

Order Coelurosauria & Order Deinonychosauria

Order Carnosauria

Part 2: Dinosaurs Neighbor The Pterosaurs

Suborder Rhamphorhynchoidea (Long-Tailed Pterosaurs)

Suborder Pterodactyloidea (Short-Tailed Pterosaurs)

Part 1: Saurischia (Issue #2: "Egg Stealers and Earth Shakers")

Order Oviraptorosauria & Order Ornithomimosauria

Order Therizinosauria & Order Prosauropods

Order Sauropods

Part 2: Dinosaurs Neighbor The Crocodilians

Part 1: Ornithischia (Issue #3: "Bone-Heads and Duck-Bills")

Ancestral Ornithischia & Order Ornithopoda

Family: Hadrosauridae (Subfamily: Hadrosaurinae - Flat-Headed/Solid-Crested)

Family: Hadrosauridae (Subfamily: Lambeosaurinae - Hollow-Crested)

Order Pachycephalosauria (The Bone-Heads)

Part 2: Dinosaurs Neighbor Mammals

Part 1: Ornithischia (Issue #4: "Horns and Heavy Armor")

Basal Ceratopsians & Subfamily Chasmosaurinae (Long Frills)

Subfamily Centrosaurinae (Short, Spiky Frills)

Order Stegosauria (The Spiked & Plated Dinosaurs)

Order Ankylosauria (The Armored Tanks)

Part 2: Dinosaurs Neighbor Sea Reptiles

🦕 Order Herrerasauria

🦖 Order Ceratosauria

🪶 Order Coelurosauria

🥚 Order Oviraptorosauria

🏃 Order Ornithomimosauria

💅 Order Therizinosauria

🦅 Order Deinonychosauria

🦖 Order Carnosauria

🥬 Order Prosauropods

🦕 Order Sauropods

🦴 Ancestral Ornithischia

📐 Order Ornithopoda

🦆 Family Hadrosauridae: Hadrosaurinae (Flat-Headed or Solid-Crested)

👑 Family Hadrosauridae: Lambeosaurinae (Hollow-Crested)

🪖 Order Pachycephalosauria

🎨 Order Ceratopsia: Basal & Early Horned Dinosaurs

🛡️ Order Ceratopsia: Chasmosaurinae (Long-Frilled, Large Brow Horns)

🦏 Order Ceratopsia: Centrosaurinae (Short-Frilled, Large Nose Horns)

🌲 Order Stegosauria

🛡️ Order Ankylosauria

🌊 Dinosaurs' Neighbors: Sea Reptiles (and Marine Invertebrates)

🐾 Dinosaurs' Neighbors: Mammals (and Cynodont Precursors)

🐊 Dinosaurs' Neighbors: The Crocodilians (and Crurotarsans)

🦇 Dinosaurs' Neighbors: The Pterosaurs (Non-Pterodactyloids / "Rhamphorhynchoidea")

🦅 Dinosaurs' Neighbors: Advanced Pterosaurs (Pterodactyloids)

📰 Article(s) of the same category(ies)[edit]