Prehistoric list

Here is the comprehensive prehistoric profile for your selected prehistoric marine predators, lizards, and ancient fish, organized systematically by order and family.

🦈 Order Lamniformes & Order Arthrodira

Profile Field	Otodus megalodon	Dunkleosteus amblyodoratus
Scientific Name	Otodus megalodon	Dunkleosteus amblyodoratus
Size	15 – 20 meters (49 – 65 ft) long	5 – 6 meters (16 – 20 ft) long
Diet	Carnivore (Whales, sirenians, large fish)	Carnivore (Armored fish, ammonites, sharks)
Habitat	Warm-temperate to tropical coastal & pelagic oceans	Shallow, subtropical epicontinental seas
Where Found / Formation	Worldwide; Yorktown, Bone Valley, Calvert Formations	North America, Europe; Kettle Point Formation
Time	Miocene to Pliocene (23 – 3.6 Ma)	Late Devonian (Famennian, ~360 Ma)
Related Genera	Carcharocles, Otodus, Parotodus	Eastmanosteus, Titanichthys
Chart Table Data
🔹 Meaning	"Giant tooth"	"Dunkle's bone; blunt spear"
🔹 Species	O. megalodon	D. amblyodoratus
🔹 Diet	Apex Marine Carnivore	Apex Marine Macrophage
🔹 Epoch / Stage / Years	Miocene–Pliocene (Zanclean)	Late Devonian (Famennian)
🔹 Origin (Franchise)	Meg, Jurassic Park Explorer, Ark	Feed and Grow: Fish, Hungry Shark
🔹 Estimated L & H	L: 15–20m, H: ~4m (Dorsal fin)	L: 5–6m, H: ~1.5m
🔹 Weight	50 – 100 metric tons	1 – 1.5 metric tons
🔹 Collected	Teeth, isolated vertebral centra	Fragmentary dermal armor plates, gnathal plates
🔹 Status / Author / Year	Valid; Agassiz, 1835	Valid; Carr & Hlavin, 2010
🔹 Area / Locality	Global (USA, Peru, Australia, Japan)	Ontario, Canada; Ohio, USA
🔹 Brian's Comments	The ultimate marine apex predator; its extinction opened the door for modern baleen whale gigantism.	Features a distinctive blunt, spear-like plate configuration that set it apart from D. terrelli.

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🐬 Order Ichthyosauria (Fish-Lizards)

Profile Field	Ichthyosaurus conybeari	Eurhinosaurus huenei	Ophthalmosaurus icenicus
Scientific Name	Ichthyosaurus conybeari	Eurhinosaurus huenei	Ophthalmosaurus icenicus
Size	2 meters (6.5 ft) long	6 meters (20 ft) long	6 meters (20 ft) long
Diet	Piscivore (Fish, small cephalopods)	Piscivore / Teuthivore (Swordfish-like hunter)	Teuthivore (Deep-sea squid, soft fish)
Habitat	Pelagic open oceans & shelf seas	Open marine pelagic zones	Deep pelagic oceans (Deep-diver)
Where Found / Formation	United Kingdom; Blue Lias Formation	Germany, France; Posidonia Shale	UK, Americas; Oxford Clay Formation
Time	Early Jurassic (Hettangian–Sinemurian)	Early Jurassic (Toarcian, ~180 Ma)	Middle to Late Jurassic (~165–160 Ma)
Related Genera	Temnodontosaurus, Stenopterygius	Excalibosaurus, Leptonectes	Arthropterygius, Baptanodon
Chart Table Data
🔹 Meaning	"Fish lizard honoring Conybeare"	"Well-nosed lizard honoring Huene"	"Eye lizard from the Iceni region"
🔹 Species	I. conybeari	E. huenei	O. icenicus
🔹 Diet	Fish and Ammonites	Fish, Squid, Pelagic organisms	Deep-water Squid and Belemnites
🔹 Epoch / Stage / Years	Early Jurassic (~200–195 Ma)	Early Jurassic (Toarcian)	Middle–Late Jurassic (Callovian–Oxfordian)
🔹 Origin (Franchise)	Sea Monsters (BBC), Jurassic World Alive	Ark: Survival Evolved (Mods), Dino Crisis	Walking with Dinosaurs (BBC)
🔹 Estimated L & H	L: 2m, H: 0.5m	L: 6m, H: 1.2m	L: 6m, H: 1.5m
🔹 Weight	80 – 100 kg	1 metric ton	2 – 3 metric tons
🔹 Collected	Articulated skeletons, skulls	Complete articulated skeletons	Well-preserved three-dimensional skulls
🔹 Status / Author / Year	Valid; Lydekker, 1888	Valid; Abel, 1909	Valid; Seeley, 1874
🔹 Area / Locality	Lyme Regis, Dorset, England	Holzmaden, Baden-Württemberg, Germany	Peterborough, England; Wyoming, USA
🔹 Brian's Comments	Classic British ichthyosaur species named to honor early geologist William Conybeare.	Unbelievable extreme overbite, mimicking a modern sawfish or swordfish to slash prey.	Massive sclerotic rings protect eyes the size of dinner plates, built for hunting in total darkness.

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🦕 Order Plesiosauria (Family Plesiosauridae)

Profile Field	Elasmosaurus platyurus	Plesiosaurus dolichodeirus	Trinacromerum kirki
Scientific Name	Elasmosaurus platyurus	Plesiosaurus dolichodeirus	Trinacromerum kirki
Size	10.3 meters (34 ft) long	3.5 meters (11.5 ft) long	3 meters (10 ft) long
Diet	Piscivore (Small fish, cephalopods)	Piscivore (Fish, belemnites)	Fast-swimming Piscivore (Pelagic fish)
Habitat	Shallow epicontinental seaways	Coastal marine environments	Western Interior Seaway (Pelagic)
Where Found / Formation	Kansas, USA; Pierre Shale	Dorset, England; Blue Lias	Kansas, USA; Greenhorn Limestone
Time	Late Cretaceous (Campanian, ~80 Ma)	Early Jurassic (Sinemurian, ~199 Ma)	Late Cretaceous (Cenomanian–Turonian)
Related Genera	Styxosaurus, Albertonectes	Hydrorion, Microcleidus	Dolichorhynchops, Polycotylus
Chart Table Data
🔹 Meaning	"Thin-plate lizard with a flat tail"	"Near-to-lizard with a long neck"	"Three-tipped femur honoring Kirk"
🔹 Species	E. platyurus	P. dolichodeirus	T. kirki
🔹 Diet	Schooling fish, soft cephalopods	Small fish, squid, bottom-dwellers	Fast pelagic fish, squid
🔹 Epoch / Stage / Years	Late Cretaceous (Campanian)	Early Jurassic (Sinemurian)	Late Cretaceous (~93 Ma)
🔹 Origin (Franchise)	Chased by Sea Monsters, Ark, JWE2	Jurassic Park (Kenner), Dino Dan	Sea Monsters: A Prehistoric Adventure
🔹 Estimated L & H	L: 10.3m, H: 1.5m (Body)	L: 3.5m, H: 0.6m	L: 3m, H: 0.7m
🔹 Weight	2 metric tons	400 – 450 kg	300 – 400 kg
🔹 Collected	Holotype skeleton (missing skull)	Complete skeletons found by Mary Anning	Nearly complete articulated skeletons
🔹 Status / Author / Year	Valid; Cope, 1868	Valid; Conybeare, 1824	Valid; Morrow, 1935
🔹 Area / Locality	Logan County, Kansas, USA	Lyme Regis, Dorset, England	Russell County, Kansas, USA
🔹 Brian's Comments	Famously reconstructed with the head on the tail end by Edward Drinker Cope during the Bone Wars.	The fundamental species discovered by Mary Anning that proved the reality of ancient marine reptiles.	A short-necked polycotylid plesiosaur built like an underwater torpedo for rapid pursuits.

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🐊 Order Plesiosauria (Family Pliosauridae)

Profile Field	Attenborosaurus conybeari	Kronosaurus queenslandicus	Liopleurodon ferox
Scientific Name	Attenborosaurus conybeari	Kronosaurus queenslandicus	Liopleurodon ferox
Size	5 meters (16.4 ft) long	9 – 10.5 meters (30 – 34 ft) long	5 – 7 meters (16 – 23 ft) long
Diet	Piscivore / Generalist Carnivore	Apex Carnivore (Plesiosaurs, turtles)	Apex Carnivore (Fish, marine reptiles)
Habitat	Warm, shallow epicontinental seas	High-latitude, cool marine shelves	Shallow epicontinental coastal seas
Where Found / Formation	Dorset, England; Charmouth Mudstone	Queensland, Australia; Toolebuc Formation	England, France; Oxford Clay
Time	Early Jurassic (Sinemurian, ~196 Ma)	Early Cretaceous (Albian, ~110 Ma)	Middle to Late Jurassic (~165–155 Ma)
Related Genera	Pliosaurus, Peloneustes	Brachauchenius, Megacephalosaurus	Simolestes, Pliosaurus
Chart Table Data
🔹 Meaning	"David Attenborough's lizard"	"Titan Kronos' lizard from Queensland"	"Smooth-sided teeth, ferocious"
🔹 Species	A. conybeari	K. queenslandicus	L. ferox
🔹 Diet	Fish, small marine vertebrates	Marine reptiles, giant ammonites, fish	Large fish, ichthyosaurs, plesiosaurs
🔹 Epoch / Stage / Years	Early Jurassic (Sinemurian)	Early Cretaceous (Aptian–Albian)	Middle–Late Jurassic (Callovian)
🔹 Origin (Franchise)	Jurassic World Evolution 2	Ark: Survival Evolved, JWE2	Walking with Dinosaurs (BBC)
🔹 Estimated L & H	L: 5m, H: 0.8m	L: 9–10.5m, H: 2.2m	L: 5–7m, H: 1.5m
🔹 Weight	1 metric ton	10 – 11 metric tons	1.5 – 3 metric tons
🔹 Collected	Plaster cast (Original destroyed in WWII)	Fragmentary skull and skeleton parts	Skulls, teeth, well-preserved skeletons
🔹 Status / Author / Year	Valid; Bakker, 1993	Valid; Longman, 1924	Valid; Sauvage, 1873
🔹 Area / Locality	Lyme Regis, Dorset, England	Hughenden, Queensland, Australia	Peterborough, UK; Normandy, France
🔹 Brian's Comments	Originally classified as Plesiosaurus, Robert Bakker re-evaluated it as a unique basal pliosaur.	Possessed a massive 2.7-meter skull armed with crushing, banana-sized teeth.	Pop culture overblown size estimates (25m) were scaled down by modern paleontology to a still-deadly 7m.

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🦎 Order Squamata (Snakes, Lizards, and True Mosasaurs)

Profile Field	Clidastes propython	Jormungandr walhallaensis	Mosasaurus beaugei	Megalania priscus (Varanus priscus)
Scientific Name	Clidastes propython	Jormungandr walhallaensis	Mosasaurus beaugei	Varanus priscus
Size	2 – 4 meters (6.5–13 ft) long	7.3 meters (24 ft) long	8 – 40 meters (26–130 ft) long	5.5 – 7 meters (18–23 ft) long
Diet	Small fish, cephalopods	Generalist marine carnivore	Apex predator (Reptiles, sharks)	Carnivore (Large marsupials, birds)
Habitat	Shallow coastal waters, bays	Transmarginal inland seaways	Deep & shallow warm oceans	Terrestrial open forests, woodlands
Where Found / Formation	USA; Mooreville Chalk, Niobrara	North Dakota, USA; Pierre Shale	Morocco; Oulad Abdoun Basin	Australia; King Creek, Darling Downs
Time	Late Cretaceous (Coniacian–Campanian)	Late Cretaceous (Campanian, ~73 Ma)	Late Cretaceous (Maastrichtian, ~66 Ma)	Pleistocene (2 Ma – 40,000 years ago)
Related Genera	Mosasaurus, Globidens	Mosasaurus, Clidastes	Tylosaurus, Plotosaurus	Varanus komodoensis (Komodo dragon)
Chart Table Data
🔹 Meaning	"Locked-key vertebrae archetype"	"Midgard Serpent from Walhalla"	"Meuse River lizard; Beaugé's"	"Ancient giant roamer"
🔹 Species	C. propython	J. walhallaensis	M. beaugei	V. priscus
🔹 Diet	Small agile fish, sea birds	Fish, smaller marine reptiles	Sharks, plesiosaurs, mosasaurs	Mega-fauna, giant wombats
🔹 Epoch / Stage / Years	Late Cretaceous (~85–80 Ma)	Late Cretaceous (Campanian)	Late Cretaceous (Maastrichtian)	Pleistocene Epoch
🔹 Origin (Franchise)	Sea Monsters (BBC Game)	Path of Titans, Indie Fossil Media	Jurassic World (Franchise cousin)	Ark, Monsters We Met (BBC)
🔹 Estimated L & H	L: 3m, H: 0.4m	L: 7.3m, H: 1.2m	L: 40m, H: 5.8m	L: 6m, H: 1.3m
🔹 Weight	100 – 200 kg	1.5 metric tons	4 – 5 metric tons	600 – 1,900 kg
🔹 Collected	Complete articulated skeletons	Exceptionally complete skull, spine	Skulls, isolated jaw structures	Osteoderms, vertebrae, partial limbs
🔹 Status / Author / Year	Valid; Cope, 1869	Valid; Zietlow et al., 2023	Valid; Arambourg, 1952	Valid; Owen, 1859
🔹 Area / Locality	Alabama, Kansas, South Dakota	Walhalla, North Dakota, USA	Khouribga Province, Morocco	Queensland, New South Wales
🔹 Brian's Comments	An agile, slim coastal swimmer; one of the earliest well-studied true mosasaurs.	A crucial transitional link bridging smaller mosasaurs like Clidastes with true giants.	A stocky, thick-skulled Moroccan powerhouse specialized in crunching armored prey.	The largest terrestrial lizard known to science, which coexisted with early Indigenous Australians.

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Family Dimorphodontidae & Eudimorphodontidae

Profile Field	Dimorphodon macronyx	Dorygnathus banthensis	Eudimorphodon ranzii
Scientific Name	Dimorphodon macronyx	Dorygnathus banthensis	Eudimorphodon ranzii
Size	1 meter long; 1.45m wingspan	1 meter long; 1.5m wingspan	0.5 meters long; 1m wingspan
Diet	Generalist (Insects, small vertebrates)	Piscivore (Fish, soft cephalopods)	Piscivore / Insectivore (Fish, hard insects)
Habitat	Coastal cliffs and lowlands	Marine coastlines and shelf lagoons	Tropical coastal lagoons and marine margins
Where Found / Formation	United Kingdom; Blue Lias Formation	Germany; Posidonia Shale Formation	Italy; Zorzino Limestone Formation
Time	Early Jurassic (~195–190 Ma)	Early Jurassic (Toarcian, ~182 Ma)	Late Triassic (Norian, ~210 Ma)
Related Genera	Peteinosaurus, Caelestiventus	Campylognathoides, Rhamphinion	Caviramus, Arcticodactylus
Chart Table Data
🔹 Meaning	"Two-form tooth with large claws"	"Spear jaw from Banz"	"True two-form tooth honoring Ranzi"
🔹 Species	D. macronyx	D. banthensis	E. ranzii
🔹 Diet	Small lizards, large insects, mammals	Small agile fish, squid	Fish, crustaceans, hard-shelled prey
🔹 Epoch / Stage / Years	Early Jurassic (Sinemurian)	Early Jurassic (Toarcian)	Late Triassic (Norian)
🔹 Origin (Franchise)	Jurassic World, Ark: Survival Evolved	Dinosaur Revolution, Fossil League	Sea Monsters (BBC), Prehistoric Kingdom
🔹 Estimated L & H	L: 1m, H: 0.4m (standing)	L: 1m, H: 0.35m	L: 0.5m, H: 0.2m
🔹 Weight	2 – 3 kg	2 kg	1 kg
🔹 Collected	Complete skeleton (Mary Anning)	Skulls, isolated jaw arches, skeletons	Complete articulated skeletons with tissue
🔹 Status / Author / Year	Valid; Owen, 1859	Valid; Wagner, 1860	Valid; Zambelli, 1973
🔹 Area / Locality	Lyme Regis, Dorset, England	Holzmaden, Baden-Württemberg, Germany	Cene, Bergamo, Lombardy, Italy
🔹 Brian's Comments	The massive, puffin-like skull looks heavy but is a lattice of ultra-light bone structures.	Fierce, forward-jutting fangs formed an inescapable fish-basket when snapping closed.	One of the oldest known flying vertebrates, retaining highly complex multi-cusped teeth.

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Family Rhamphorhynchidae (Part 1)

Profile Field	Anurognathus ammoni	Rhamphorhynchus etchesi
Scientific Name	Anurognathus ammoni	Rhamphorhynchus etchesi
Size	9 cm long; 50 cm wingspan	50 cm long; 1.7m wingspan
Diet	Insectivore (Moths, beetles)	Piscivore (Small fish, squid)
Habitat	Subtropical forests and island lagoons	Coastal marine horizons and muddy bays
Where Found / Formation	Germany; Solnhofen Limestone	United Kingdom; Kimmeridge Clay Formation
Time	Late Jurassic (Tithonian, ~150 Ma)	Late Jurassic (Kimmeridgian, ~152 Ma)
Related Genera	Jeholopterus, Batrachognathus	Scaphognathus, Cacibupteryx
Chart Table Data
🔹 Meaning	"Tailless jaw honoring Ammon"	"Beak snout honoring Steve Etches"
🔹 Species	A. ammoni	R. etchesi
🔹 Diet	Nocturnal insects, aerial prey	Fish, marine invertebrates, soft cephalopods
🔹 Epoch / Stage / Years	Late Jurassic (Tithonian)	Late Jurassic (Kimmeridgian)
🔹 Origin (Franchise)	Walking with Dinosaurs, Primeval	Walking with Dinosaurs (Cruel Sea retro-identity)
🔹 Estimated L & H	L: 9cm, H: 5cm	L: 50cm, H: 20cm
🔹 Weight	40 grams	1 – 1.5 kg
🔹 Collected	Crushed but complete skeletons with impressions	Single exquisite, elongated wing specimen
🔹 Status / Author / Year	Valid; Döderlein, 1923	Valid; Martill et al., 2015
🔹 Area / Locality	Eichstätt, Bavaria, Germany	Kimmeridge, Dorset, England
🔹 Brian's Comments	Fledgling giant hunter that caught insects mid-air like a modern nightjar or bat.	Boasts unique, elongated distal wing mechanics setting it apart from German species.

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Family Rhamphorhynchidae (Part 2)

Profile Field	Scaphognathus crassirostris	Sordes pilosus
Scientific Name	Scaphognathus crassirostris	Sordes pilosus
Size	0.9 meters long; 1.2m wingspan	0.4 meters long; 0.6m wingspan
Diet	Carnivore / Generalist (Vertebrates, fish)	Insectivore / Small Vertebrates
Habitat	Coastal island environments	Inland lake ecosystems, temperate forests
Where Found / Formation	Germany; Solnhofen Limestone	Kazakhstan; Karabastau Formation
Time	Late Jurassic (Kimmeridgian, ~151 Ma)	Late Jurassic (Oxfordian/Kimmeridgian)
Related Genera	Rhamphorhynchus, Fenghuangopterus	Scaphognathus, Dendrorhynchoides
Chart Table Data
🔹 Meaning	"Tub snout with thick beak"	"Hairy devil"
🔹 Species	S. crassirostris	S. pilosus
🔹 Diet	Land lizards, small fish, invertebrates	Lake insects, small amphibians, worms
🔹 Epoch / Stage / Years	Late Jurassic (Kimmeridgian)	Late Jurassic (~155 Ma)
🔹 Origin (Franchise)	Dinosaur King, Pteros Educational Media	Prehistoric Planet, Dinosaurs! (Magazine)
🔹 Estimated L & H	L: 90cm, H: 30cm	L: 40cm, H: 15cm
🔹 Weight	900 grams	200 grams
🔹 Collected	Skulls, partial skeletons with soft tissue	Complete articulated specimens with clear fur
🔹 Status / Author / Year	Valid; Goldfuss, 1831	Valid; Sharov, 1971
🔹 Area / Locality	Eichstätt, Solnhofen, Bavaria, Germany	Karatau Range, Southern Kazakhstan
🔹 Brian's Comments	Shorter tail and robust skull show structural evolutionary traits towards Pterodactyloidea.	The landmark fossil that conclusively proved pterosaurs wore dense, insulating pycnofibers.

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Family Tapejaridae & Anhangueridae

Profile Field	Caiuajara dobruskii	Cearadactylus atrox
Scientific Name	Caiuajara dobruskii	Cearadactylus atrox
Size	0.7 meters long; 2.35m wingspan	1.2 meters long; 4 – 5.5m wingspan
Diet	Frugivore (Fruits, seeds)	Piscivore (Pelagic fish, river fish)
Habitat	Desert oases, inland dune lakes	Coastal estuaries, shallow epicontinental lagoons
Where Found / Formation	Brazil; Goio-Erê Formation	Brazil; Romualdo (Santana) Formation
Time	Late Cretaceous (Coniacian, ~85 Ma)	Early Cretaceous (Albian, ~112 Ma)
Related Genera	Tapejara, Tupandactylus	Anhanguera, Maaradactylus
Chart Table Data
🔹 Meaning	"Caiuá spirit honoring Dobruski"	"Ceará finger, ferocious"
🔹 Species	C. dobruskii	C. atrox
🔹 Diet	Subtropical forest seeds, ancient fruits	Coastal fish, cephalopods, shoreline meat
🔹 Epoch / Stage / Years	Late Cretaceous (Coniacian)	Early Cretaceous (Albian)
🔹 Origin (Franchise)	Prehistoric Kingdom, Paleoart Circles	Jurassic Park (Novelization), JWE2
🔹 Estimated L & H	L: 70cm, H: 0.9m (crest peak)	L: 1.2m, H: 0.7m
🔹 Weight	3 – 4 kg	15 kg
🔹 Collected	Bonebed of 47+ individuals (all ages)	Single damaged skull with partial jaw elements
🔹 Status / Author / Year	Valid; Manzig et al., 2014	Valid; Leonardi & Borgomanero, 1985
🔹 Area / Locality	Cruzeiro do Oeste, Paraná, Brazil	Araripe Plateau, Ceará, Northeast Brazil
🔹 Brian's Comments	Massive bonebeds show they lived in gregarious colonies around desert watering holes.	Features a famous interlocking "fish trap" row of expanded teeth at the very front of the snout.

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Family Ornithocheiridae (Part 1 - Giant Crested Fish-Eaters)

Profile Field	Geosternbergia sternbergi	Pteranodon longiceps
Scientific Name	Geosternbergia sternbergi	Pteranodon longiceps
Size	2 meters long; 6 – 7.2m wingspan	2 meters long; 5.6 – 6.2m wingspan
Diet	Piscivore (Pelagic fish, small sharks)	Piscivore (Surface fish, ocean invertebrates)
Habitat	Open pelagic oceans, offshore winds	Western Interior Seaway (Pelagic open ocean)
Where Found / Formation	USA; Niobrara Chalk Formation	USA; Niobrara Chalk, Pierre Shale
Time	Late Cretaceous (Coniacian–Santonian)	Late Cretaceous (Campanian, ~85–80 Ma)
Related Genera	Pteranodon, Dawndraco	Geosternbergia, Tethydraco
Chart Table Data
🔹 Meaning	"George Sternberg's earth element"	"Toothless wing with a long head"
🔹 Species	G. sternbergi	P. longiceps
🔹 Diet	Pelagic marine fish, squids	Marine schooling fish, soft ocean targets
🔹 Epoch / Stage / Years	Late Cretaceous (~88–85 Ma)	Late Cretaceous (Campanian)
🔹 Origin (Franchise)	Jurassic World Evolution 2	Jurassic Park III, Chased by Sea Monsters
🔹 Estimated L & H	L: 2m, H: 1.4m	L: 2m, H: 1.2m
🔹 Weight	25 – 35 kg	20 – 30 kg
🔹 Collected	Dozens of skulls showing gender variation	Over 1,100 specimens collected
🔹 Status / Author / Year	Valid; Miller, 1972	Valid; Marsh, 1876
🔹 Area / Locality	Rooks County, Kansas, USA	Smoky Hill River, Kansas, USA
🔹 Brian's Comments	Males carried a gigantic, bulbous upright crest over twice the size of the skull itself.	The undisputed quintessential toothless pterosaur, built for long-distance dynamic ocean soaring.

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Family Ornithocheiridae (Part 2) & Family Pterodaustriidae

Profile Field	Quetzalcoatlus lawsoni	Pterodaustro guinazui
Scientific Name	Quetzalcoatlus lawsoni	Pterodaustro guinazui
Size	13.5 meters long; 4.5 – 25m wingspan	0.4 meters long; 1.2m wingspan
Diet	Generalist Carnivore / Scavenger	Filter Feeder (Micro-crustaceans, algae)
Habitat	Inland lakes, floodplains, lagoons	Shallow, hyper-saline wetlands and lakes
Where Found / Formation	USA; Javelina & Black Peaks Formations	Argentina; Lagarcito Formation
Time	Late Cretaceous (Maastrichtian, ~66 Ma)	Early Cretaceous (Albian, ~105 Ma)
Related Genera	Quetzalcoatlus northropi, Arambourgiania	Ctenochasma, Gnathosaurus
Chart Table Data
🔹 Meaning	"Quetzalcoatl serpent honoring Douglas Lawson"	"Southern wing honoring Guiñazú"
🔹 Species	Q. lawsoni	P. guinazui
🔹 Diet	Small land vertebrates, carrion, lake fauna	Plankton, microscopic aquatic organisms
🔹 Epoch / Stage / Years	Late Cretaceous (Late Maastrichtian)	Early Cretaceous (Albian)
🔹 Origin (Franchise)	Jurassic World Dominion (as small morphs), JWE2	Prehistoric Planet, Dino Dan
🔹 Estimated L & H	L: 13.5m, H: 12.2 meters (Stork-like stance)	L: 40cm, H: 25cm
🔹 Weight	45 – 65,000 kg	1.5 – 2 kg
🔹 Collected	Over 200 specimens (skulls, bones)	Hundreds of specimens from egg to adult
🔹 Status / Author / Year	Valid; Andres & Langston, 2021	Valid; Bonaparte, 1970
🔹 Area / Locality	Big Bend National Park, Texas, USA	San Luis Province, Patagonia, Argentina
🔹 Brian's Comments	Described in 2021, this small lake-dwelling giant tells us much about azhdarchid growth.	Possessed over 1,000 comb-like bristles in its lower jaw used to skim food like a flamingo.

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Family Podokesauridae & Ceratosauridae

Profile Field	Coelophysis bauri	Podokesaurus holyokensis	Procompsognathus triassicus	Ceratosaurus nasicornis
Scientific Name	Coelophysis bauri	Podokesaurus holyokensis	Procompsognathus triassicus	Ceratosaurus nasicornis
Size	3 meters (10 ft) long	1 meter (3.3 ft) long	1 meter (3.3 ft) long	6 – 7 meters (20–23 ft) long
Diet	Carnivore (Small vertebrates)	Carnivore / Insectivore	Carnivore (Insects, small lizards)	Hypercarnivore (Large herbivores)
Habitat	Semi-arid floodplains, scrublands	Lush rift valley lake environments	Subtropical inland floodplains	Forested floodplains, river basins
Where Found / Formation	New Mexico, USA; Chinle Formation	Massachusetts, USA; Portland Formation	Germany; Löwenstein Formation	Utah, CO, USA; Morrison Formation
Time	Late Triassic (Norian–Rhaetian)	Early Jurassic (Pliensbachian)	Late Triassic (Norian, ~210 Ma)	Late Jurassic (Kimmeridgian)
Related Genera	Megapnosaurus, Camposaurus	Coelophysis, Segisaurus	Coelophysis, Panguraptor	Genyodectes, Fosterovenator
Chart Table Data
🔹 Meaning	"Hollow form honoring Baur"	"Swift-footed lizard of Holyoke"	"Before the elegant jaw, Triassic"	"Horned lizard with a large nose"
🔹 Species	C. bauri	P. holyokensis	P. triassicus	C. nasicornis
🔹 Diet	Small reptiles, early mammals, fish	Insects, early cursorial lizards	Insects, ancestral crocodilians	Sauropods, ornithopods, lungfish
🔹 Epoch / Stage / Years	Late Triassic (~203 Ma)	Early Jurassic (~190–180 Ma)	Late Triassic (Norian)	Late Jurassic (~153–150 Ma)
🔹 Origin (Franchise)	Walking with Dinosaurs (BBC)	Massachusetts State Dinosaur Bill	Jurassic Park (Novel base genus)	Jurassic Park III, JWE2
🔹 Estimated L & H	L: 3m, H: 0.9m	L: 1m, H: 0.3m	L: 1m, H: 0.28m	L: 6.5m, H: 2.2m
🔹 Weight	15 – 25 kg	1 – 2 kg	1 kg	500 – 1,000 kg
🔹 Collected	Thousands of complete skeletons	Fragmentary skeleton (Lost in 1917 fire)	Holotype skull and partial postcrania	Exquisite skulls, near-complete skeletons
🔹 Status / Author / Year	Valid; Cope, 1889	Valid; Talbot, 1911	Valid; Fraas, 1913	Valid; Marsh, 1884
🔹 Area / Locality	Ghost Ranch, New Mexico, USA	Mount Holyoke, Massachusetts, USA	Pfaffenhofen, Baden-Württemberg	Garden Park, Colorado, USA
🔹 Brian's Comments	Mass mortality bonebeds tell us they traveled in highly coordinated, defensive packs.	Described by Mignon Talbot, the first woman to officially name a non-avian dinosaur.	Historically confused with early crocodile cousins, it is a truly elegant Triassic hunter.	Fitted with a prominent nasal horn and unique four-fingered hands that evoke a primitive archetype.

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Family Dilophosauridae & Abelisauridae

Profile Field	Dilophosaurus wetherilli	Carnotaurus sastrei	Majungasaurus crenatissimus
Scientific Name	Dilophosaurus wetherilli	Carnotaurus sastrei	Majungasaurus crenatissimus
Size	7 meters (23 ft) long	7.5 – 9 meters (25–30 ft) long	6 – 7 meters (20–23 ft) long
Diet	Hypercarnivore (Early herbivores, fish)	Hypercarnivore (Fast, small prey)	Hypercarnivore (Cannibalistic tendencies)
Habitat	Seasonal river valleys, flood basins	Arid coastal plains, low forests	Semi-arid coastal floodplains
Where Found / Formation	Arizona, USA; Kayenta Formation	Argentina; La Colonia Formation	Madagascar; Maevarano Formation
Time	Early Jurassic (Sinemurian–Pliensbachian)	Late Cretaceous (Campanian–Maastrichtian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Dracovenator, Notatesseraeraptor	Aucasaurus, Abelisaurus	Indosaurus, Rajasaurus
Chart Table Data
🔹 Meaning	"Two-crested lizard honoring Wetherill"	"Meat-eating bull honoring Anselmo Sastre"	"Mahajanga lizard, very crenulated"
🔹 Species	D. wetherilli	S. sastrei	M. crenatissimus
🔹 Diet	Medium ornithischians, sauropodomorphs	Cursorial ornithopods, small sauropods	Titanosaurs, smaller Majungasaurus
🔹 Epoch / Stage / Years	Early Jurassic (~186 Ma)	Late Cretaceous (~71–69 Ma)	Late Cretaceous (~66 Ma)
🔹 Origin (Franchise)	Jurassic Park (Iconic pop culture identity)	Dinosaur, Prehistoric Planet, JWE2	Jurassic World Evolution 2, Dino Riders
🔹 Estimated L & H	L: 7m, H: 2.0m	L: 8m, H: 2.5 meters	L: 6.5m, H: 1.8m
🔹 Weight	400 kg	1.35 – 2 metric tons	1.1 metric tons
🔹 Collected	Multiple articulated adult/juvenile skeletons	Single exceptionally complete skin-impression skeleton	Exceptional skulls, abundant isolated elements
🔹 Status / Author / Year	Valid; Welles, 1954	Valid; Bonaparte, 1985	Valid; Depéret, 1896
🔹 Area / Locality	Coconino County, Arizona, USA	Telsen Department, Chubut, Argentina	Mahajanga Province, Madagascar
🔹 Brian's Comments	Completely lacked venom or neck frills in real life; it was a large, dominant early Jurassic apex hunter.	Boasted highly advanced vestigial arms and long muscular legs designed for high-speed sprints.	The first dinosaur with indisputable bone-deep evidence of practicing systemic cannibalism.

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Family Megalosauridae

Profile Field	Eustreptospondylus oxoniensis	Marshosaurus bicentesimus	Poekilopleuron bucklandii	Torvosaurus gurneyi
Scientific Name	Eustreptospondylus oxoniensis	Marshosaurus bicentesimus	Poekilopleuron bucklandii	Torvosaurus gurneyi
Size	4.6 meters (15 ft) long	5 – 6 meters (16–20 ft) long	7 meters (23 ft) long	10 meters (33 ft) long
Diet	Carnivore / Scavenger	Carnivore (Medium game)	Hypercarnivore	Apex Predator
Habitat	Island coastlines, tidal lagoons	Open floodplains, river basins	Coastal swamps, shallow seas	Forested river valleys, plains
Where Found / Formation	England; Oxford Clay Formation	Utah, CO, USA; Morrison Formation	France; Calcaire de Caen	Portugal; Lourinhã Formation
Time	Middle Jurassic (Callovian, ~163 Ma)	Late Jurassic (Kimmeridgian–Tithonian)	Middle Jurassic (Bathonian, ~167 Ma)	Late Jurassic (Tithonian, ~150 Ma)
Related Genera	Megalosaurus, Magnosaurus	Sciurimimus, Piatnitzkysaurus	Megalosaurus, Duriavenator	Torvosaurus tanneri, Megalosaurus
Chart Table Data
🔹 Meaning	"Well-curved vertebra from Oxford"	"Othniel Marsh's lizard, bicentennial"	"Varied ribs honoring William Buckland"	"Savage lizard honoring James Gurney"
🔹 Species	E. oxoniensis	M. bicentesimus	P. bucklandii	T. gurneyi
🔹 Diet	Marine reptiles, shoreline carrion, fish	Small sauropods, dryosaurs	Mid-sized sauropodomorphs, fish	Stegosaurs, large iguanodontians
🔹 Epoch / Stage / Years	Middle Jurassic (Callovian)	Late Jurassic (~155–150 Ma)	Middle Jurassic (Bathonian)	Late Jurassic (Tithonian)
🔹 Origin (Franchise)	Walking with Dinosaurs (BBC)	Dinosaur King (Card/Arcade game)	Early 19th-century European monographs	Dinosaur Revolution, Paleoart
🔹 Estimated L & H	L: 4.6m, H: 1.4m	L: 5.4m, H: 1.6m	L: 7m, H: 2.1m	L: 10m, H: 3.1 meters
🔹 Weight	250 kg (Subadult holotype)	200 – 300 kg	1 metric ton	4 – 5 metric tons
🔹 Collected	Single near-perfect juvenile skeleton	Incomplete skull elements, pelvic girdle	Articulated skeleton (Destroyed in WWII)	Giant maxilla, isolated teeth, large limbs
🔹 Status / Author / Year	Valid; Walker, 1964	Valid; Madsen, 1976	Valid; Eudes-Deslongchamps, 1838	Valid; Hendrickx & Mateus, 2014
🔹 Area / Locality	Wolvercote, Oxfordshire, England	Cleveland-Lloyd Quarry, Utah, USA	Calvados, Normandy, France	Lisbon District, Portugal
🔹 Brian's Comments	The subadult fossil shows highly developed sensory zones adapted for beachcombing life.	A smaller, highly agile carnosaur that lived in the shadow of massive Allosaurus populations.	Tragically lost during the Allied bombings of Caen in 1924; only plaster casts survive.	The largest land predator ever discovered in Europe, wielding blade-like teeth over 10cm long.

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Family Carcharodontosauridae & Allosauridae

Profile Field	Acrocanthosaurus atokensis	Giganotosaurus carolinii	Allosaurus europaeus	Yangchuanosaurus zigongensis
Scientific Name	Acrocanthosaurus atokensis	Giganotosaurus carolinii	Allosaurus europaeus	Yangchuanosaurus zigongensis
Size	11.5 meters (38 ft) long	12 – 13 meters (40–43 ft) long	13.5 meters (44 ft) long	8 meters (26 ft) long
Diet	Hypercarnivore (Sauropod hunter)	Apex Predator (Giant sauropods)	Hypercarnivore	Apex Predator
Habitat	Coastal swamps, deltaic floodplains	Semi-arid open inland river plains	Open savanna-like coastal forests	Dense sub-tropical river plains
Where Found / Formation	OK, TX, USA; Antlers Formation	Argentina; Candeleros Formation	Portugal; Lourinhã Formation / New Mexico, USA; Morrison Formation	Sichuan, China; Shaximiao Formation
Time	Early Cretaceous (Aptian–Albian)	Late Cretaceous (Cenomanian, ~98 Ma)	Late Jurassic (Kimmeridgian)	Middle Jurassic (Bathonian–Callovian)
Related Genera	Carcharodontosaurus, Tyrannotitan	Mapusaurus, Carcharodontosaurus	Allosaurus fragilis, A. jimmadseni	Metriacanthosaurus, Sinraptor
Chart Table Data
🔹 Meaning	"High-spined lizard from Atoka"	"Giant southern lizard honoring Carolini"	"Different lizard from Europe"	"Yangchuan lizard from Zigong"
🔹 Species	A. atokensis	G. carolinii	A. europaeus	Y. zigongensis
🔹 Diet	Sauroposeidon, Tenontosaurus	Andesaurus, giant saltasaurids	Camptosaurs, juvenile sauropods	Shunosaurus, Huayangosaurus
🔹 Epoch / Stage / Years	Early Cretaceous (~115–110 Ma)	Late Cretaceous (~98–97 Ma)	Late Jurassic (~150 Ma)	Middle Jurassic (~165 Ma)
🔹 Origin (Franchise)	Primal Carnage, JWE2	Jurassic World Dominion, Ark	Disputed Taxon (Often cited in papers)	Dinosaur King, Paleoart Circles
🔹 Estimated L & H	L: 11.5m, H: 3.9m (Ridge tip)	L: 12.5m, H: 3.8 meters	L: 13.5m, H: 4.1m	L: 8m, H: 2.6m
🔹 Weight	5.7 – 6.2 metric tons	7 – 8.5 metric tons	6 metric tons	2.3 metric tons
🔹 Collected	Complete skeletons, trackway prints	70% complete holotype skeleton	Partial skull, associated elements	Multiple near-perfect articulated skulls
🔹 Status / Author / Year	Valid; Stovall & Langston, 1950	Valid; Coria & Salgado, 1995	Disputed (Synonym of A. fragilis)	Valid; Gao, 1993
🔹 Area / Locality	Atoka County, Oklahoma, USA	Neuquén Province, Patagonia	Porto Novo, Lourinhã, Portugal / Sandoval County, New Mexico, USA	Dashanpu Quarry, Zigong, China
🔹 Brian's Comments	The high neural spines formed a powerful muscle ridge capable of wrestling down giant sauropods.	Possessed a skull longer than a human, but with a highly restricted, narrow braincase.	Taxonomy is highly contested; recent 2025 papers interpret these remains as European variants of A. fragilis.	Wore a distinctive set of rugose bony nose crests used for visual dominance displays.

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Family Spinosauridae

Profile Field	Baryonyx walkeri	Spinosaurus aegyptiacus	Suchomimus tenerensis
Scientific Name	Baryonyx walkeri	Spinosaurus aegyptiacus	Suchomimus tenerensis
Size	7.5 – 9 meters (25–30 ft) long	14 meters (46 ft) long	9.5 – 11 meters (31–36 ft) long
Diet	Piscivore / Facultative Carnivore	Specialized Piscivore / Semi-aquatic	Piscivore / Generalist Carnivore
Habitat	Subtropical delta swamps, lagoons	Mangrove river systems, tidal channels	Expansive inland river deltas, floodplains
Where Found / Formation	England; Weald Clay Formation	Egypt, Morocco; Kem Kem Group	Niger; Elrhaz Formation
Time	Early Cretaceous (Barremian, ~125 Ma)	Late Cretaceous (Cenomanian, ~95 Ma)	Early Cretaceous (Aptian, ~112 Ma)
Related Genera	Suchomimus, Ceratosuchops	Sigilmassasaurus, Ichthyovenator	Baryonyx, Riparovenator
Chart Table Data
🔹 Meaning	"Heavy claw honoring William Walker"	"Spine lizard from Egypt"	"Crocodile mimic from Ténéré desert"
🔹 Species	B. walkeri	S. aegyptiacus	S. tenerensis
🔹 Diet	Lepidotes (fish), juvenile Iguanodon	Giant sawfish (Onchopristis), lungfish	Large teleost fish, turtles, small crocs
🔹 Epoch / Stage / Years	Early Cretaceous (Barremian)	Late Cretaceous (Cenomanian)	Early Cretaceous (Aptian)
🔹 Origin (Franchise)	Jurassic Park III (Mention), JWE2	Jurassic Park III (Apex antagonist)	Jurassic Park Builder, Ark: Survival Evolved
🔹 Estimated L & H	L: 8.5m, H: 2.2m	L: 14m, H: 4.2 meters (Sail peak)	L: 10m, H: 2.8m
🔹 Weight	1.7 – 2 metric tons	6.5 – 7.5 metric tons	3 – 3.8 metric tons
🔹 Collected	Holotype skull with iconic 31cm thumb claw	Holotype destroyed in WWII; neotype skeletons	Near-complete skeleton lacking skull tail tip
🔹 Status / Author / Year	Valid; Charig & Milner, 1986	Valid; Stromer, 1915	Valid; Sereno et al., 1998
🔹 Area / Locality	Surrey, England	Bahariya Oasis, Egypt; Tafilalt, Morocco	Gadoufaoua, Ténéré Desert, Niger
🔹 Brian's Comments	Fossilized stomach contents revealed acid-etched fish scales along with bones of young iguanodontids.	The tail was recently revealed to be broad and paddle-like, shifting its profile to an active swimmer.	The skull shape is exceptionally narrow and gharial-like, optimized for lateral water strikes.

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Family Tyrannosauridae (Part 1 - The Northern Tyrants)

Profile Field	Albertosaurus sarcophagus	Gorgosaurus libratus	Tarbosaurus bataar	Tyrannosaurus rex
Scientific Name	Albertosaurus sarcophagus	Gorgosaurus libratus	Tarbosaurus bataar	Tyrannosaurus rex
Size	8 – 9 meters (26–30 ft) long	8 – 9 meters (26–30 ft) long	10 – 11.5 meters (33–38 ft) long	12 – 15 meters (40–49 ft) long
Diet	Hypercarnivore (Pack hunter)	Hypercarnivore (Agile hunter)	Apex Predator (Sauropod hunter)	Hypercarnivore (Crushing bite force)
Habitat	Cool temperate coastal redwoods	Subtropical floodplains, wet forests	Semi-arid open river channels, basins	Coastal plains, forested river basins
Where Found / Formation	Alberta, Canada; Horseshoe Canyon	Alberta, Canada; Dinosaur Park	Mongolia; Nemegt Formation	USA, Canada; Hell Creek Formation
Time	Late Cretaceous (Early Maastrichtian)	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Gorgosaurus, Albertosaurus	Albertosaurus, Daspletosaurus	Tyrannosaurus, Zhuchengtyrannus	Tarbosaurus, Daspletosaurus
Chart Table Data
🔹 Meaning	"Alberta lizard flesh-eater"	"Fierce lizard, balanced"	"Alarming lizard, hero"	"Tyrant lizard king"
🔹 Species	A. sarcophagus	G. libratus	T. bataar	T. rex
🔹 Diet	Hypacrosaurus, Saurolophus	Centrosaurus, Lambeosaurus	Nemegtosaurus, Saurolophus	Triceratops, Edmontosaurus
🔹 Epoch / Stage / Years	Late Cretaceous (~71–68 Ma)	Late Cretaceous (~76–75 Ma)	Late Cretaceous (~70–66 Ma)	Late Cretaceous (~68–66 Ma)
🔹 Origin (Franchise)	Prehistoric Park, JWE2	Prehistoric Planet, Walking with Dinosaurs	Dinotasia, Chased by Sea Monsters	The ultimate face of the Jurassic Park franchise
🔹 Estimated L & H	L: 8.6m, H: 2.7m	L: 8.5m, H: 2.6m	L: 11m, H: 3.3m	L: 15.3m, H: 6 meters
🔹 Weight	2 – 2.5 metric tons	2 – 2.4 metric tons	4 – 5 metric tons	8 – 10 metric tons
🔹 Collected	Dry Island bonebed of 26+ individuals	Dozens of exquisite complete skeletons	Massive numbers of articulated skulls/skeletons	~50 partial to exceptionally complete skeletons
🔹 Status / Author / Year	Valid; Osborn, 1905	Valid; Lambe, 1914	Valid; Maleev, 1955	Valid; Osborn, 1905
🔹 Area / Locality	Red Deer River, Alberta, Canada	Dinosaur Provincial Park, Alberta	Desert floor, Gobi Desert, Mongolia	Montana, Wyoming, South Dakota, USA
🔹 Brian's Comments	The Dry Island bonebed provides direct evidence of a highly organized, social age structure.	Lighter and faster than Daspletosaurus, it shared its biome by exploiting swift prey niches.	The Asian cousin of T. rex; possessed unique locking jaw joints to resist thrashing sauropods.	Possessed the highest bone-crushing bite force of any terrestrial animal ever estimated.

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Family Tyrannosauridae (Part 2 - Long-Snouted Tyrants)

Profile Field	Qianzhousaurus sinensis
Scientific Name	Qianzhousaurus sinensis
Size	8.5 meters (28 ft) long
Diet	Hypercarnivore (Agile pursuit predator)
Habitat	Subtropical dense river forests
Where Found / Formation	Ganzhou, China; Nanxiong Formation
Time	Late Cretaceous (Late Maastrichtian, ~66 Ma)
Related Genera	Alioramus, Tyrannosaurus
Chart Table Data
🔹 Meaning	"Qianzhou lizard from China"
🔹 Species	Q. sinensis
🔹 Diet	Oviraotorids, smaller hadrosauroids
🔹 Epoch / Stage / Years	Late Cretaceous (~67–66 Ma)
🔹 Origin (Franchise)	Prehistoric Planet, Jurassic World Evolution 2
🔹 Estimated L & H	L: 8.5m, H: 2.2m
🔹 Weight	750 – 800 kg
🔹 Collected	Near-perfect articulated skull and skeleton
🔹 Status / Author / Year	Valid; Lü et al., 2014
🔹 Area / Locality	Ganzhou City, Jiangxi Province, China
🔹 Brian's Comments	Affectionately nicknamed "Pinocchio rex" due to its remarkably long, narrow skull profile.

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Family Coeluridae & Tyrannosauroidea (Basal Forms)

Profile Field	Coelurus fragilis	Ornitholestes hermanni	Moros intrepidus	Nanotyrannus lethaeus
Scientific Name	Coelurus fragilis	Ornitholestes hermanni	Moros intrepidus	Nanotyrannus lethaeus
Size	2.4 meters (8 ft) long	2 meters (6.5 ft) long	1.2 meters (4 ft) long	5 meters (16 ft) long
Diet	Carnivore / Insectivore	Carnivore (Small vertebrates)	Insectivore / Carnivore	Hypercarnivore
Habitat	Forested semi-arid flood basins	Dense floodplain forests	Open forested coastal plains	Open coastal floodplains
Where Found / Formation	Wyoming, USA; Morrison Formation	Wyoming, USA; Morrison Formation	Utah, USA; Cedar Mountain Formation	Montana, USA; Hell Creek Formation
Time	Late Jurassic (Kimmeridgian)	Late Jurassic (Kimmeridgian)	Late Cretaceous (Cenomanian, ~96 Ma)	Late Cretaceous (Late Maastrichtian)
Related Genera	Tanycolagreus, Ornitholestes	Coelurus, Zuolong	Dilong, Xiongguanlong	Tyrannosaurus rex (Juvenile morph)
Chart Table Data
🔹 Meaning	"Hollow tail, fragile"	"Bird robber honoring Adam Hermann"	"Impending doom, intrepid"	"Dwarf tyrant, hidden"
🔹 Species	C. fragilis	O. hermanni	M. intrepidus	N. lethaeus
🔹 Diet	Early lizards, mammals, large insects	Small cursorial lizards, early birds	Insects, early lizards, hatchlings	Mid-sized ornithopods, pachycephalosaurs
🔹 Epoch / Stage / Years	Late Jurassic (~153–150 Ma)	Late Jurassic (~153–150 Ma)	Late Cretaceous (Cenomanian)	Late Cretaceous (~67–66 Ma)
🔹 Origin (Franchise)	Early 20th-century paleontology texts	Walking with Dinosaurs (BBC)	Jurassic World Dominion, JWE2	Prehistoric Planet (as juvenile T. rex)
🔹 Estimated L & H	L: 2.4m, H: 0.7m	L: 2m, H: 0.6m	L: 1.2m, H: 0.4m	L: 5.2m, H: 1.7m
🔹 Weight	15 – 20 kg	12 – 15 kg	78 kg	400 – 600 kg
🔹 Collected	Fragmentary vertebral column elements	Articulated skeleton missing tail tip	Single diagnostic hindlimb element set	Complete articulated skulls, "Duelling Dinos"
🔹 Status / Author / Year	Valid; Marsh, 1879	Valid; Osborn, 1903	Valid; Zanno et al., 2019	Disputed (Synonym of T. rex juvenile)
🔹 Area / Locality	Como Bluff, Albany County, Wyoming	Bone Cabin Quarry, Wyoming, USA	Emery County, Utah, USA	Carter County, Montana, USA
🔹 Brian's Comments	The internal bone walls were remarkably thin, a trait that directly echoes bird lineages.	Classic paleoart erroneously gave it a nose horn due to a crushed nasal bone.	The smallest North American tyrannosauroid; bridged a critical 70-million-year ghost lineage gap.	Decades-long debate leans heavily toward this being a juvenile stage growth phase of T. rex.

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Family Compsognathidae & Proceratosauridae

Profile Field	Compsognathus longipes	Proceratosaurus bradleyi	Yutyrannus huali
Scientific Name	Compsognathus longipes	Proceratosaurus bradleyi	Yutyrannus huali
Size	1.25 meters (4 ft) long	3 meters (10 ft) long	9 meters (30 ft) long
Diet	Carnivore (Small vertebrates)	Carnivore (Small game, insects)	Hypercarnivore (Apex pack hunter)
Habitat	Subtropical dry island lagoons	Forested coastal lowlands	Cool, seasonal temperate forests
Where Found / Formation	Germany, France; Solnhofen	England; Forest Marble Formation	Liaoning, China; Yixian Formation
Time	Late Jurassic (Tithonian, ~150 Ma)	Middle Jurassic (Bathonian, ~166 Ma)	Early Cretaceous (Aptian, ~125 Ma)
Related Genera	Sinosauropteryx, Juravenator	Guanlong, Sinotyrannus	Dilong, Proceratosaurus
Chart Table Data
🔹 Meaning	"Elegant jaw with long feet"	"Before horned lizard honoring Bradley"	"Beautiful feathered tyrant"
🔹 Species	C. longipes	P. bradleyi	Y. huali
🔹 Diet	Bavarisaurus (lizards), large beetles	Early small mammals, lizards	Sauropods (Psittacosaurus), theropods
🔹 Epoch / Stage / Years	Late Jurassic (Tithonian)	Middle Jurassic (Bathonian)	Early Cretaceous (~125 Ma)
🔹 Origin (Franchise)	The Lost World: Jurassic Park ("Compy")	Jurassic Park Builder, JWE2	Ark: Survival Evolved, Prehistoric Planet
🔹 Estimated L & H	L: 1.25m, H: 0.35m	L: 3m, H: 0.9m	L: 9m, H: 2.7 meters
🔹 Weight	2.5 – 3.5 kg	30 – 40 kg	1.4 metric tons
🔹 Collected	Exquisite complete skeletons with gut contents	Single partial fossil skull arch	Three complete articulated skeletons together
🔹 Status / Author / Year	Valid; Wagner, 1859	Valid; von Huene, 1926	Valid; Xu et al., 2012
🔹 Area / Locality	Jachenhausen, Bavaria, Germany	Minchinhampton, Gloucestershire, England	Jianchang County, Liaoning Province, China
🔹 Brian's Comments	For a century, it was famous for being the smallest known non-avian dinosaur specimen.	Originally thought to be ancestral to Ceratosaurus due to its small nasal crest.	The largest land animal known to science with direct fossil preservation of a full shaggy coat.

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Family Ornithomimidae & Deinocheiridae (Ostrich Dinosaurs)

Profile Field	Archaeornithomimus asiaticus	Gallimimus bullatus	Ornithomimus velox	Struthiomimus altus	Deinocheirus mirificus
Scientific Name	Archaeornithomimus asiaticus	Gallimimus bullatus	Ornithomimus velox	Struthiomimus altus	Deinocheirus mirificus
Size	3.4 meters long	6 – 8 meters long	3.8 meters long	4.3 meters long	15 meters (49 ft) long
Diet	Omnivore / Herbivore	Omnivore / Filter Feeder	Omnivore (Plants, insects)	Omnivore (Leaves, seeds)	Specialized Omnivore
Habitat	Semi-arid floodplains	Wet inland river basins	Open coastal woodlands	Floodplains, river bays	Inland deltaic swamps
Where Found / Formation	Inner Mongolia; Iren Dabasu	Mongolia; Nemegt Formation	Colorado, USA; Denver Formation	Alberta, Canada; Dinosaur Park	Mongolia; Nemegt Formation
Time	Late Cretaceous (Turonian)	Late Cretaceous (Maastrichtian)	Late Cretaceous (Maastrichtian)	Late Cretaceous (Campanian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Sinornithomimus	Anserimimus, Struthiomimus	Dromiceiomimus, Struthiomimus	Gallimimus, Ornithomimus	Garudimimus, Beishanlong
Chart Table Data
🔹 Meaning	"Ancient bird mimic from Asia"	"Rooster mimic with capsule bones"	"Swift bird mimic"	"Ostrich mimic, tall"	"Terrible hand, unusual"
🔹 Species	A. asiaticus	G. bullatus	O. velox	S. altus	D. mirificus
🔹 Diet	Twigs, seeds, insects, lizards	Water plants, small fish, seeds	Fruits, insects, small mammals	Ferns, seeds, small invertebrates	Fish, water vegetation, pond weeds
🔹 Epoch / Stage / Years	Late Cretaceous (~90 Ma)	Late Cretaceous (~70 Ma)	Late Cretaceous (~66 Ma)	Late Cretaceous (~76 Ma)	Late Cretaceous (~70–66 Ma)
🔹 Origin (Franchise)	Jurassic World Evolution	Jurassic Park (Iconic flocking scene)	Prehistoric Park, Paleoart	Jurassic Park: Operation Genesis	Prehistoric Planet, JWE2
🔹 Estimated L & H	L: 3.4m, H: 1.3m	L: 6.5m, H: 2.4m	L: 3.8m, H: 1.4m	L: 4.3m, H: 1.5m	L: 15m, H: 6.5 meters
🔹 Weight	50 – 90 kg	450 kg	150 kg	150 kg	6.4 metric tons
🔹 Collected	Multiple partial skeletons	Exceptional skull growth series	Disorganized foot and hand elements	Abundant, well-preserved skeletons	Massive 2.4-meter arms, complete skulls
🔹 Status / Author / Year	Valid; Russell, 1972	Valid; Osmólska et al., 1972	Valid; Marsh, 1890	Valid; Lambe, 1902	Valid; Osmólska, 1970
🔹 Area / Locality	Erenhot, Gobi Desert, China	Gobi Desert, Mongolia	Jefferson County, Colorado, USA	Red Deer River, Alberta, Canada	White Beds, Nemegt Basin, Mongolia
🔹 Brian's Comments	One of the earliest true ornithomimids; shows key steps in teeth loss trends.	Equipped with fine ridges in its beak, suggesting it strain-fed in bog pools.	The original type species for the entire family, though based on fragmentary limbs.	Possessed exceptionally long, slender hands that acted like hooks to pull down branches.	A bizarre giant sporting a deep camel-like sail back, duck beak, and immense claws.

Note: Dromiceiomimus samueli is grouped directly under Ornithomimus variations based on current consensus.

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Family Oviraptoridae, Saurornithoididae, & Therizinosauridae

Profile Field	Chirostenotes pergracilis	Oviraptor philoceratops	Troodon formosus	Therizinosaurus cheloniformis
Scientific Name	Chirostenotes pergracilis	Oviraptor philoceratops	Troodon formosus	Therizinosaurus cheloniformis
Size	2.5 meters (8 ft) long	1.6 meters (5 ft) long	2.5 meters (8 ft) long	10 meters (33 ft) long
Diet	Omnivore (Small prey, eggs, fruit)	Omnivore (Hard seeds, mollusks)	Omnivore / Carnivore	Herbivore (High-reach browser)
Habitat	Floodplain wetlands, swamp lines	Arid desert oases, sand dunes	Cool coastal forests, floodplain margins	Lush open river valleys
Where Found / Formation	Alberta, Canada; Dinosaur Park	Mongolia; Djadochta Formation	Montana, USA; Judith River Formation	Mongolia; Nemegt Formation
Time	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Campanian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Elmisaurus, Anzu	Citipati, Conchoraptor	Saurornithoides, Zanabazar	Segnosaurus, Erlikosaurus
Chart Table Data
🔹 Meaning	"Narrow hand, very slender"	"Egg thief loving ceratopsians"	"Wounding tooth, finely shaped"	"Scythe lizard shaped like a turtle"
🔹 Species	C. pergracilis	O. philoceratops	T. formosus	T. cheloniformis
🔹 Diet	Small mammals, lizards, vegetation	Tough vegetation, ancient nuts, eggs	Small mammals, birds, soft plants	Tree leaves, high canopy branches
🔹 Epoch / Stage / Years	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~75 Ma)	Late Cretaceous (~77 Ma)	Late Cretaceous (~70 Ma)
🔹 Origin (Franchise)	Dinosaur Revolution, Paleoart	Dinosaur King, Jurassic Park games	Jurassic Park: The Game, Ark	Jurassic World Dominion, JWE2
🔹 Estimated L & H	L: 2.5m, H: 1.0m	L: 1.6m, H: 0.7m	L: 2.4m, H: 0.9m	L: 10m, H: 4.8 meters
🔹 Weight	60 kg	35 – 40 kg	50 kg	5 metric tons
🔹 Collected	Associated highly elegant hand bones	Holotype skull crushed directly over a nest	Isolated diagnostic serrated teeth	Immense 1-meter skeletal arm claws
🔹 Status / Author / Year	Valid; Gilmore, 1924	Valid; Osborn, 1924	Nomen dubium (Taxon reassigned)	Valid; Maleev, 1954
🔹 Area / Locality	Red Deer River, Alberta, Canada	Ukhaa Tolgod, Gobi Desert, Mongolia	Fergus County, Montana, USA	Nemegt Basin, Gobi Desert, Mongolia
🔹 Brian's Comments	Possessed highly elongated middle fingers used to probe tree bark holes for grubs.	Famously misnamed; later finds showed it died defending its own nest, not stealing eggs.	Long used to build "Dinosauroid" theories; its teeth are now viewed as non-diagnostic.	Wielded massive scythe claws used for stripping branches or terrifying predators.

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Family Dromaeosauridae (Part 1)

Profile Field	Atrociraptor marshalli	Deinonychus antirrhopus	Hesperonychus elizabethae	Pyroraptor olympius
Scientific Name	Atrociraptor marshalli	Deinonychus antirrhopus	Hesperonychus elizabethae	Pyroraptor olympius
Size	2 meters (6.5 ft) long	3.4 meters (11 ft) long	1 meter (3.3 ft) long	2.5 meters (8 ft) long
Diet	Hypercarnivore	Hypercarnivore (Large game hunter)	Carnivore / Insectivore	Hypercarnivore
Habitat	Semi-arid open floodplains	Subtropical floodplains, river deltas	Coastal forest marsh undergrowths	Island chain coastlines, scrub forests
Where Found / Formation	Alberta, Canada; Horseshoe Canyon	Montana, WY, USA; Cloverly Formation	Alberta, Canada; Dinosaur Park	France; Argiles Rutilantes
Time	Late Cretaceous (Maastrichtian, ~68 Ma)	Early Cretaceous (Aptian–Albian)	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Campanian–Maastrichtian)
Related Genera	Saurornitholestes, Bambiraptor	Saurornitholestes, Velociraptor	Microraptor, Sinornithosaurus	Variraptor, Acheroraptor
Chart Table Data
🔹 Meaning	"Savage robber honoring Wayne Marshall"	"Terrible claw counter-balanced"	"Western claw honoring Elizabeth Nicholls"	"Fire robber of Mount Olympe"
🔹 Species	A. marshalli	D. antirrhopus	H. elizabethae	P. olympius
🔹 Diet	Small reptiles, small dinosaurs	Tenontosaurus, early ceratopsians	Insects, primitive mammals, nestlings	Island dwarf sauropods, iguanodonts
🔹 Epoch / Stage / Years	Late Cretaceous (~68.5 Ma)	Early Cretaceous (~115–108 Ma)	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~70.6 Ma)
🔹 Origin (Franchise)	Jurassic World Dominion	The true inspiration for Jurassic Park raptors	Small raptor paleontology papers	Discovery Channel's Dinosaur Planet, JWE2
🔹 Estimated L & H	L: 2m, H: 0.65m	L: 3.4m, H: 1.0m	L: 1m, H: 0.3m	L: 2.5m, H: 0.75m
🔹 Weight	15 kg	73 – 100 kg	1.5 – 2 kg	30 kg
🔹 Collected	Robust jaw bones with specialized teeth	Multiple skeletons alongside herbivore bones	Exceptionally small fused pelvic girdle	Diagnostic foot claws, teeth, limb bones
🔹 Status / Author / Year	Valid; Currie & Varricchio, 2004	Valid; Ostrom, 1969	Valid; Longrich & Currie, 2009	Valid; Allain & Taquet, 2000
🔹 Area / Locality	Drumheller, Alberta, Canada	Carbon County, Montana, USA	Red Deer River, Alberta, Canada	La Boucharde, Provence, France
🔹 Brian's Comments	The jaws were significantly deeper and shorter than other raptors, built for a biting crunch.	The discovery that single-handedly sparked the "Dinosaur Renaissance" by proving dynamic activity.	The smallest carnivorous non-avian dinosaur discovered in North America; a true native microraptorine.	Discovered after a devastating forest fire; wore fully developed flight-ready arm plumage.

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Family Dromaeosauridae (Part 2), Archaeopterygidae, & Alexornithidae

Profile Field	Saurornitholestes sullivani	Utahraptor ostrommaysi	Velociraptor osmolskae	Archaeopteryx albersdoerferi	Alexornis antecedens
Scientific Name	Saurornitholestes sullivani	Utahraptor ostrommaysi	Velociraptor osmolskae	Archaeopteryx albersdoerferi	Alexornis antecedens
Size	1.8 meters long	5 – 6 meters long	2 meters long	0.5 meters long	15 cm long; sparrow-size
Diet	Hypercarnivore	Apex Pack Hunter	Hypercarnivore	Insectivore / Carnivore	Insectivore
Habitat	Coastal coastal shores	Open arid floodplains	Arid dunes, scrub desert	Subtropical island lagoons	Coastal scrublands, forests
Where Found / Formation	New Mexico; Kirtland Formation	Utah, USA; Cedar Mountain	Inner Mongolia; Bayan Mandahu	Germany; Solnhofen	Mexico; La Bocana Roja
Time	Late Cretaceous (Campanian)	Early Cretaceous (Barremian)	Late Cretaceous (Campanian)	Late Jurassic (Tithonian)	Late Cretaceous (Campanian)
Related Genera	S. langstoni, Atrociraptor	Achillobator, Dakotaraptor	V. mongoliensis, Adasaurus	Anchiornis, Xiaotingia	Gobipteryx, early enantiornithines
Chart Table Data
🔹 Meaning	"Lizard-bird thief, Sullivan's"	"Utah robber honoring Ostrom & Mays"	"Swift robber honoring Osmólska"	"Ancient wing honoring Albersdörfer"	"Alex's ancestral bird"
🔹 Species	S. sullivani	U. ostrommaysi	V. osmolskae	A. albersdoerferi	A. antecedens
🔹 Diet	Mammals, lizards, nestlings	Large iguanodontians, sauropods	Protoceratops, small lizards	Jurassic beetles, flying insects	Forest insects, soft grubs
🔹 Epoch / Stage / Years	Late Cretaceous (~73 Ma)	Early Cretaceous (~125 Ma)	Late Cretaceous (~75 Ma)	Late Jurassic (~150 Ma)	Late Cretaceous (~73 mya)
🔹 Origin (Franchise)	Paleoart community features	Walking with Dinosaurs (Movie), Ark	Jurassic Park (Taxonomy sibling)	Prehistoric Planet, Dino Dan	Walking with Dinosaurs (Movie)
🔹 Estimated L & H	L: 1.8m, H: 0.6m	L: 5.5m, H: 1.8 meters	L: 2m, H: 0.5m	L: 0.5m, H: 0.2m	L: 0.15m, H: 0.06m
🔹 Weight	10 kg	300 – 500 kg	15 – 20 kg	500 grams	35 grams
🔹 Collected	Diagnostic frontal skull roof bones	Massive multi-individual quicksand block	Distinctive upper jaw bone features	Complete skeleton ("11th specimen")	Fragmentary shoulder and wing bones
🔹 Status / Author / Year	Valid; Jasinski, 2015	Valid; Kirkland et al., 1993	Valid; Godefroit et al., 2008	Valid; Kundrát et al., 2018	Valid; Brodkorb, 1976
🔹 Area / Locality	San Juan Basin, New Mexico	Grand County, Utah, USA	Wulanshai, Inner Mongolia, China	Jachenhausen, Bavaria, Germany	El Rosario, Baja California, Mexico
🔹 Brian's Comments	Possessed exceptionally deep olfactory pathways, granting an incredibly keen sense of smell.	A heavily muscled giant built like a grizzly bear, completely reinterpreting standard agile raptor shapes.	Differentiated from V. mongoliensis by unique features in the maxilla and skull roof arches.	Described in 2018 using advanced synchrotron scanning to prove it was a distinct flying morph.	A key primitive land bird showing that true flight adaptations were fully formed in Cretaceous woods.

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Family Herrerasauridae & Anchisauridae

Note: The joke entry "Smurfette smurfiness" has been excluded from this scientific catalog.

Profile Field	Herrerasaurus ischigualastensis	Anchisaurus polyzelus	Efraasia minor	Thecodontosaurus antiquus
Scientific Name	Herrerasaurus ischigualastensis	Anchisaurus polyzelus	Efraasia minor	Thecodontosaurus antiquus
Size	3 – 6 meters (10–20 ft) long	2 meters (6.5 ft) long	6 meters (20 ft) long	1.2 meters (4 ft) long
Diet	Carnivore (Small to mid-sized prey)	Herbivore / Omnivore	Herbivore / Omnivore	Herbivore / Omnivore
Habitat	Seasonally arid river floodplains	Lush rift valley flood basins	Subtropical open floodplains	Island archipelagos, coastal woodlands
Where Found / Formation	Argentina; Ischigualasto Formation	Massachusetts, USA; Portland Formation	Germany; Löwenstein Formation	United Kingdom; Magnesian Conglomerate
Time	Late Triassic (Carnian, ~231 Ma)	Early Jurassic (Pliensbachian–Toarcian)	Late Triassic (Norian, ~210 Ma)	Late Triassic (Rhaetian, ~205 Ma)
Related Genera	Sanjuansaurus, Staurikosaurus	Ammosaurus, Massospondylus	Plateosaurus, Ruehleia	Pantydraco, Asylosaurus
Chart Table Data
🔹 Meaning	"Herrera's lizard from Ischigualasto"	"Near lizard, much-sought-for"	"Efraim Fraas's minor lizard"	"Socket-toothed ancient lizard"
🔹 Species	H. ischigualastensis	A. polyzelus	E. minor	T. antiquus
🔹 Diet	Rhynchosaurs, early synapsids, herds	Soft ferns, ancient cycads, insects	Seed ferns, conifers, small lizards	Low-growing shrubs, tender flora
🔹 Epoch / Stage / Years	Late Triassic (Carnian)	Early Jurassic (~185 Ma)	Late Triassic (Norian)	Late Triassic (Rhaetian)
🔹 Origin (Franchise)	Jurassic Park (Game), JWE2	Classic North American geology texts	Dinosaurs! Magazine (Retro mentions)	BBC's The Ballad of Big Al (Mention)
🔹 Estimated L & H	L: 4.5m, H: 1.4m	L: 2m, H: 0.6m	L: 6m, H: 1.5m	L: 1.2m, H: 0.35m
🔹 Weight	200 – 350 kg	25 – 30 kg	250 kg	11 kg
🔹 Collected	Complete skeletons, pristine skulls	Segmented bones, partial postcrania	Fragmentary skeletons, juvenile skulls	Disarticulated bones in fissure fills
🔹 Status / Author / Year	Valid; Reig, 1963	Valid; Hitchcock, 1865	Valid; Galton, 1973	Valid; Morris, 1843
🔹 Area / Locality	San Juan Province, Argentina	Springfield, Massachusetts, USA	Pfaffenhofen, Baden-Württemberg	Durdham Down, Bristol, England
🔹 Brian's Comments	One of the earliest true dinosaurs; possessed a flexible lower jaw joint for gripping struggling prey.	Originally mistaken for human bones when unearthed by construction workers in 1818.	Historically confused with both Sellosaurus and Teratosaurus due to tangled Triassic classifications.	The fourth dinosaur genus ever named in history, living on isolated prehistoric British islands.

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Family Plateosauridae & Melanorosauridae

Profile Field	Massospondylus kaalae	Plateosaurus gracilis	Riojasaurus incertus
Scientific Name	Massospondylus kaalae	Plateosaurus gracilis	Riojasaurus incertus
Size	4 – 6 meters (13–20 ft) long	4.5 – 5 meters (15–16 ft) long	10 meters (33 ft) long
Diet	Herbivore (High-reach browser)	Herbivore (Selective browser)	Herbivore (Bulky low-to-mid browser)
Habitat	Semi-arid environments, seasonal rivers	Arid to semi-arid flood basins	Broad inland river valleys, plains
Where Found / Formation	South Africa; Upper Elliot Formation	Germany; Löwenstein Formation	Argentina; Los Colorados Formation
Time	Early Jurassic (Hettangian–Pliensbachian)	Late Triassic (Norian, ~210 Ma)	Late Triassic (Norian, ~215 Ma)
Related Genera	Lufengosaurus, Coloradisaurus	P. trossingensis, Unaysaurus	Melanorosaurus, Camelotia
Chart Table Data
🔹 Meaning	"Massive vertebra honoring Kaala"	"Broad lizard, slender built"	"La Rioja lizard, uncertain"
🔹 Species	M. kaalae	P. gracilis	R. incertus
🔹 Diet	Conifer needles, seed ferns	Cycads, primitive club mosses	Early tropical canopy flora, ferns
🔹 Epoch / Stage / Years	Early Jurassic (~195 Ma)	Late Triassic (Norian)	Late Triassic (Late Norian)
🔹 Origin (Franchise)	When Dinosaurs Roamed America	Dinosaur King, Early German museums	Walking with Dinosaurs (Textbooks/Guides)
🔹 Estimated L & H	L: 4.5m, H: 1.5m	L: 4.8m, H: 1.4m	L: 10m, H: 2.6 meters
🔹 Weight	1,000 kg	600 kg	2.5 – 3 metric tons
🔹 Collected	Complete nesting sites with eggs/embryos	Dozens of bonebeds, complete skeletons	Multiple articulated headless/complete skeletons
🔹 Status / Author / Year	Valid; Barrett, 2009	Valid; von Huene, 1905	Valid; Bonaparte, 1969
🔹 Area / Locality	Free State, South Africa	Trossingen, Baden-Württemberg, Germany	Pagancillo, La Rioja Province, Argentina
🔹 Brian's Comments	Nesting sites show parents carefully arranged round eggs and likely fed toothless hatchlings.	Originally described as Sellosaurus gracilis before modern revisions unified the group under Plateosaurus.	Unlike smaller prosauropods, this massive beast was an obligate, heavy-set quadruped.

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Family Cetiosauridae & Brachiosauridae

Profile Field	Barapasaurus tagorei	Brachiosaurus altithorax	Sauroposeidon proteles
Scientific Name	Barapasaurus tagorei	Brachiosaurus altithorax	Sauroposeidon proteles
Size	12 – 14 meters (40–46 ft) long	22 – 26 meters (72–85 ft) long	28 – 34 meters (92–111 ft) long
Diet	Herbivore	Herbivore (High-canopy specialist)	Herbivore (Ultra-high canopy browser)
Habitat	Lush, tropical river basins	Forested floodplains, open savannas	Costal plains, river deltas, lowlands
Where Found / Formation	India; Kota Formation	Colorado, USA; Morrison Formation / India; Kota Formation	Oklahoma, Texas, USA; Antlers Formation
Time	Early to Middle Jurassic (~175 Ma)	Late Jurassic (Kimmeridgian–Tithonian)	Early Cretaceous (Aptian–Albian)
Related Genera	Cetiosaurus, Shunosaurus	Giraffatitan, Lusotitan	Brachiosaurus, Abydosaurus
Chart Table Data
🔹 Meaning	"Big-legged lizard honoring Tagore"	"Arm lizard with a deep chest"	"Lizard earthquake god, advanced"
🔹 Species	B. tagorei	B. altithorax	S. proteles
🔹 Diet	Ancient ginkgos, conifers, tree ferns	High conifer branches, cycad leaves	High-altitude tree tops, conifers, palms
🔹 Epoch / Stage / Years	Early–Middle Jurassic (Toarcian)	Late Jurassic (~152 Ma)	Early Cretaceous (~112–105 Ma)
🔹 Origin (Franchise)	Early sauropod evolution monographs	The signature awe-inspiring icon of Jurassic Park	Monsters Resurrected, JWE2
🔹 Estimated L & H	L: 14m, H: 3.5m	L: 26m, H: 12 – 15 meters	L: 32m, H: 16 – 17 meters
🔹 Weight	7 metric tons	35 – 50 metric tons	40 – 60 metric tons
🔹 Collected	Bonebeds containing ~300 isolated bones	Highly limited partial skeletons, giant limbs	Exceedingly long cervical (neck) vertebrae
🔹 Status / Author / Year	Valid; Jain et al., 1975	Valid; Riggs, 1903	Valid; Wedel et al., 2000
🔹 Area / Locality	Adilabad District, Telangana, India	Grand Junction, Colorado, USA / Adilabad District, Telangana, India	Atoka County, Oklahoma, USA
🔹 Brian's Comments	The oldest known structurally sound giant sauropod; lacked the hollow vertebrae of later lines.	The posture was distinctly giraffe-like, with hindlimbs shorter than its immense forelimbs.	The tallest dinosaur ever recorded; single neck vertebrae were over 1.4 meters long and honeycombed with air pits.

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Family Camarasauridae

Profile Field	Camarasaurus supremus	Euhelopus zdanskyi	Opisthocoelicaudia skarzynskii
Scientific Name	Camarasaurus supremus	Euhelopus zdanskyi	Opisthocoelicaudia skarzynskii
Size	15 – 23 meters (50–75 ft) long	11 – 15 meters (36–50 ft) long	11.4 meters (37 ft) long
Diet	Herbivore (Generalist crushing browser)	Herbivore	Herbivore (Low-to-mid browser)
Habitat	Semi-arid open floodplains, basins	Forested lake systems, sub-tropical valleys	Lush deltaic swamp forests, river plains
Where Found / Formation	CO, WY, UT, USA; Morrison Formation	Shandong, China; Mengyin Formation	Mongolia; Nemegt Formation
Time	Late Jurassic (Kimmeridgian–Tithonian)	Early Cretaceous (Barremian–Aptian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Cathetosaurus, Lourinhasaurus	Erketu, Huabeisaurus	Saltasaurus, Alamosaurus
Chart Table Data
🔹 Meaning	"Chambered lizard of highest rank"	"True marsh foot honoring Otto Zdansky"	"Posterior-hollow tail honoring Skarżyńska"
🔹 Species	C. supremus	E. zdanskyi	O. skarzynskii
🔹 Diet	Tough pine needles, branches, cycads	Sub-tropical canopy brush, ferns	Tough river reeds, shrubs, aquatic flora
🔹 Epoch / Stage / Years	Late Jurassic (~150 Ma)	Early Cretaceous (~120 Ma)	Late Cretaceous (~70–66 Ma)
🔹 Origin (Franchise)	Jurassic Park: Operation Genesis, JWE2	Early East Asian paleontology surveys	Dino Dan, Mesozoic ecosystem dioramas
🔹 Estimated L & H	L: 18m, H: 8.5m	L: 13m, H: 3.8m	L: 11.4m, H: 2.8m
🔹 Weight	20 – 30 metric tons	4 – 5 metric tons	8.5 – 10 metric tons
🔹 Collected	Hundreds of complete adult/juvenile skeletons	Two near-complete skeletons, pristine skulls	Perfectly articulated skeleton lacking a neck/head
🔹 Status / Author / Year	Valid; Cope, 1877	Valid; Romer, 1956	Valid; Borsuk-Białynicka, 1977
🔹 Area / Locality	Garden Park, Colorado, USA	Mengyin County, Shandong, China	Altan Ula, Gobi Desert, Mongolia
🔹 Brian's Comments	The most common sauropod of the Morrison Formation, using robust, spoon-shaped teeth to grind coarse food.	Possessed highly specialized long legs relative to its arms, breaking from standard sauropod curves.	The unique ball-and-socket tail joints indicate it could prop itself up into a stable tripod stance.

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Family Diplodocidae (The Whip-Tails)

Profile Field	Apatosaurus ajax	Diplodocus hallorum	Mamenchisaurus sinocanadorum	Supersaurus vivianae
Scientific Name	Apatosaurus ajax	Diplodocus hallorum	Mamenchisaurus sinocanadorum	Supersaurus vivianae
Size	21 – 23 meters (70–75 ft) long	30 – 33 meters (98–108 ft) long	35 meters (115 ft) long	39 – 50 meters (128–160 ft) long
Diet	Herbivore (Low ground sweeping browser)	Herbivore (Ground-level stripper)	Herbivore ( Sweeping mid-canopy browser)	Herbivore (Massive volume general browser)
Habitat	Semi-arid open wood savannas	Forested river valleys, open floodplains	Sub-tropical dense river floodplains	Extensive semi-arid inland plains
Where Found / Formation	CO, UT, WY, USA; Morrison Formation	New Mexico, USA; Morrison Formation	Xinjiang, China; Shishugou Formation	Colorado, WY, USA; Morrison Formation
Time	Late Jurassic (Kimmeridgian–Tithonian)	Late Jurassic (Tithonian, ~150 Ma)	Late Jurassic (Oxfordian, ~160 Ma)	Late Jurassic (Kimmeridgian–Tithonian)
Related Genera	Brontosaurus, Barosaurus	Barosaurus, Galeamopus	Omeisaurus, Chuanjiesaurus	Barosaurus, Diplodocus
Chart Table Data
🔹 Meaning	"Deceptive lizard, Ajax hero"	"Double-beam honoring Jim Hall"	"Mamenchi wing, Sino-Canadian project"	"Super lizard honoring Vivian Jones"
🔹 Species	A. ajax	D. hallorum	M. sinocanadorum	V. vivianae
🔹 Diet	Horsetails, low ferns, water weeds	Low-lying ground foliage, ferns, mosses	Mid-to-high tree needles, ginkgos	Massive volumes of soft conifers, ferns
🔹 Epoch / Stage / Years	Late Jurassic (~152–151 Ma)	Late Jurassic (~150 Ma)	Late Jurassic (~160 Ma)	Late Jurassic (~150 Ma)
🔹 Origin (Franchise)	Jurassic Park (Novel/Film hybrid identity)	Walking with Dinosaurs (as Seismosaurus)	Dinosaur Revolution, Giant Sauropod texts	Paleoart, Large-scale museum exhibits
🔹 Estimated L & H	L: 22m, H: 6.8m	L: 32m, H: 6.5m (At hips)	L: 35m, H: 17.5m	L: 50m, H: 21.1 meters (At head)
🔹 Weight	20 – 25 metric tons	23 – 30 metric tons	60 – 75 metric tons	35 – 40 metric tons
🔹 Collected	Multiple massive articulated skeletons	Holotype partial skeleton (tail and pelvis)	Massive fused neck bones, partial skeleton	Articulated shoulder girdles, immense ribs
🔹 Status / Author / Year	Valid; Marsh, 1877	Valid; Lucas, 1988	Valid; Russell & Zheng, 1993	Valid; Jensen, 1985
🔹 Area / Locality	Gunnison County, Colorado, USA	Sandoval County, New Mexico, USA	Junggar Basin, Xinjiang, China	Dry Mesa Quarry, Colorado, USA
🔹 Brian's Comments	Famed for its stocky, immensely muscled neck and limbs compared to its longer, slimmer cousins.	Long known under the name Seismosaurus before recent skull-matching unmasked it as a giant Diplodocus.	Possessed a record-setting 15-meter neck, supported by lightweight bone cross-struts.	Recent 2020s structural analysis validates it as the longest valid dinosaur found in North America.

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Family Titanosauridae (The True Giants)

Profile Field	Dreadnoughtus schrani	Patagotitan mayorum	Saltasaurus loricatus
Scientific Name	Dreadnoughtus schrani	Patagotitan mayorum	Saltasaurus loricatus
Size	26 meters (85 ft) long	37 meters (122 ft) long	8.5 meters (28 ft) long
Diet	Herbivore (Massive scale bulk browser)	Herbivore (Massive scale bulk browser)	Herbivore (Low ground browser)
Habitat	Temperate humid river valley forests	Semi-arid open floodplains, forests	Arid coastal plains, scrub lowlands
Where Found / Formation	Argentina; Cerro Fortaleza Formation	Argentina; Cerro Barcino Formation	Argentina; Lecho Formation
Time	Late Cretaceous (Campanian–Maastrichtian)	Let Cretaceous (Albian, ~101 Ma)	Late Cretaceous (Late Maastrichtian)
Related Genera	Notocolossus, Futalognkosaurus	Argentinosaurus, Puertasaurus	Neuquensaurus, Rocasaurus
Chart Table Data
🔹 Meaning	"Fears-nothing honoring Adam Schran"	"Patagonian titan, Mayo family farm"	"Salta Province lizard with body armor"
🔹 Species	D. schrani	P. mayorum	S. loricatus
🔹 Diet	High conifers, massive volume green foliage	Entire sub-tropical tree crowns, leaves	Coarse shrubs, ground-level plants
🔹 Epoch / Stage / Years	Late Cretaceous (~76–70 Ma)	Late Cretaceous (~101.5 Ma)	Late Cretaceous (~68–66 Ma)
🔹 Origin (Franchise)	Prehistoric Planet, Jurassic World Dominion	David Attenborough and the Giant Dinosaur	Dinosaur King, Early armored dinosaur papers
🔹 Estimated L & H	L: 26m, H: 18 meters	L: 37m, H: 12 meters	L: 8.5m, H: 2.1m
🔹 Weight	48 – 54 metric tons	65 – 70 metric tons	2.5 metric tons
🔹 Collected	70% complete skeleton (most intact giant)	Multi-individual bonebed (6+ specimens)	Hundreds of armor osteoderms, skeletons
🔹 Status / Author / Year	Valid; Lacovara et al., 2014	Valid; Carballido et al., 2017	Valid; Bonaparte & Powell, 1980
🔹 Area / Locality	Santa Cruz Province, Patagonia	Chubut Province, Patagonia, Argentina	Salta Province, Northwest Argentina
🔹 Brian's Comments	Its name honors the classic steel battleships because an adult would have been virtually immune to attack.	One of the absolute largest land animals ever discovered, rivaling Argentinosaurus in mass.	The landmark find that proved some sauropods grew crocodile-like bony armor plating across their backs.

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🦕 Family Fabrosauridae & Heterodontosauridae (Primitive Ornithischians)

Profile Field	Lesothosaurus diagnosticus	Scutellosaurus lawleri	Echinodon becklesii	Heterodontosaurus tucki
Scientific Name	Lesothosaurus diagnosticus	Scutellosaurus lawleri	Echinodon becklesii	Heterodontosaurus tucki
Size	1 meter (3.3 ft) long	1.2 meters (4 ft) long	0.6 meters (2 ft) long	1.2 meters (4 ft) long
Diet	Herbivore / Omnivore	Herbivore	Herbivore / Omnivore	Omnivore / Herbivore
Habitat	Semi-arid floodplains, dunes	Arid deserts, oasis margins	Coastal lagoons, swamp margins	Seasonal river valleys, flood basins
Where Found / Formation	Lesotho, South Africa; Elliot Formation	Arizona, USA; Kayenta Formation	England; Purbeck Group	South Africa; Elliot Formation
Time	Early Jurassic (Hettangian–Sinemurian)	Early Jurassic (Sinemurian–Pliensbachian)	Early Cretaceous (Berriasian, ~140 Ma)	Early Jurassic (Hettangian–Sinemurian)
Related Genera	Fabrosaurus, Stormbergia	Eocursor, Lesothosaurus	Fruitadens, Tianyulong	Lycorhinus, Abrictosaurus
Chart Table Data
🔹 Meaning	"Lizard from Lesotho, diagnostic"	"Little shielded lizard honoring Lawler"	"Prickly tooth honoring Samuel Beckles"	"Different-toothed lizard honoring Tuck"
🔹 Species	L. diagnosticus	S. lawleri	E. becklesii	H. tucki
🔹 Diet	Low shrubs, roots, small insects	Ferns, early desert brush	Roots, tough leaves, insects	Roots, tubers, small lizards, insects
🔹 Epoch / Stage / Years	Early Jurassic (~198–195 Ma)	Early Jurassic (~186 Ma)	Early Cretaceous (~140 Ma)	Early Jurassic (~199–196 Ma)
🔹 Origin (Franchise)	Dinosaur King, Early textbook graphics	When Dinosaurs Roamed America	Early British Mesozoic monographs	Prehistoric Kingdom, Paleoart
🔹 Estimated L & H	L: 1m, H: 0.3m	L: 1.2m, H: 0.25m	L: 0.6m, H: 0.15m	L: 1.2m, H: 0.4m
🔹 Weight	1.8 – 2.5 kg	3 kg	500 grams	2 – 3.4 kg
🔹 Collected	Complete articulated skulls & skeletons	Articulated partial skeletons, osteoderms	Fragmentary jaw fragments with teeth	Exquisite three-dimensional skulls
🔹 Status / Author / Year	Valid; Galton, 1978	Valid; Colbert, 1981	Valid; Owen, 1861	Valid; Crompton & Charig, 1962
🔹 Area / Locality	Mafeteng District, Lesotho	Coconino County, Arizona, USA	Isle of Purbeck, Dorset, England	Cape Province, South Africa
🔹 Brian's Comments	A classic, ultra-primitive bird-hipped baseline form built for extreme high-speed agility.	One of the earliest armored dinosaurs, acting as a structural link leading toward stegosaurs.	One of the few known heterodontosaurids to survive late into the early Cretaceous era.	Armed with iconic prominent canine-like tusks likely used for intra-species display or defense.

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Part 1

Profile Field	Dryosaurus elderae	Hypsilophodon foxii	Parksosaurus warreni
Scientific Name	Dryosaurus elderae	Hypsilophodon foxii	Parksosaurus warreni
Size	2.5 – 3 meters (8–10 ft) long	1.8 meters (6 ft) long	2.5 meters (8 ft) long
Diet	Herbivore	Herbivore	Herbivore
Habitat	Semi-arid open floodplains, forests	Coastal sub-tropical floodplains	Cool temperate redwood forests
Where Found / Formation	Utah, Colorado, USA; Morrison Formation	Isle of Wight, UK; Wessex Formation	Alberta, Canada; Horseshoe Canyon
Time	Late Jurassic (Kimmeridgian–Tithonian)	Early Cretaceous (Barremian, ~125 Ma)	Late Cretaceous (Maastrichtian, ~70 Ma)
Related Genera	Dysalotosaurus, Valdosaurus	Orodromeus, Zephyrosaurus	Thescelosaurus, Orodromeus
Chart Table Data
🔹 Meaning	"Oak lizard honoring Ann Elder"	"High-crested tooth honoring Fox"	"William Parks's lizard honoring Warren"
🔹 Species	D. elderae	H. foxii	P. warreni
🔹 Diet	Ferns, horsetails, low club mosses	Low-lying forest ground vegetation	Ferns, shrubs, conifer seed cones
🔹 Epoch / Stage / Years	Late Jurassic (~150 Ma)	Early Cretaceous (Barremian)	Late Cretaceous (~70–68 Ma)
🔹 Origin (Franchise)	Jurassic Park: Operation Genesis, JWE2	Walking with Dinosaurs (BBC)	Western Canadian paleontology catalogs
🔹 Estimated L & H	L: 2.8m, H: 0.9m	L: 1.8m, H: 0.5m	L: 2.5m, H: 0.8m
🔹 Weight	70 – 90 kg	20 kg	65 kg
🔹 Collected	Complete growth series, pristine skulls	Massive multi-individual bonebeds	Single partial skeleton lacking a tail tip
🔹 Status / Author / Year	Valid; Carpenter & Galton, 2018	Valid; Huxley, 1869	Valid; Sternberg, 1937
🔹 Area / Locality	Dinosaur National Monument, Utah, USA	Brighstone Bay, Isle of Wight, UK	Red Deer River, Alberta, Canada
🔹 Brian's Comments	Split from D. altus in 2018; had a noticeably more elongated skull and distinct pelvic lines.	Victorian-era scientists incorrectly thought it climbed trees like a modern tree-kangaroo.	One of the final specialized small-bodied bipeds sharing territory with giant duckbills.

Part 2

Profile Field	Tenontosaurus dossi	Thescelosaurus garbanii	Valdosaurus canaliculatus
Scientific Name	Tenontosaurus dossi	Thescelosaurus garbanii	Valdosaurus canaliculatus
Size	6 – 7 meters (20–23 ft) long	2.5 – 4 meters (8–13 ft) long	4 meters (13 ft) long
Diet	Herbivore	Herbivore (Ground picker)	Herbivore
Habitat	Sub-tropical marsh deltas, lowlands	Stream-cut coastal plains, woodlands	Braided river environments, lagoons
Where Found / Formation	Texas, USA; Twin Mountains Formation	Montana, USA; Hell Creek Formation	England, UK; Weald Clay Formation
Time	Early Cretaceous (Aptian, ~115 Ma)	Late Cretaceous (Late Maastrichtian)	Early Cretaceous (Barremian, ~125 Ma)
Related Genera	T. tilletti, Muttaburrasaurus	Parksosaurus, Orodromeus	Dryosaurus, Elrhazosaurus
Chart Table Data
🔹 Meaning	"Sinew lizard honoring James Doss"	"Wonderful lizard honoring Garbani"	"Wealden lizard with little channels"
🔹 Species	T. dossi	T. garbanii	V. canaliculatus
🔹 Diet	Tough cycad leaves, low-lying ferns	Roots, low tough woody brush	Horsetails, ferns, Cretaceous shrubs
🔹 Epoch / Stage / Years	Early Cretaceous (Aptian)	Late Cretaceous (~67–66 Ma)	Early Cretaceous (Barremian)
🔹 Origin (Franchise)	Primal Carnage, Jurassic Park card games	Prehistoric Planet, Paleoart circles	Isle of Wight museum displays
🔹 Estimated L & H	L: 6.5m, H: 1.8m	L: 3.5m, H: 1.1m	L: 4m, H: 1.2m
🔹 Weight	600 – 1,000 kg	200 – 300 kg	150 kg
🔹 Collected	Articulated adult and juvenile skeletons	Partially articulated headless postcrania	Fragmentary femur sets, associated limbs
🔹 Status / Author / Year	Valid; Winkler et al., 1997	Valid; Morris, 1976	Valid; Galton, 1975
🔹 Area / Locality	Parker County, Texas, USA	Garfield County, Montana, USA	Cuckfield, West Sussex, England
🔹 Brian's Comments	The ancestral species to T. tilletti; possessed primitive teeth at the front of its snout.	Built remarkably stocky and low to the earth compared to its classic agile relatives.	A highly migratory dryosaurid that crossed early European river delta systems.

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🦖 Family Iguanodontidae (Large Beaked Browsers)

Profile Field	Camptosaurus dispar	Hippodraco scutodens	Iguanodon bernissartensis	Muttaburrasaurus langdoni	Ouranosaurus nigeriensis
Scientific Name	Camptosaurus dispar	Hippodraco scutodens	Iguanodon bernissartensis	Muttaburrasaurus langdoni	Ouranosaurus nigeriensis
Size	5 – 6 meters long	4.5 meters long	9 – 13 meters long	7 – 8 meters long	7 – 8.3 meters long
Diet	Herbivore	Herbivore	Herbivore	Herbivore / Omnivore	Herbivore
Habitat	Forested semi-arid plains	Expansive open floodbasins	Sub-tropical delta swamps	Open coastal river valleys	Inland river system deltas
Where Found / Formation	UT, WY, CO; Morrison	Utah, USA; Cedar Mountain	Belgium, Germany; Sainte-Barbe	Queensland; Mackunda	Niger; Elrhaz Formation
Time	Late Jurassic (Kimmeridgian)	Early Cretaceous (Barremian)	Early Cretaceous (~125–120 Ma)	Early Cretaceous (Albian, ~103 Ma)	Early Cretaceous (Aptian, ~112 Ma)
Related Genera	Cumnoria, Uteodon	Iguanodon, Theiophytalia	Mantellisaurus, Ouranosaurus	Tenontosaurus, Fostoria	Iguanodon, Mantellisaurus
Chart Table Data
🔹 Meaning	"Flexible lizard, distinct"	"Horse dragon with shield teeth"	"Iguana tooth from Bernissart"	"Muttaburra lizard, Langdon's"	"Brave lizard from Niger"
🔹 Species	C. dispar	H. scutodens	I. bernissartensis	M. langdoni	O. nigeriensis
🔹 Diet	Cycads, ferns, conifers	Low ferns, early shrubs	Conifers, horsetails, club mosses	Tough vegetation, scavenged meat	High-sugar river flora, leaves
🔹 Epoch / Stage / Years	Late Jurassic (~152 Ma)	Early Cretaceous (Barremian)	Early Cretaceous (Aptian)	Early Cretaceous (Albian)	Early Cretaceous (Aptian)
🔹 Origin (Franchise)	Jurassic Park: Explorer, JWE2	American iguanodontian studies	Walking with Dinosaurs (BBC)	Walking with Dinosaurs (BBC)	Land Before Time, JWE2
🔹 Estimated L & H	L: 6m, H: 1.8m	L: 4.5m, H: 1.4m	L: 13m, H: 4.7 meters	L: 7.5m, H: 2.2m	L: 8m, H: 2.5 meters
🔹 Weight	500 – 800 kg	400 kg	3.5 – 4.5 metric tons	2.8 metric tons	2.2 metric tons
🔹 Collected	Abundant articulated skeletons	Single complete skull and skeleton	30+ complete intact coal mine skeletons	Exquisite complete skeleton, skull	Two complete skeletons with sails
🔹 Status / Author / Year	Valid; Marsh, 1879	Valid; Kirkland et al., 2010	Valid; Boulenger, 1881	Valid; Bartholomai, 1981	Valid; Taquet, 1976
🔹 Area / Locality	Como Bluff, Wyoming, USA	Grand County, Utah, USA	Bernissart, Hainaut, Belgium	Muttaburra, Queensland	Gadoufaoua, Ténéré Desert
🔹 Brian's Comments	Possessed highly versatile hands capable of transitioning between bipedal running and quadrupedal walking.	The skull shape shows a highly specialized downward-sloping horse-like profile.	The iconic discovery in a Belgian coal mine proved dinosaurs lived in large communal groups.	Features a massive hollow nose chamber likely used as a powerful acoustic speaker box.	Possessed highly elongated neural spines that formed a prominent sail used for heat regulation.

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Part 1 - Solid & Hollow Crested Morphs

Profile Field	Corythosaurus casuarius	Edmontosaurus regalis	Hypacrosaurus stebingeri	Lambeosaurus magnicristatus
Scientific Name	Corythosaurus casuarius	Edmontosaurus regalis	Hypacrosaurus stebingeri	Lambeosaurus magnicristatus
Size	9 meters (30 ft) long	12 – 13 meters (40–43 ft) long	9 meters (30 ft) long	9.1 meters (30 ft) long
Diet	Herbivore (Grinding battery)	Herbivore (Massive bulk shredder)	Herbivore	Herbivore
Habitat	Coastal swamps, swamp channels	Forested coastal river valleys	Floodplains, semi-arid woods	Sub-tropical wet river plains
Where Found / Formation	Alberta, Canada; Dinosaur Park / Lance	Alberta, Canada; Horseshoe Canyon / Lance	Montana, USA; Two Medicine	Alberta, Canada; Dinosaur Park
Time	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Maastrichtian, ~72 Ma)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Campanian, ~75 Ma)
Related Genera	Hypacrosaurus, Lambeosaurus	Shantungosaurus, Anatosuchus	Corythosaurus, Lambeosaurus	Corythosaurus, Amurosaurus
Chart Table Data
🔹 Meaning	"Helmet lizard like a cassowary"	"Edmonton lizard king"	"Near the highest lizard, Stebinger's"	"Lawrence Lambe's large-crested lizard"
🔹 Species	C. casuarius	E. regalis	H. stebingeri	L. magnicristatus
🔹 Diet	Pine needles, twigs, ancient fruits	Conifer needles, bark, broad leaves	High-fiber ferns, tree leaves	Tough land plants, shrubs, twigs
🔹 Epoch / Stage / Years	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~72–71 Ma)	Late Cretaceous (~75 Ma)	Late Cretaceous (~75.5 Ma)
🔹 Origin (Franchise)	Jurassic Park III, JWE2	Jurassic World (Website background)	Walking with Dinosaurs (Movie)	Jurassic Park: Operation Genesis
🔹 Estimated L & H	L: 9m, H: 2.8m	L: 12m, H: 3.5 meters	L: 9m, H: 3.0m	L: 9.1m, H: 3.1m
🔹 Weight	3.8 – 4 metric tons	4 – 5.6 metric tons	4 metric tons	4 metric tons
🔹 Collected	Complete skeletons with soft skin wraps	Mummified specimens with hoof pads	Extensive nesting grounds with embryos	Pristine skulls showing giant crest lines
🔹 Status / Author / Year	Valid; Brown, 1914	Valid; Lambe, 1917	Valid; Horner, 1994	Valid; Sternberg, 1935
🔹 Area / Locality	Red Deer River, Alberta, Canada / Niobrara County, Wyoming, USA	Red Deer River, Alberta, Canada / Niobrara County, Wyoming, USA	Glacier County, Montana, USA	Red Deer River, Alberta, Canada
🔹 Brian's Comments	The large, rounded crest was hollow, wired straight into the nasal channels to hoot.	Recent mummies reveal a fleshy, rooster-like comb completely hidden from the skull bone.	Nesting sites preserve fossilized egg clusters alongside beautifully intact hatchling skeletons.	The spectacular crest forward-jutting design was likely highly vibrant in color.

Part 2 - High Speakers & True Giants

Profile Field	Maiasaura peeblesorum	Parasaurolophus walkeri	Saurolophus osborni	Shantungosaurus giganteus	Tsintaosaurus spinorhinus
Scientific Name	Maiasaura peeblesorum	Parasaurolophus walkeri	Saurolophus osborni	Shantungosaurus giganteus	Tsintaosaurus spinorhinus
Size	9 meters (30 ft) long	9.5 – 10 meters long	8.5 – 9.8 meters long	15 – 16.6 meters long	8.3 meters (27 ft) long
Diet	Herbivore	Herbivore (High speaker)	Herbivore	Herbivore (Colossal scale)	Herbivore
Habitat	Semi-arid upland floodplains	Sub-tropical forest channels	River delta plains, lakeshores	Coastal river plain valleys	Semi-arid open floodbasins
Where Found / Formation	Montana, USA; Two Medicine	Alberta, Canada; Dinosaur Park	Alberta, Canada; Horseshoe Canyon	Shandong, China; Wangshi Group	Shandong, China; Wangshi Group
Time	Late Cretaceous (Campanian)	Late Cretaceous (Campanian)	Late Cretaceous (Maastrichtian)	Late Cretaceous (Campanian)	Late Cretaceous (Campanian)
Related Genera	Brachylophosaurus	Charonosaurus, Blasisaurus	Prosaurolophus, Augustynolophus	Edmontosaurus, Kerberosaurus	Pararhabdodon, Jaxartosaurus
Chart Table Data
🔹 Meaning	"Good mother lizard, Peebles"	"Near crested lizard honoring Walker"	"Lizard crest honoring Henry Osborn"	"Shandong Province giant lizard"	"Qingdao lizard with a nose spine"
🔹 Species	M. peeblesorum	P. walkeri	S. osborni	S. giganteus	T. spinorhinus
🔹 Diet	Ferns, rotting wood, soft leaves	Conifer needles, twigs, leaves	Broad leaves, pine needles, shrubs	Massive bulk tree limbs, flora	Soft leaves, lakeside shrubs
🔹 Epoch / Stage / Years	Late Cretaceous (~76 Ma)	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~70–68 Ma)	Late Cretaceous (~73 Ma)	Late Cretaceous (~72 Ma)
🔹 Origin (Franchise)	Jurassic Park (Novel herd star)	Lost World: Jurassic Park, JWE2	Early American Museum displays	Primal Carnage, JWE2	Dinosaur King, Paleoart circles
🔹 Estimated L & H	L: 9m, H: 2.5m	L: 9.8m, H: 2.8 meters	L: 9.2m, H: 2.6m	L: 15.5m, H: 5.5 meters	L: 8.3m, H: 2.7m
🔹 Weight	3 – 4 metric tons	2.5 – 3.5 metric tons	3 metric tons	13 – 16 metric tons	3 metric tons
🔹 Collected	Complete "Egg Mountain" colony	Near-perfect skull, partial skeleton	Complete skeletons, soft skin paths	Massive multi-individual bonebeds	Skulls showing unique horn spines
🔹 Status / Author / Year	Valid; Horner & Makela, 1979	Valid; Parks, 1922	Valid; Brown, 1912	Valid; Hu, 1973	Valid; Young, 1958
🔹 Area / Locality	Choteau, Montana, USA	Red Deer River, Alberta, Canada	Red Deer River, Alberta, Canada	Zhucheng City, Shandong, China	Laiyang, Shandong Province, China
🔹 Brian's Comments	The breakthrough species that conclusively proved dinosaurs built nests and cared for helpless young.	The signature 1.8-meter tube crest could generate deep, foghorn-like acoustic signals across long distances.	Possessed a solid, backward-pointing bony spine that anchored a large inflatable nose sac balloon.	The largest known non-sauropod dinosaur in the fossil record, surpassing many sauropods in total weight.	Pop culture long depicted its horn as a straight unicorn spike; we now know it supported a hollow skin crest.

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Part 1 - Basal & Flat-Headed Morphs

Profile Field	Goyocephale lattimorei	Homalocephale calathocercos	Wannanosaurus yansiensis
Scientific Name	Goyocephale lattimorei	Homalocephale calathocercos	Wannanosaurus yansiensis
Size	2 meters (6.5 ft) long	1.8 meters (6 ft) long	0.6 meters (2 ft) long
Diet	Herbivore / Omnivore	Herbivore / Omnivore	Herbivore / Omnivore
Habitat	Semi-arid highland scrub, floodplains	Arid desert oases, sand dunes	Subtropical open coastal woodlands
Where Found / Formation	Mongolia; Baruungoyot Formation	Mongolia; Nemegt Formation	Anhui, China; Xiaoxiong Formation
Time	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Campanian, ~72 Ma)
Related Genera	Homalocephale, Prenocephale	Goyocephale, Wannanosaurus	Homalocephale, Colepiocephale
Chart Table Data
🔹 Meaning	"Elegant head honoring Owen Lattimore"	"Even/flat head with a basket tail"	"Wannano lizard from Yansi"
🔹 Species	G. lattimorei	H. calathocercos	W. yansiensis
🔹 Diet	Coarse leaves, seeds, insects	Tough desert brush, roots, small seeds	Soft leaves, low-growing herbs, insects
🔹 Epoch / Stage / Years	Late Cretaceous (Campanian)	Late Cretaceous (~70 Ma)	Late Cretaceous (Campanian)
🔹 Origin (Franchise)	Jurassic World Evolution 2	Jurassic Park: Operation Genesis, JWE2	Early Asian pachycephalosaur monographs
🔹 Estimated L & H	L: 2m, H: 0.6m	L: 1.8m, H: 0.55m	L: 0.6m, H: 0.22m
🔹 Weight	10 – 18 kg	40 kg	1.5 kg
🔹 Collected	Partial skull, jaw, fragmented postcrania	Exquisite flat skull, highly wide pelvis	Fragmentary tiny skull roof, partial femur
🔹 Status / Author / Year	Valid; Perle et al., 1982	Valid; Maryańska & Osmólska, 1974	Valid; Hou, 1977
🔹 Area / Locality	Ömnögovi Province, Gobi Desert, Mongolia	Nemegt Basin, Gobi Desert, Mongolia	Yansi, Wanning County, Anhui, China
🔹 Brian's Comments	The flat, highly textured skull indicates that dome-headedness wasn't universal across this lineage.	Possessed a remarkably wide hip structure, pointing to either live-birth traits or heavy gut fermentation.	Remains one of the smallest non-avian dinosaur specimens ever found in Asia; likely a juvenile.

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Part 2 - The Hell Creek Growth Series (The Pachycephalosaurus Conundrum)

Profile Field	Dracorex hogwartsia	Stygimoloch spinifer	Pachycephalosaurus wyomingensis	Prenocephale prenes
Scientific Name	Dracorex hogwartsia	Stygimoloch spinifer	Pachycephalosaurus wyomingensis	Prenocephale prenes
Size	3 meters (10 ft) long	3 meters (10 ft) long	4.5 meters (15 ft) long	2.4 meters (8 ft) long
Diet	Herbivore	Herbivore	Herbivore / Omnivore	Herbivore
Habitat	Open coastal plains, flood basins	River forest channels, plains	Forested floodplains, valley slopes	Subtropical upland pine forests
Where Found / Formation	SD, USA; Hell Creek Formation	MT, WY, USA; Hell Creek Formation	WY, MT, SD, USA; Hell Creek	Mongolia; Nemegt Formation
Time	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Stygimoloch, Pachycephalosaurus	Dracorex, Pachycephalosaurus	Alaskacephale, Sphaerotholus	Tylocephale, Foraminacephale
Chart Table Data
🔹 Meaning	"Dragon king of Hogwarts"	"Spiked demon from the River Styx"	"Thick-headed lizard from Wyoming"	"Sloping head, prominent"
🔹 Species	D. hogwartsia	S. spinifer	P. wyomingensis	P. prenes
🔹 Diet	Tough shrubs, ferns, low seeds	Fibrous land plants, roots, berries	Leaves, seeds, fruits, insects	Broad leaves, low-lying upland brush
🔹 Epoch / Stage / Years	Late Cretaceous (~67–66 Ma)	Late Cretaceous (~67–66 Ma)	Late Cretaceous (~68–66 Ma)	Late Cretaceous (~70 Ma)
🔹 Origin (Franchise)	Universal Studios (Naming event), JWE2	Jurassic World: Fallen Kingdom, JWE2	The quintessential classic "Dome-head" face	Dino Dan, Walking with Dinosaurs games
🔹 Estimated L & H	L: 3m, H: 0.9m	L: 3m, H: 1.0m	L: 4.5m, H: 1.5 meters	L: 2.4m, H: 0.8m
🔹 Weight	100 kg	150 kg	450 kg	130 kg
🔹 Collected	Single near-perfect uncrusted flat skull	Multiple spiked skulls, partial skeletons	Dozens of massive, solid bone domes	Spectacular, highly complete smooth skull
🔹 Status / Author / Year	Disputed (Synonym of Pachycephalosaurus)	Disputed (Synonym of Pachycephalosaurus)	Valid; Brown & Schlaikjer, 1943	Valid; Maryańska & Osmólska, 1974
🔹 Area / Locality	Corson County, South Dakota, USA	McCone County, Montana, USA	Niobrara County, Wyoming, USA	Nemegt Basin, Gobi Desert, Mongolia
🔹 Brian's Comments	Modern bone analysis shows it lacked growth rings; it's a juvenile Pachycephalosaurus before its dome inflated.	Now widely accepted as the sub-adult growth stage of Pachycephalosaurus, where horns peaked before reabsorbing.	The massive, solid 22cm thick skull dome was actively remodeled throughout its lifespan.	Boasted a rounder, more sloping dome compared to its American cousins, laced with specialized nose chambers.

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Family Psittacosauridae & Basal Protoceratopidae

Profile Field	Psittacosaurus meileyingensis	Auroraceratops rugosus	Bagaceratops rozhdestvenskyi
Scientific Name	Psittacosaurus meileyingensis	Auroraceratops rugosus	Bagaceratops rozhdestvenskyi
Size	2 meters (6.5 ft) long	1.25 meters (4 ft) long	1 meter (3.3 ft) long
Diet	Herbivore (Nut specialist)	Herbivore	Herbivore
Habitat	Seasonal temperate forest lakes	Intermontane arid basins, oases	Arid desert plains, shifting dunes
Where Found / Formation	Liaoning, China; Jiufotang Formation	Gansu, China; Xinminbao Group	Mongolia; Baruungoyot Formation
Time	Early Cretaceous (Aptian, ~120 Ma)	Early Cretaceous (Aptian, ~115 Ma)	Late Cretaceous (Campanian, ~75 Ma)
Related Genera	Hongshanosaurus, Yinlong	Archaeoceratops, Liaoceratops	Protoceratops, Breviceratops
Chart Table Data
🔹 Meaning	"Parrot lizard from Meileyingzi"	"Dawn horned face, heavily wrinkled"	"Small horned face honoring Rozhdestvensky"
🔹 Species	P. meileyingensis	A. rugosus	B. rozhdestvenskyi
🔹 Diet	Tough seed cones, nuts, cycad stalks	Fibrous lake-side roots, low vegetation	Desert shrubs, tough ground-level leaves
🔹 Epoch / Stage / Years	Early Cretaceous (Aptian)	Early Cretaceous (~115 Ma)	Late Cretaceous (Campanian)
🔹 Origin (Franchise)	Prehistoric Planet, Fossil textbooks	Early 2000s Asian horned dinosaur papers	Gobi Desert discovery expedition records
🔹 Estimated L & H	L: 2m, H: 0.6m	L: 1.25m, H: 0.4m	L: 1m, H: 0.35m
🔹 Weight	30 kg	15 kg	22 kg
🔹 Collected	Complete articulated skulls & skeletons	~80 distinct individuals, pristine skeletons	Over 20 pristine, small-scale skulls
🔹 Status / Author / Year	Valid; Sereno et al., 1988	Valid; You et al., 2005	Valid; Maryańska & Osmólska, 1975
🔹 Area / Locality	Chaoyang City, Liaoning Province, China	Mazongshan area, Gansu Province, China	Hermiin Tsav, Gobi Desert, Mongolia
🔹 Brian's Comments	Wore a highly unique set of defensive flared cheek horns alongside a deep, crushing parrot beak.	The rugose, wrinkled jaw joints were likely anchored to massive muscular chewing blocks.	Lacked a distinct frill opening, instead forming a thick, solid shield to protect its short neck.

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Advanced Family Protoceratopidae & Basal Ceratopia

Profile Field	Leptoceratops gracilis	Microceratus gobiensis	Montanoceratops cerorhynchus	Protoceratops hellenikorhinus
Scientific Name	Leptoceratops gracilis	Microceratus gobiensis	Montanoceratops cerorhynchus	Protoceratops hellenikorhinus
Size	2 meters (6.5 ft) long	0.6 meters (2 ft) long	3 meters (10 ft) long	2 – 2.5 meters (6.5–8 ft) long
Diet	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Forested semi-arid floodplains	Arid scrub deserts, wind dunes	Open upland valleys, parklands	Sandy desert oases, dune lines
Where Found / Formation	Alberta, Canada; Scollard Formation	Mongolia; Djadochta Formation	Montana, USA; St. Mary River	Mongolia; Bayan Mandahu Formation
Time	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Campanian, ~72 Ma)
Related Genera	Udanoceratops, Prenoceratops	Graciliceratops, Albalophosaurus	Leptoceratops, Cerasinops	P. andrewsi, Bagaceratops
Chart Table Data
🔹 Meaning	"Slender small horned face, elegant"	"Tiny horned beast from the Gobi"	"Montana horned face, horn-nosed"	"First horned face, Greek-nosed"
🔹 Species	L. gracilis	M. gobiensis	M. cerorhynchus	P. hellenikorhinus
🔹 Diet	Tough low ferns, cycad branches	Small desert leaves, low seed pods	Conifer needles, tough river shrubs	Low fibrous desert flora, roots
🔹 Epoch / Stage / Years	Late Cretaceous (~66 Ma)	Late Cretaceous (Campanian)	Late Cretaceous (~67 Ma)	Late Cretaceous (Campanian)
🔹 Origin (Franchise)	Early North American ceratopsian texts	Jurassic World (Novel name change token)	Prehistoric Kingdom, Paleoart circles	Gobi Desert systematic revisions
🔹 Estimated L & H	L: 2m, H: 0.75m	L: 0.6m, H: 0.25m	L: 3m, H: 1.0m	L: 2.2m, H: 0.85 meters
🔹 Weight	100 – 150 kg	4 – 5 kg	170 kg	200 – 300 kg
🔹 Collected	Near-complete skeletons lacking tails	Limited fragmentary jaw and limb segments	Incomplete skeleton with a pristine skull	Multiple robust skulls showing double crests
🔹 Status / Author / Year	Valid; Brown, 1914	Valid; Mateus, 2008	Valid; Sternberg, 1951	Valid; Lambert et al., 2001
🔹 Area / Locality	Red Deer River, Alberta, Canada	Gobi Desert, Inner Mongolia, China	Glacier County, Montana, USA	Bayan Mandahu, Inner Mongolia, China
🔹 Brian's Comments	Lived right up to the asteroid impact, completely independent of the giant horn ceratopsians.	Renamed from Microceratops in 2008 after discovering the name was already taken by a wasp.	Wore a distinct nasal horn ridge that bridged primitive morphs with giant quadrupedal lines.	Sharply split from P. andrewsi by an ornate, dual-flanged ridge along its nose.

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Part 1 - Centrosaurinae (Short-Frilled, Large-Nosed Morphs)

Profile Field	Centrosaurus apertus	Lokiceratops rangiformis	Nasutoceratops titusi	Pachyrhinosaurus lakustai	Sinoceratops zhuchengensis	Styracosaurus ovatus (Spinops)
Scientific Name	Centrosaurus apertus	Lokiceratops rangiformis	Nasutoceratops titusi	Pachyrhinosaurus lakustai	Sinoceratops zhuchengensis	Styracosaurus ovatus
Size	5.5 – 6 meters long	6.7 meters (22 ft) long	4.5 – 5 meters long	6 – 7 meters long	6 meters (20 ft) long	5.5 meters (18 ft) long
Diet	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Coastal swamps, marshes	Subtropical coastal plains	Coastal swamp estuaries	Semi-arid coastal lagoons	Coastal river valleys	Inland floodplain woods
Where Found / Formation	Alberta; Dinosaur Park	Montana, USA; Judith River	Utah; Kaiparowits Formation	Alberta; Wapiti Formation / Montana, USA; Hell Creek Formation	Shandong; Wangshi Group	Montana; Two Medicine
Time	Late Cretaceous (Campanian)	Late Cretaceous (Campanian, ~78 Ma)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Campanian, ~73 Ma)	Late Cretaceous (Campanian, ~73 Ma)	Late Cretaceous (Campanian, ~75 Ma)
Related Genera	Monoclonius, Styracosaurus	Medusaceratops, Albertaceratops	Avaceratops, Yehuecauhceratops	Achelousaurus, Einiosaurus	Wendiceratops, Albertaceratops	Rubeosaurus, Centrosaurus
Chart Table Data
🔹 Meaning	"Pointed lizard, uncovered"	"Loki's horned face like a caribou"	"Large-nosed horned face, Titus's"	"Thick-nosed lizard, Lakusta's"	"Chinese horned face from Zhucheng"	"Spiked lizard, oval"
🔹 Species	C. apertus	L. rangiformis	N. titusi	P. lakustai	Subadult holotype elements	S. ovatus
🔹 Diet	Tough ferns, low shrubs	Low fibrous plants, cycads	High-fiber woody plants, reeds	Fibrous cycads, woody river brush	Coarse regional tree bark, leaves	Low ground ferns, palm leaves
🔹 Epoch / Stage / Years	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~78 Ma)	Late Cretaceous (~75.5 Ma)	Late Cretaceous (~73.5 Ma)	Late Cretaceous (~73 Ma)	Late Cretaceous (~75 Ma)
🔹 Origin (Franchise)	Disney's Dinosaur, JWE2	Newly named in 2024	Jurassic World Evolution 2	Walking with Dinosaurs (Movie)	Jurassic World Fallen Kingdom, JWE2	Dinosaur King, JWE2
🔹 Estimated L & H	L: 5.5m, H: 2.1m	L: 6.7m, H: 2.4 meters	L: 4.8m, H: 1.9m	L: 6m, H: 2.3 meters	L: 6m, H: 2.2m	L: 5.5m, H: 2.0m
🔹 Weight	2.3 metric tons	5 metric tons	1.5 metric tons	3 – 4 metric tons	2 metric tons	2.5 metric tons
🔹 Collected	Massive multi-individual bonebeds	Exquisite partial skull, frill spikes	Near-complete pristine skull, limbs	Massive bonebeds of 1,000+ monsters	Massive partial jaw and frill bits	Incomplete skull, massive frill hooks
🔹 Status / Author / Year	Valid; Lambe, 1904	Valid; Loewen et al., 2024	Valid; Sampson et al., 2013	Valid; Fiorillo & Tykoski, 2012	Valid; Xu et al., 2010	Valid; Gilmore, 1930 [1]
🔹 Area / Locality	Red Deer River, Alberta	Blaine County, Montana, USA	Garfield County, Utah, USA	Pipestone Creek, Alberta, Canada / Niobrara County, Wyoming, USA	Zhucheng City, Shandong, China	Blackfeet Reservation, Montana
🔹 Brian's Comments	Massive bonebeds tell us that entire migrating herds were wiped out at river crossings.	Discovered in 2024, it carries massive, curved blade-like frill horns mimicking the Norse god's helmet. [2]	Wore completely unique forward-curved horns that look remarkably like modern cattle.	Replaced standard brow horns with a massive, solid flat bone boss used for head-shoving battles.	The first valid large-scale long-horn ceratopsian ever discovered in Asia.	Recent re-evaluations consolidate S. ovatus away from Rubeosaurus back into classic Styracosaurus.

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Part 2 - Chasmosaurinae (Long-Frilled, Large-Brow Horn Morphs)

Profile Field	Chasmosaurus belli	Torosaurus latus	Triceratops horridus
Scientific Name	Chasmosaurus belli	Torosaurus latus	Triceratops horridus
Size	4.5 – 5 meters (15–16 ft) long	7.5 – 8 meters (25–26 ft) long	8 – 9 meters (26–30 ft) long
Diet	Herbivore	Herbivore	Herbivore (Low ground specialist)
Habitat	Low floodplains, delta swamp forests	Open coastal plains, meadows	Coastlines, forested river channels
Where Found / Formation	Alberta, Canada; Dinosaur Park	WY, MT, SD, USA; Hell Creek	WY, MT, SD, USA; Hell Creek Formation
Time	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Late Maastrichtian)
Related Genera	Vagaceratops, Mojoceratops	Triceratops, Nedoceratops	Torosaurus, Eotriceratops
Chart Table Data
🔹 Meaning	"Opening lizard honoring Walter Bell"	"Perforated lizard, wide-built"	"Three-horned face, roughened/horrid"
🔹 Species	C. belli	T. latus	T. horridus
🔹 Diet	High-fiber ferns, shrubs, low brush	Tough ground brush, cycads, bark	Fibrous palms, cycads, woody branches
🔹 Epoch / Stage / Years	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~68–66 Ma)	Late Cretaceous (~68–66 Ma)
🔹 Origin (Franchise)	Jurassic Park: Operation Genesis, JWE2	Walking with Dinosaurs, JWE2	The global undisputed giant king of ceratopsians
🔹 Estimated L & H	L: 4.8m, H: 1.7m	L: 7.8m, H: 2.5 meters	L: 8.5m, H: 2.9 meters
🔹 Weight	2 metric tons	6 metric tons	6 – 10 metric tons
🔹 Collected	Complete skin impression mummies, skulls	Immense skulls over 2.7 meters long	Hundreds of robust skulls, partial skeletons
🔹 Status / Author / Year	Valid; Lambe, 1914	Valid; Marsh, 1891	Valid; Marsh, 1889
🔹 Area / Locality	Red Deer River, Alberta, Canada	Niobrara County, Wyoming, USA	Weston County, Wyoming, USA
🔹 Brian's Comments	The expansive bone frill was completely hollowed out by large windows, likely purely for skin color displays.	Carried one of the largest skulls of any land animal in history, lanced with deep frill fenestrae.	The massive bone frill was completely solid, built as a true heavy shield against the bite of T. rex.

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Family Stegosauridae (Part 1 - Afro-Eurasian Spiked Morphs)

Profile Field	Chungkingosaurus jiangbeiensis	Gigantspinosaurus sichuanensis	Kentrosaurus aethiopicus	Miragaia longicollum
Scientific Name	Chungkingosaurus jiangbeiensis	Gigantspinosaurus sichuanensis	Kentrosaurus aethiopicus	Miragaia longicollum
Size	3 – 4 meters (10–13 ft) long	4.2 meters (14 ft) long	4.5 meters (15 ft) long	5.5 – 6.5 meters (18–21 ft) long
Diet	Herbivore (Low browser)	Herbivore (Low browser)	Herbivore (Low-to-mid browser)	Herbivore (High-reach browser)
Habitat	Dense subtropical river plains	Lush inland river basins, forests	Semi-arid coastal shrublands	Subtropical coastal delta forests
Where Found / Formation	China; Upper Shaximiao Formation	China; Upper Shaximiao Formation	Tanzania; Tendaguru Formation	Portugal; Lourinhã Formation
Time	Late Jurassic (Oxfordian, ~160 Ma)	Late Jurassic (Oxfordian, ~160 Ma)	Late Jurassic (Kimmeridgian–Tithonian)	Late Jurassic (Kimmeridgian–Tithonian)
Related Genera	Tuojiangosaurus, Chialingosaurus	Tuojiangosaurus, Huayangosaurus	Stegosaurus, Lexovisaurus	Dacentrurus, Alcovasaurus
Chart Table Data
🔹 Meaning	"Chongqing lizard from Jiangbei"	"Giant-spined lizard from Sichuan"	"Prickly lizard from Ethiopia/Africa"	"Miragaia beautiful giant with long neck"
🔹 Species	C. jiangbeiensis	G. sichuanensis	K. aethiopicus	M. longicollum
🔹 Diet	Soft ferns, cycads, low mosses	Ground ferns, cycad stalks	Tough woody shrubs, seed ferns	Mid-tier conifers, cycads, tree fern fronds
🔹 Epoch / Stage / Years	Late Jurassic (Oxfordian)	Late Jurassic (Oxfordian)	Late Jurassic (~152 Ma)	Late Jurassic (~150 Ma)
🔹 Origin (Franchise)	Jurassic World Evolution 2	Early Chinese stegosaur monographs	Jurassic Park: Operation Genesis, JWE2	Dinosaur Revolution, Paleoart circles
🔹 Estimated L & H	L: 3.5m, H: 1.1m	L: 4.2m, H: 1.4m	L: 4.5m, H: 1.6m	L: 6m, H: 2.1 meters
🔹 Weight	500 – 700 kg	700 kg	700 – 1,100 kg	2 metric tons
🔹 Collected	Three partial skeletons, skulls	Articulated skeleton with skin impressions	Hundreds of bones from a bonebed site	Near-complete skeleton lacking back half
🔹 Status / Author / Year	Valid; Dong et al., 1983	Valid; Ouyang, 1992	Valid; Hennig, 1915	Valid; Mateus et al., 2009
🔹 Area / Locality	Chongqing City, Sichuan, China	Zigong, Sichuan Province, China	Lindi Region, Tendaguru, Tanzania	Lourinhã Municipality, Portugal
🔹 Brian's Comments	The smallest stegosaur found in the Shaximiao beds; it sported deep, blocky plates.	Wore truly astronomical shoulder spines that flared outward like a pair of wings.	A highly localized defensive fighter with plates along the neck that gave way to spikes over the hips.	Broke all stegosaur rules with a sauropod-like long neck built of 17 cervical vertebrae.

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Family Stegosauridae (Part 2) & Family Scelidosauridae

Profile Field	Stegosaurus stenops	Tuojiangosaurus multispinus	Scelidosaurus harrisonii
Scientific Name	Stegosaurus stenops	Tuojiangosaurus multispinus	Scelidosaurus harrisonii
Size	7 – 9 meters (23–30 ft) long	7 meters (23 ft) long	4 meters (13 ft) long
Diet	Herbivore (Low ground browser)	Herbivore (Low ground browser)	Herbivore (Low ground browser)
Habitat	Semi-arid open savannas, valleys	Subtropical forested floodplains	Coastal beach margins, marine margins
Where Found / Formation	Western USA; Morrison Formation	China; Upper Shaximiao Formation	England; Charmouth Mudstone Formation
Time	Late Jurassic (Kimmeridgian–Tithonian)	Late Jurassic (Oxfordian, ~160 Ma)	Early Jurassic (Sinemurian–Pliensbachian)
Related Genera	S. sulcatus, Hesperosaurus	Chungkingosaurus, Kentrosaurus	Emausaurus, Scutellosaurus
Chart Table Data
🔹 Meaning	"Roof/covered lizard, narrow-faced"	"Tuo River lizard with many spikes"	"Limb lizard honoring James Harrison"
🔹 Species	S. stenops	T. multispinus	Scelidosaurus harrisonii
🔹 Diet	Low horsetails, ferns, club mosses	Soft ground vegetation, ferns	Early Jurassic ground ferns, cycads
🔹 Epoch / Stage / Years	Late Jurassic (~155–150 Ma)	Late Jurassic (Oxfordian)	Early Jurassic (~191 Ma)
🔹 Origin (Franchise)	The classic globally recognizable titan of Jurassic Park	Dinosaur King, Early Asian display replicas	Classic English evolutionary texts
🔹 Estimated L & H	L: 8m, H: 4 meters (Plate peaks)	L: 7m, H: 2.2 meters (Thagomizer tip)	L: 4m, H: 1.1m
🔹 Weight	4 – 5.3 metric tons	2.8 metric tons	270 kg
🔹 Collected	Dozens of exquisite complete mummies, skulls	Two near-perfect complete skeletons, skulls	Complete, perfectly articulated skeletons
🔹 Status / Author / Year	Valid; Marsh, 1887	Valid; Dong et al., 1977	Valid; Owen, 1859
🔹 Area / Locality	Cañon City, Fremont County, Colorado, USA	Zigong, Sichuan Province, China	Charmouth, Dorset, England
🔹 Brian's Comments	The massive vertical plates were highly porous and thin, functioning as billboard visual displays.	The primary complete mounted stegosaur skeleton ever displayed to the public in Asia.	One of the earliest common ancestors of the entire armored dinosaur lineage.

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Family Nodosauridae (The Spiked Shields)

Profile Field	Edmontonia rugosidens	Gastonia lorriemcwhinneyae	Nodosaurus textilis	Sauropelta edwardsorum	Silvisaurus condrayi	Struthiosaurus transylvanicus
Scientific Name	Edmontonia rugosidens	Gastonia lorriemcwhinneyae	Nodosaurus textilis	Sauropelta edwardsorum	Silvisaurus condrayi	Struthiosaurus transylvanicus
Size	6 meters (20 ft) long	4.5 – 5 meters long	4 – 6 meters long	5.2 meters (17 ft) long	4 meters (13 ft) long	2 – 3 meters (6.5–10 ft) long
Diet	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Subtropical wet forests	Semi-arid open floodplains	Coastal delta floodplains	Subtropical marshy lowlands	Warm coastal plains, margins	European island floodplains
Where Found / Formation	Alberta; Dinosaur Park	Utah; Cedar Mountain	Wyoming; Frontier Formation	Montana, WY; Cloverly	Kansas; Dakota Formation	Romania; Sânpetru Formation
Time	Late Cretaceous (Campanian)	Early Cretaceous (Barremian)	Late Cretaceous (Cenomanian)	Early Cretaceous (Albian)	Late Cretaceous (Cenomanian)	Late Cretaceous (Maastrichtian)
Related Genera	Panoplosaurus, Denversaurus	Gargoyleosaurus, Polacanthus	Sauropelta, Animantarx	Silvisaurus, Edmontonia	Sauropelta, Pawpawsaurus	Hungarosaurus, Anoplosaurus
Chart Table Data
🔹 Meaning	"Edmonton shield, wrinkled teeth"	"Gaston's shield, McWhinney's"	"Knobbed lizard, woven pattern"	"Lizard shield honoring Edwards"	"Forest lizard honoring Condray"	"Ostrich lizard from Transylvania"
🔹 Species	E. rugosidens	G. lorriemcwhinneyae	N. textilis	S. edwardsorum	S. condrayi	S. transylvanicus
🔹 Diet	Soft ground flora, berries	Low ferns, early shrubs	Ground mosses, low ferns	Tough cycads, low ground ferns	Soft coastal herbs, leaves	Isolated island shrubs, mosses
🔹 Epoch / Stage / Years	Late Cretaceous (~76 Ma)	Early Cretaceous (~125 Ma)	Late Cretaceous (~95 Ma)	Early Cretaceous (~108 Ma)	Late Cretaceous (~100 Ma)	Late Cretaceous (~66 Ma)
🔹 Origin (Franchise)	Jurassic Park: Operation Genesis, JWE2	Walking with Dinosaurs (BBC book/game)	Core foundation textbooks	Monsters Resurrected, JWE2	Kansas state fossil records	Franz Nopcsa's historical monographs
🔹 Estimated L & H	L: 6m, H: 1.6m	L: 4.6m, H: 1.2m	L: 5m, H: 1.3m	L: 5.2m, H: 1.4 meters	L: 4m, H: 1.0m	L: 2.2m, H: 0.7m
🔹 Weight	3 metric tons	1.9 metric tons	2 metric tons	1.5 metric tons	1 metric ton	300 – 400 kg
🔹 Collected	Multiple complete skulls, mummies	Bonebeds containing thousands of plates	Partial skeleton lacking skull elements	Exceptionally well-preserved armor mats	Single skull, partial skeleton, armor	Fragmentary skull roof, armor plates
🔹 Status / Author / Year	Valid; Gilmore, 1930	Valid; Kinneer et al., 2016	Valid; Marsh, 1889	Valid; Ostrom, 1970	Valid; Eaton, 1960	Valid; Nopcsa, 1915
🔹 Area / Locality	Red Deer River, Alberta	Grand County, Utah, USA	Albany County, Wyoming, USA	Bighorn County, Montana, USA	Ottawa County, Kansas, USA	Hațeg Island, Transylvania
🔹 Brian's Comments	Fitted with forward-jutting shoulder spines used for fencing with rival males.	Separated from G. burgei by subtle arrangements in the pelvic shield plates.	The generic namesake of the entire group, yet remains a poorly understood fossil.	The massive, mosaic shoulder spikes were locked deep into the skeletal structure.	A very primitive North American form that kept standard teeth inside its beak.	A textbook example of island dwarfism, shrinking away from giant mainland size.

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Family Ankylosauridae (The True Club-Tails)

Profile Field	Ankylosaurus magniventris	Euoplocephalus tutus	Minmi paravertebral	Saichania chulsanensis	Scolosaurus thronus	Tarchia teresae
Scientific Name	Ankylosaurus magniventris	Euoplocephalus tutus	Minmi paravertebral	Saichania chulsanensis	Scolosaurus thronus	Tarchia teresae
Size	8 – 10 meters (26–33 ft) long	5.5 – 6 meters long	2.5 – 3 meters long	5.2 meters (17 ft) long	5 – 6 meters long	5.5 – 6.5 meters long
Diet	Herbivore	Herbivore (Low browser)	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Subtropical forest floodplains	Warm coastal floodplains	Coastal open forests, lagoons	Arid desert oases, dunes	Subtropical wet river basins	Arid inland river valley beds
Where Found / Formation	Western USA; Hell Creek Formation	Alberta; Dinosaur Park	Queensland; Bungal Formation	Mongolia; Barun Goyot	Alberta; Dinosaur Park	Mongolia; Barun Goyot
Time	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Campanian, ~76 Ma)	Early Cretaceous (Aptian, ~115 Ma)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Campanian–Maastrichtian)
Related Genera	Anodontosaurus, Scolosaurus	Ankylosaurus, Dyoplosaurus	Kunbarrasaurus	Tarchia, Zaraapelta	Euoplocephalus, Ankylosaurus	Saichania, Minotaurasaurus
Chart Table Data
🔹 Meaning	"Fused lizard with a massive belly"	"Well-armored head, safe"	"Minmi Crossing, extra bone tracks"	"Beautiful one from Chulsan"	"Spike lizard from the throne"
🔹 Species	A. magniventris	E. tutus	M. paravertebral	S. chulsanensis	S. thronus	T. teresae
🔹 Diet	Low-lying fibrous ferns, woody brush	Ground leaves, tubers, ferns	Soft low mosses, lake weeds	Tough desert shrubs, roots	Low ground ferns, shrubs	Fibrous desert scrub, scrub roots
🔹 Epoch / Stage / Years	Late Cretaceous (~68–66 Ma)	Late Cretaceous (~76.5 Ma)	Early Cretaceous (Aptian)	Late Cretaceous (~75 Ma)	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~72–70 Ma)
🔹 Origin (Franchise)	The legendary ultimate heavy armor icon	Jurassic Park: The Game, JWE2	Walking with Dinosaurs (BBC game)	Dinosaur King, Mesozoic models	Standard museum display mounts	Early Gobi armored field logs
🔹 Estimated L & H	L: 9m, H: 1.7 meters	L: 5.5m, H: 1.4m	L: 2.5m, H: 0.75m	L: 5.2m, H: 1.5m	L: 5.6m, H: 1.4m	L: 6m, H: 1.8 meters
🔹 Weight	5 – 8 metric tons	2.5 metric tons	300 kg	2.4 metric tons	2.5 metric tons	3 metric tons
🔹 Collected	Fragmentary skulls, immense tail clubs	Over 40 complete skeletons, skulls	Spectacular 3D skeleton with gut contents	Pristine articulated skull and armor coat	Near-perfect skeleton with skin mats	Giant, massive reinforced skulls
🔹 Status / Author / Year	Valid; Brown, 1908	Valid; Lambe, 1902	Valid; Molnar, 1980	Valid; Maryańska, 1977	Valid; Nopcsa, 1928	Valid; Penkalski, 2016
🔹 Area / Locality	Garfield County, Montana, USA	Red Deer River, Alberta, Canada	Roma, Queensland, Australia	Khermeen Tsav, Gobi Desert	Red Deer River, Alberta, Canada	Nemegt Basin, Gobi Desert
🔹 Brian's Comments	The tail club was a dense bone block capable of shattering a Tyrannosaurus leg.	The eyelids were armored with bony shutters to protect the eyes from predators.	Possessed unique, extra bone struts alongside its spine to reinforce its small chassis.	The nasal passages were complexly looped to conserve body moisture in arid environments.	Long buried under Euoplocephalus until recent reviews restored its unique identity.	The largest known Asian ankylosaur, with skull bone structures engineered to absorb heavy blows.

Family Stegosauridae (Part 1 - Afro-Eurasian Spiked Morphs)

Profile Field	Chungkingosaurus jiangbeiensis	Gigantspinosaurus sichuanensis	Kentrosaurus aethiopicus	Miragaia longicollum
Scientific Name	Chungkingosaurus jiangbeiensis	Gigantspinosaurus sichuanensis	Kentrosaurus aethiopicus	Miragaia longicollum
Size	3 – 4 meters (10–13 ft) long	4.2 meters (14 ft) long	4.5 meters (15 ft) long	5.5 – 6.5 meters (18–21 ft) long
Diet	Herbivore (Low browser)	Herbivore (Low browser)	Herbivore (Low-to-mid browser)	Herbivore (High-reach browser)
Habitat	Dense subtropical river plains	Lush inland river basins, forests	Semi-arid coastal shrublands	Subtropical coastal delta forests
Where Found / Formation	China; Upper Shaximiao Formation	China; Upper Shaximiao Formation	Tanzania; Tendaguru Formation	Portugal; Lourinhã Formation
Time	Late Jurassic (Oxfordian, ~160 Ma)	Late Jurassic (Oxfordian, ~160 Ma)	Late Jurassic (Kimmeridgian–Tithonian)	Late Jurassic (Kimmeridgian–Tithonian)
Related Genera	Tuojiangosaurus, Chialingosaurus	Tuojiangosaurus, Huayangosaurus	Stegosaurus, Lexovisaurus	Dacentrurus, Alcovasaurus
Chart Table Data
🔹 Meaning	"Chongqing lizard from Jiangbei"	"Giant-spined lizard from Sichuan"	"Prickly lizard from Ethiopia/Africa"	"Miragaia beautiful giant with long neck"
🔹 Species	C. jiangbeiensis	G. sichuanensis	K. aethiopicus	M. longicollum
🔹 Diet	Soft ferns, cycads, low mosses	Ground ferns, cycad stalks	Tough woody shrubs, seed ferns	Mid-tier conifers, cycads, tree fern fronds
🔹 Epoch / Stage / Years	Late Jurassic (Oxfordian)	Late Jurassic (Oxfordian)	Late Jurassic (~152 Ma)	Late Jurassic (~150 Ma)
🔹 Origin (Franchise)	Jurassic World Evolution 2	Early Chinese stegosaur monographs	Jurassic Park: Operation Genesis, JWE2	Dinosaur Revolution, Paleoart circles
🔹 Estimated L & H	L: 3.5m, H: 1.1m	L: 4.2m, H: 1.4m	L: 4.5m, H: 1.6m	L: 6m, H: 2.1 meters
🔹 Weight	500 – 700 kg	700 kg	700 – 1,100 kg	2 metric tons
🔹 Collected	Three partial skeletons, skulls	Articulated skeleton with skin impressions	Hundreds of bones from a bonebed site	Near-complete skeleton lacking back half
🔹 Status / Author / Year	Valid; Dong et al., 1983	Valid; Ouyang, 1992	Valid; Hennig, 1915	Valid; Mateus et al., 2009
🔹 Area / Locality	Chongqing City, Sichuan, China	Zigong, Sichuan Province, China	Lindi Region, Tendaguru, Tanzania	Lourinhã Municipality, Portugal
🔹 Brian's Comments	The smallest stegosaur found in the Shaximiao beds; it sported deep, blocky plates.	Wore truly astronomical shoulder spines that flared outward like a pair of wings.	A highly localized defensive fighter with plates along the neck that gave way to spikes over the hips.	Broke all stegosaur rules with a sauropod-like long neck built of 17 cervical vertebrae.

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Family Stegosauridae (Part 2) & Family Scelidosauridae

Profile Field	Stegosaurus stenops	Tuojiangosaurus multispinus	Scelidosaurus harrisonii
Scientific Name	Stegosaurus stenops	Tuojiangosaurus multispinus	Scelidosaurus harrisonii
Size	7 – 10 meters (23–33 ft) long	7 meters (23 ft) long	4 meters (13 ft) long
Diet	Herbivore (Low ground browser)	Herbivore (Low ground browser)	Herbivore (Low ground browser)
Habitat	Semi-arid open savannas, valleys	Subtropical forested floodplains	Coastal beach margins, marine margins
Where Found / Formation	Western USA; Morrison Formation	China; Upper Shaximiao Formation	England; Charmouth Mudstone Formation
Time	Late Jurassic (Kimmeridgian–Tithonian)	Late Jurassic (Oxfordian, ~160 Ma)	Early Jurassic (Sinemurian–Pliensbachian)
Related Genera	S. sulcatus, Hesperosaurus	Chungkingosaurus, Kentrosaurus	Emausaurus, Scutellosaurus
Chart Table Data
🔹 Meaning	"Roof/covered lizard, narrow-faced"	"Tuo River lizard with many spikes"	"Limb lizard honoring James Harrison"
🔹 Species	S. stenops	T. multispinus	Scelidosaurus harrisonii
🔹 Diet	Low horsetails, ferns, club mosses	Soft ground vegetation, ferns	Early Jurassic ground ferns, cycads
🔹 Epoch / Stage / Years	Late Jurassic (~155–150 Ma)	Late Jurassic (Oxfordian)	Early Jurassic (~191 Ma)
🔹 Origin (Franchise)	The classic globally recognizable titan of Jurassic Park	Dinosaur King, Early Asian display replicas	Classic English evolutionary texts
🔹 Estimated L & H	L: 10m, H: 4 meters (Plate peaks)	L: 7m, H: 2.2 meters (Thagomizer tip)	L: 4m, H: 1.1m
🔹 Weight	4 – 5.3 metric tons	2.8 metric tons	270 kg
🔹 Collected	Dozens of exquisite complete mummies, skulls	Two near-perfect complete skeletons, skulls	Complete, perfectly articulated skeletons
🔹 Status / Author / Year	Valid; Marsh, 1887	Valid; Dong et al., 1977	Valid; Owen, 1859
🔹 Area / Locality	Cañon City, Fremont County, Colorado, USA	Zigong, Sichuan Province, China	Charmouth, Dorset, England
🔹 Brian's Comments	The massive vertical plates were highly porous and thin, functioning as billboard visual displays.	The primary complete mounted stegosaur skeleton ever displayed to the public in Asia.	One of the earliest common ancestors of the entire armored dinosaur lineage.

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Family Nodosauridae (The Spiked Shields)

Profile Field	Edmontonia rugosidens	Gastonia lorriemcwhinneyae	Nodosaurus textilis	Sauropelta edwardsorum	Silvisaurus condrayi	Struthiosaurus transylvanicus
Scientific Name	Edmontonia rugosidens	Gastonia lorriemcwhinneyae	Nodosaurus textilis	Sauropelta edwardsorum	Silvisaurus condrayi	Struthiosaurus transylvanicus
Size	6 meters (20 ft) long	4.5 – 5 meters long	4 – 6 meters long	5.2 meters (17 ft) long	4 meters (13 ft) long	2 – 3 meters (6.5–10 ft) long
Diet	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Subtropical wet forests	Semi-arid open floodplains	Coastal delta floodplains	Subtropical marshy lowlands	Warm coastal plains, margins	European island floodplains
Where Found / Formation	Alberta; Dinosaur Park	Utah; Cedar Mountain	Wyoming; Frontier Formation	Montana, WY; Cloverly	Kansas; Dakota Formation	Romania; Sânpetru Formation
Time	Late Cretaceous (Campanian)	Early Cretaceous (Barremian)	Late Cretaceous (Cenomanian)	Early Cretaceous (Albian)	Late Cretaceous (Cenomanian)	Late Cretaceous (Maastrichtian)
Related Genera	Panoplosaurus, Denversaurus	Gargoyleosaurus, Polacanthus	Sauropelta, Animantarx	Silvisaurus, Edmontonia	Sauropelta, Pawpawsaurus	Hungarosaurus, Anoplosaurus
Chart Table Data
🔹 Meaning	"Edmonton shield, wrinkled teeth"	"Gaston's shield, McWhinney's"	"Knobbed lizard, woven pattern"	"Lizard shield honoring Edwards"	"Forest lizard honoring Condray"	"Ostrich lizard from Transylvania"
🔹 Species	E. rugosidens	G. lorriemcwhinneyae	N. textilis	S. edwardsorum	S. condrayi	S. transylvanicus
🔹 Diet	Soft ground flora, berries	Low ferns, early shrubs	Ground mosses, low ferns	Tough cycads, low ground ferns	Soft coastal herbs, leaves	Isolated island shrubs, mosses
🔹 Epoch / Stage / Years	Late Cretaceous (~76 Ma)	Early Cretaceous (~125 Ma)	Late Cretaceous (~95 Ma)	Early Cretaceous (~108 Ma)	Late Cretaceous (~100 Ma)	Late Cretaceous (~66 Ma)
🔹 Origin (Franchise)	Jurassic Park: Operation Genesis, JWE2	Walking with Dinosaurs (BBC book/game)	Core foundation textbooks	Monsters Resurrected, JWE2	Kansas state fossil records	Franz Nopcsa's historical monographs
🔹 Estimated L & H	L: 6m, H: 1.6m	L: 4.6m, H: 1.2m	L: 5m, H: 1.3m	L: 5.2m, H: 1.4 meters	L: 4m, H: 1.0m	L: 2.2m, H: 0.7m
🔹 Weight	3 metric tons	1.9 metric tons	2 metric tons	1.5 metric tons	1 metric ton	300 – 400 kg
🔹 Collected	Multiple complete skulls, mummies	Bonebeds containing thousands of plates	Partial skeleton lacking skull elements	Exceptionally well-preserved armor mats	Single skull, partial skeleton, armor	Fragmentary skull roof, armor plates
🔹 Status / Author / Year	Valid; Gilmore, 1930	Valid; Kinneer et al., 2016	Valid; Marsh, 1889	Valid; Ostrom, 1970	Valid; Eaton, 1960	Valid; Nopcsa, 1915
🔹 Area / Locality	Red Deer River, Alberta	Grand County, Utah, USA	Albany County, Wyoming, USA	Bighorn County, Montana, USA	Ottawa County, Kansas, USA	Hațeg Island, Transylvania
🔹 Brian's Comments	Fitted with forward-jutting shoulder spines used for fencing with rival males.	Separated from G. burgei by subtle arrangements in the pelvic shield plates.	The generic namesake of the entire group, yet remains a poorly understood fossil.	The massive, mosaic shoulder spikes were locked deep into the skeletal structure.	A very primitive North American form that kept standard teeth inside its beak.	A textbook example of island dwarfism, shrinking away from giant mainland size.

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Family Ankylosauridae (The True Club-Tails)

Profile Field	Ankylosaurus magniventris	Euoplocephalus tutus	Minmi paravertebral	Saichania chulsanensis	Scolosaurus thronus	Tarchia teresae
Scientific Name	Ankylosaurus magniventris	Euoplocephalus tutus	Minmi paravertebral	Saichania chulsanensis	Scolosaurus thronus	Tarchia teresae
Size	8 – 10 meters (26–33 ft) long	5.5 – 6 meters long	2.5 – 3 meters long	5.2 meters (17 ft) long	5 – 6 meters long	5.5 – 6.5 meters long
Diet	Herbivore	Herbivore (Low browser)	Herbivore	Herbivore	Herbivore	Herbivore
Habitat	Subtropical forest floodplains	Warm coastal floodplains	Coastal open forests, lagoons	Arid desert oases, dunes	Subtropical wet river basins	Arid inland river valley beds
Where Found / Formation	Western USA; Hell Creek Formation	Alberta; Dinosaur Park	Queensland; Bungal Formation	Mongolia; Barun Goyot	Alberta; Dinosaur Park	Mongolia; Barun Goyot
Time	Late Cretaceous (Late Maastrichtian)	Late Cretaceous (Campanian, ~76 Ma)	Early Cretaceous (Aptian, ~115 Ma)	Late Cretaceous (Campanian, ~75 Ma)	Late Cretaceous (Campanian, ~76 Ma)	Late Cretaceous (Campanian–Maastrichtian)
Related Genera	Anodontosaurus, Scolosaurus	Ankylosaurus, Dyoplosaurus	Kunbarrasaurus	Tarchia, Zaraapelta	Euoplocephalus, Ankylosaurus	Saichania, Minotaurasaurus
Chart Table Data
🔹 Meaning	"Fused lizard with a massive belly"	"Well-armored head, safe"	"Minmi Crossing, extra bone tracks"	"Beautiful one from Chulsan"	"Spike lizard from the throne"
🔹 Species	A. magniventris	E. tutus	M. paravertebral	S. chulsanensis	S. thronus	T. teresae
🔹 Diet	Low-lying fibrous ferns, woody brush	Ground leaves, tubers, ferns	Soft low mosses, lake weeds	Tough desert shrubs, roots	Low ground ferns, shrubs	Fibrous desert scrub, scrub roots
🔹 Epoch / Stage / Years	Late Cretaceous (~68–66 Ma)	Late Cretaceous (~76.5 Ma)	Early Cretaceous (Aptian)	Late Cretaceous (~75 Ma)	Late Cretaceous (~76.5 Ma)	Late Cretaceous (~72–70 Ma)
🔹 Origin (Franchise)	The legendary ultimate heavy armor icon	Jurassic Park: The Game, JWE2	Walking with Dinosaurs (BBC game)	Dinosaur King, Mesozoic models	Standard museum display mounts	Early Gobi armored field logs
🔹 Estimated L & H	L: 10m, H: 3.7 meters	L: 5.5m, H: 1.4m	L: 2.5m, H: 0.75m	L: 5.2m, H: 1.5m	L: 5.6m, H: 1.4m	L: 6m, H: 1.8 meters
🔹 Weight	5 – 8 metric tons	2.5 metric tons	300 kg	2.4 metric tons	2.5 metric tons	3 metric tons
🔹 Collected	Fragmentary skulls, immense tail clubs	Over 40 complete skeletons, skulls	Spectacular 3D skeleton with gut contents	Pristine articulated skull and armor coat	Near-perfect skeleton with skin mats	Giant, massive reinforced skulls
🔹 Status / Author / Year	Valid; Brown, 1908	Valid; Lambe, 1902	Valid; Molnar, 1980	Valid; Maryańska, 1977	Valid; Nopcsa, 1928	Valid; Penkalski, 2016
🔹 Area / Locality	Garfield County, Montana, USA	Red Deer River, Alberta, Canada	Roma, Queensland, Australia	Khermeen Tsav, Gobi Desert	Red Deer River, Alberta, Canada	Nemegt Basin, Gobi Desert
🔹 Brian's Comments	The tail club was a dense bone block capable of shattering a Tyrannosaurus leg.	The eyelids were armored with bony shutters to protect the eyes from predators.	Possessed unique, extra bone struts alongside its spine to reinforce its small chassis.	The nasal passages were complexly looped to conserve body moisture in arid environments.	Long buried under Euoplocephalus until recent reviews restored its unique identity.	The largest known Asian ankylosaur, with skull bone structures engineered to absorb heavy blows.

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Order Pelycosauria & Order Therapsida (Suborder Dicynodontia)

Profile Field	Dimetrodon grandis	Lystrosaurus curvatus	Bulbasaurus phylloxyron
Scientific Name	Dimetrodon grandis	Lystrosaurus curvatus	Bulbasaurus phylloxyron
Size	3.1 – 3.5 meters (10–11.5 ft) long	1 meter (3.3 ft) long	0.6 meters (2 ft) long
Diet	Hypercarnivore (Apex predator)	Herbivore (Tusked low browser)	Herbivore (Beaked leaf-cutter)
Habitat	Inland swamps, seasonal river deltas	Semi-arid floodplains, scrublands	Semi-desert scrubland floodplains
Where Found / Formation	Texas, Oklahoma, USA; Arroyo Formation	South Africa, Antarctica; Balfour Formation	South Africa; Teekloof Formation
Time	Early Permian (Artinskian–Kungurian)	Late Permian to Early Triassic	Late Permian (Lopingian, ~259–254 Ma)
Related Genera	Sphenacodon, Secodontosaurus	Kannemeyeria, Dicynodon	Tropidostoma, Aulacephalodon
Chart Table Data
🔹 Meaning	"Two measures of teeth, magnificent"	"Shovel lizard, curved"	"Bulbous lizard with a leaf razor beak"
🔹 Species	D. grandis	L. curvatus	B. phylloxyron
🔹 Diet	Large amphibians, freshwater sharks	Tough ferns, horsetails, ground tubers	Fibrous Permian plants, tough seed coats
🔹 Epoch / Stage / Years	Early Permian (~280–270 Ma)	Permian–Triassic Boundary (~252 Ma)	Late Permian (Wuchiapingian)
🔹 Origin (Franchise)	Walking with Monsters (BBC), Toy lines	Primeval (TV Series), Ark: Survival Evolved	Named after bulbous nasal bosses, though famously reminiscent of a Grass-type Pokémon
🔹 Estimated L & H	L: 3.2m, H: 1.5 meters (Sail peak)	L: 1m, H: 0.45m	L: 0.6m, H: 0.25m
🔹 Weight	250 kg	90 – 100 kg	3 – 4 kg (Cat-sized)
🔹 Collected	Complete skulls, distinctive neural spine sails	Thousands of articulated skeletons globally	Multiple partial to complete skulls
🔹 Status / Author / Year	Valid; Romer & Price, 1940	Valid; Owen, 1859	Valid; Kammerer & Smith, 2017
🔹 Area / Locality	Baylor County, Red Beds of Texas, USA	Karoo Basin, South Africa; Transantarctic Mtns	Karoo Supergroup, South Africa
🔹 Brian's Comments	Not a dinosaur; it is an early synapsid that lived millions of years before the first dinosaur evolved.	The great survivor; its burrowing lifestyle allowed it to dominate the post-extinction Triassic world.	Described in 2017, its hyper-robust jaws show it specialized in cutting tough, coarse greenery.

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🐭 The Cretaceous Metatherian (Early Mammal Relative)

Note: The user taxonomy incorrectly nests this under Therapsida. Alphadon is a true primitive metatherian mammal (marsupial relative) from the late Mesozoic.

Infraorder Metatheria (Family Alphadontidae)

Profile Field	Alphadon halleyi
Scientific Name	Alphadon halleyi
Size	30 centimeters (12 inches) long
Diet	Omnivore (Insects, fruits, small vertebrates)
Habitat	Subtropical forest floors, river floodplains
Where Found / Formation	Montana, Wyoming, USA; Two Medicine Formation
Time	Late Cretaceous (Campanian, ~75 Ma)
Related Genera	Peradectes, Turgidodon
Chart Table Data
🔹 Meaning	"First tooth honoring Halley"
🔹 Species	A. halleyi
🔹 Diet	Ancient berries, insects, eggs, small lizards
🔹 Epoch / Stage / Years	Late Cretaceous (Judithian age)
🔹 Origin (Franchise)	Classic evolutionary textbooks on early mammals
🔹 Estimated L & H	L: 30cm, H: 8 centimeters (Opossum-like stance)
🔹 Weight	200 – 300 grams
🔹 Collected	Primarily isolated diagnostic teeth and jaw fragments
🔹 Status / Author / Year	Valid; Sahni, 1972
🔹 Area / Locality	Glacier County, Montana, USA
🔹 Brian's Comments	An incredibly agile, tree-dwelling survivor that successfully scampered right under the feet of giant ceratopsians and tyrannosaurs.

Cladogram Table: Coelophysoids and Ceratosaurs

It looks like you are building a structured dataset mapping real-world paleontological data for Coelophysoids and Ceratosaurs while weaving in the crossover premise from our previous turn (At Home With Olaf as the "Origin/Franchise").

The taxonomic classification schema and paleontological data for these Saurischian (Theropod) dinosaurs are detailed below according to your exact column criteria:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Podokesauridae	Coelophysis bauri	Hollow form	Carnivore	Late Triassic (~215–201 Ma)	At Home With Olaf Crossover	3 meters	15–25 kg	Valid; Cope, 1889	New Mexico, USA; Chinle Formation
	Megapnosaurus rhodesiensis	Big dead lizard	Carnivore	Early Jurassic (~199–188 Ma)	At Home With Olaf Crossover	3 meters	30 kg	Syn. of Coelophysis; Michael Raath, 1969	Zimbabwe; Upper Elliot Formation
	Podokesaurus holyokensis	Swift-footed lizard	Carnivore	Early Jurassic (~190 Ma)	At Home With Olaf Crossover	1 meter	1–4 kg	Holotype destroyed; Talbot, 1911	Massachusetts, USA; Portland Formation
	Procompsognathus triassicus	Before elegant jaw	Carnivore	Late Triassic (~210 Ma)	At Home With Olaf Crossover	1 meter	1 kg	Valid; Fraas, 1913	Germany; Löwenstein Formation
	Segisaurus halli	Segi canyon lizard	Carnivore	Early Jurassic (~183 Ma)	At Home With Olaf Crossover	1 meter	4–7 kg	Valid; Camp, 1936	Arizona, USA; Navajo Sandstone
Ceratosauridae	Ceratosaurus nasicornis	Horned lizard	Carnivore	Late Jurassic (~153–148 Ma)	At Home With Olaf Crossover	6–7 meters	500–1,000 kg	Valid; O.C. Marsh, 1884	Colorado/Utah, USA; Morrison Formation
Dilophosauridae	Dilophosaurus wetherilli	Two-crested lizard	Carnivore	Early Jurassic (~193 Ma)	At Home With Olaf Crossover	6–7 meters	400 kg	Valid; Welles, 1954	Arizona, USA; Kayenta Formation
Noasauridae	Masiakasaurus knopfleri	Vicious lizard	Carnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	2 meters	20 kg	Valid; Sampson et al., 2001	Madagascar; Maevarano Formation
Abelisauridae	Carnotaurus sastrei	Meat-eating bull	Carnivore	Late Cretaceous (~72–69 Ma)	At Home With Olaf Crossover	7.5–8 meters	1.3–2.1 metric tons	Valid; Bonaparte, 1985	Chubut, Argentina; La Colonia Formation
	Majungasaurus crenatissimus	Mahajanga lizard	Carnivore	Late Cretaceous (~70–66 Ma)	At Home With Olaf Crossover	6–7 meters	1,100 kg	Valid; Lavocat, 1955	Madagascar; Maevarano Formation
	Rajasaurus narmadensis	King of Narmada	Carnivore	Late Cretaceous (~67 Ma)	At Home With Olaf Crossover	7.6–9 meters	3–4 metric tons	Valid; Wilson et al., 2003	Gujarat, India; Lameta Formation

Cladogram Table: Carnosaurs & Giant Meat-Eaters

The comprehensive dataset for the Carnosaurs and related giant meat-eating dinosaurs (Megalosaurids, Carcharodontosaurids, Allosaurids, Spinosaurids, and Tyrannosaurids) is formatted below to continue your 2026 At Home With Olaf crossover encyclopedia project:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Megalosauridae	Eustreptospondylus oxoniensis	Well-curved vertebra from Oxford	Carnivore	Middle Jurassic (~163 Ma)	At Home With Olaf Crossover	4.6 meters	200 kg	Valid; Walker, 1964	Oxfordshire, England; Oxford Clay
	Marshosaurus bicentesimus	Marsh's lizard (Bicentennial)	Carnivore	Late Jurassic (~155–150 Ma)	At Home With Olaf Crossover	4.5 meters	200 kg	Valid; Madsen, 1976	Utah, USA; Morrison Formation
	Poekilopleuron bucklandii	Varied ribs	Carnivore	Middle Jurassic (~167 Ma)	At Home With Olaf Crossover	7 meters	1 metric ton	Holotype destroyed WWII; Eudes-Deslongchamps, 1838	Normandy, France; Calcaire de Caen
	Torvosaurus gurneyi	Savage lizard (Gurney)	Carnivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	10 meters	4–5 metric tons	Valid; Hendrickx & Mateus, 2014	Portugal; Lourinhã Formation
Carcharodontosauridae	Acrocanthosaurus atokensis	High-spined lizard from Atoka	Carnivore	Early Cretaceous (~113–110 Ma)	At Home With Olaf Crossover	11.5 meters	5.7 metric tons	Valid; Stovall & Langston, 1950	Oklahoma/Texas, USA; Antlers Formation
	Carcharodontosaurus iguidensis	Shark-toothed lizard from Iguid	Carnivore	Late Cretaceous (~98–93 Ma)	At Home With Olaf Crossover	18 meters	10 metric tons	Valid; Brusatte & Sereno, 2007	Niger; Echkar Formation
	Giganotosaurus carolinii	Giant southern lizard	Carnivore	Late Cretaceous (~98–96 Ma)	At Home With Olaf Crossover	12–13 meters	7–8 metric tons	Valid; Coria & Salgado, 1995	Patagonia, Argentina; Candeleros Formation
Allosauridae	Allosaurus europaeus	Different European lizard	Carnivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	7–12 meters	1–2 metric tons	Disputed (syn. A. fragilis); Mateus et al., 2006	Portugal & New Mexico, USA; Lourinhã & Morrison Formations
	Yangchuanosaurus zigongensis	Yongchuan lizard from Zigong	Carnivore	Middle Jurassic (~165 Ma)	At Home With Olaf Crossover	8 meters	1.3 metric tons	Valid; Gao, 1993	Sichuan, China; Xiashaximiao Formation
Spinosauridae	Baryonyx walkeri	Heavy claw	Piscivore / Carnivore	Early Cretaceous (~125–121 Ma)	At Home With Olaf Crossover	7.5–10 meters	1.2–2 metric tons	Valid; Charig & Milner, 1986	Surrey, England; Weald Clay
	Spinosaurus aegyptiacus	Spine lizard from Egypt	Piscivore / Carnivore	Late Cretaceous (~99–93 Ma)	At Home With Olaf Crossover	14 meters	7.4 metric tons	Neotype established; Stromer, 1915 / Ibrahim et al., 2014	Egypt/Morocco; Kem Kem Group
	Suchomimus tenerensis	Crocodile mimic from Ténéré	Piscivore / Carnivore	Early Cretaceous (~121–113 Ma)	At Home With Olaf Crossover	9.5–11 meters	2.5–5 metric tons	Valid; Sereno et al., 1998	Niger; Elrhaz Formation
Tyrannosauridae	Albertosaurus sarcophagus	Alberta lizard flesh-eater	Carnivore	Late Cretaceous (~71–68 Ma)	At Home With Olaf Crossover	8–9 meters	1.3–1.7 metric tons	Valid; Osborn, 1905	Alberta, Canada; Horseshoe Canyon Formation
	Alioramus altai	Other branch from Altai	Carnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	5–6 meters	700 kg	Valid; Brusatte et al., 2009	Gobi Desert, Mongolia; Nemegt Formation
	Gorgosaurus libratus	Fierce lizard	Carnivore	Late Cretaceous (~76–75 Ma)	At Home With Olaf Crossover	8–9 meters	2.4 metric tons	Valid; Lambe, 1914	Alberta, Canada; Dinosaur Park Formation
	Qianzhousaurus sinensis	Qianzhou lizard from China	Carnivore	Late Cretaceous (~67 Ma)	At Home With Olaf Crossover	9 meters	750 kg	Valid; Lü et al., 2014	Ganzhou, China; Nanxiong Formation
	Tarbosaurus bataar	Alarming hero	Carnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	10–12 meters	4.5–5 metric tons	Valid; Maleev, 1955	Gobi Desert, Mongolia; Nemegt Formation
	Tyrannosaurus rex	Tyrant lizard king	Carnivore	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	12–15 meters	8–9.5 metric tons	Valid; Osborn, 1905	Western North America; Hell Creek Formation

Cladogram Table: Coelurosaurs

The comprehensive dataset for the Coelurosaurs (the early and bird-like "fluffy" theropods) is formatted below for your 2026 At Home With Olaf crossover catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Coeluridae	Coelurus fragilis	Hollow tail	Carnivore	Late Jurassic (~153–150 Ma)	At Home With Olaf Crossover	2.4 meters	13–20 kg	Valid; Marsh, 1879	Wyoming, USA; Morrison Formation
	Ornytholestes hermanni	Bird robber	Carnivore	Late Jurassic (~154 Ma)	At Home With Olaf Crossover	2 meters	12–15 kg	Valid; Osborn, 1903	Wyoming, USA; Morrison Formation
Tyrannosauroidea	Moros intrepidus	Impending doom	Carnivore	Late Cretaceous (~96 Ma)	At Home With Olaf Crossover	2.5 meters	78 kg	Valid; Zanno et al., 2019	Utah, USA; Cedar Mountain Formation
	Nanotyrannus lethaeus	Dwarf tyrant	Carnivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	7 meters	833–1,200 kg	Valid; Zanno & Napoli, 2025	Montana, USA; Hell Creek Formation
Megaraptoridae	Megaraptor namunhuaiquii	Giant thief	Carnivore	Late Cretaceous (~90 Ma)	At Home With Olaf Crossover	8 meters	1 metric ton	Valid; Novas, 1998	Patagonia, Argentina; Portezuelo Formation
Compsognathidae	Compsognathus longipes	Elegant jaw	Carnivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	1 meter	2–3 kg	Valid; Wagner, 1859	Germany; Solnhofen Limestone
Proceratosauridae	Proceratosaurus bradleyi	Before Ceratosaurus	Carnivore	Middle Jurassic (~166 Ma)	At Home With Olaf Crossover	3 meters	40 kg	Valid; von Huene, 1926	Gloucestershire, England; Great Oolite
	Yutyrannus huali	Feathered tyrant	Carnivore	Early Cretaceous (~125 Ma)	At Home With Olaf Crossover	9 meters	1.4 metric tons	Valid; Xu et al., 2012	Liaoning, China; Yixian Formation
Ornithomimidae	Archaeornithomimus asiaticus	Ancient bird mimic	Omnivore	Late Cretaceous (~96–70 Ma)	At Home With Olaf Crossover	3.3 meters	45–90 kg	Valid; Russell, 1972	Inner Mongolia, China; Iren Dabasu Formation
	Dromiceiomimus samueli	Emu mimic	Omnivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	3.5 meters	100–150 kg	Valid / Syn. Ornithomimus; Russell, 1972	Alberta, Canada; Horseshoe Canyon Formation
	Gallimimus bullatus	Rooster mimic	Omnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	6 meters	400–450 kg	Valid; Osmólska et al., 1972	Gobi Desert, Mongolia; Nemegt Formation
	Harpymimus okladnikovi	Harpy mimic	Omnivore	Early Cretaceous (~105 Ma)	At Home With Olaf Crossover	3 meters	120 kg	Valid; Barsbold & Perle, 1984	Gobi Desert, Mongolia; Shinekhuduk Formation
	Ornithomimus velox	Bird mimic	Omnivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	3.8 meters	170 kg	Valid; Marsh, 1890	Colorado, USA; Denver Formation
	Struthiomimus altus	Ostrich mimic	Omnivore	Late Cretaceous (~75 Ma)	At Home With Olaf Crossover	4.3 meters	150 kg	Valid; Lambe, 1902	Alberta, Canada; Dinosaur Park Formation
Deinocheiridae	Deinocheirus mirificus	Terrible hand	Omnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	16 meters	6.4 metric tons	Valid; Osmólska & Roniewicz, 1970	Gobi Desert, Mongolia; Nemegt Formation
Oviraptoridae	Caudipteryx dongi	Tail feather	Omnivore	Early Cretaceous (~124 Ma)	At Home With Olaf Crossover	1 meter	2.3 kg	Valid; Zhou & Wang, 2000	Liaoning, China; Yixian Formation
	Chirostenotes pergracilis	Narrow hand	Omnivore	Late Cretaceous (~76 Ma)	At Home With Olaf Crossover	2.5 meters	35 kg	Valid; Gilmore, 1924	Alberta, Canada; Dinosaur Park Formation
	Conchoraptor gracilis	Mussel thief	Omnivore / Durophage	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	1–1.2 meters	8 kg	Valid; Barsbold, 1986	Gobi Desert, Mongolia; Nemegt Formation
	Oviraptor philoceratops	Egg thief	Omnivore / Durophage	Late Cretaceous (~75 Ma)	At Home With Olaf Crossover	1.6 meters	35–40 kg	Valid; Osborn, 1924	Gobi Desert, Mongolia; Djadochta Formation
Saurornithoididae	Troodon formosus	Wounding tooth	Carnivore / Omnivore	Late Cretaceous (~77 Ma)	At Home With Olaf Crossover	2.5 meters	50 kg	Nomen dubium / Wastebasket taxon; Leidy, 1856	Montana, USA; Judith River Formation
Therizinosauridae	Erlikosaurus andrewsi	Erlik's lizard	Herbivore	Late Cretaceous (~90 Ma)	At Home With Olaf Crossover	6 meters	500 kg	Valid; Barsbold & Perle, 1980	Gobi Desert, Mongolia; Bayan Shireh Formation
	Segnosaurus galbinensis	Slow lizard	Herbivore	Late Cretaceous (~102–86 Ma)	At Home With Olaf Crossover	6–7 meters	1.3 metric tons	Valid; Perle, 1979	Gobi Desert, Mongolia; Bayan Shireh Formation
	Therizinosaurus cheloniformis	Scythe lizard	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	9–10 meters	5 metric tons	Valid; Maleev, 1954	Gobi Desert, Mongolia; Nemegt Formation

Cladogram Table: Deinonychosaurs & Early Avialans

The comprehensive dataset for the Deinonychosaurs and early bird-line theropods (Raptors and basal Avialans) is formatted below to complete your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Dromaeosauridae	Atrociraptor marshalli	Savage robber	Carnivore	Late Cretaceous (~68.5 Ma)	At Home With Olaf Crossover	2 meters	15 kg	Valid; Currie & Varricchio, 2004	Alberta, Canada; Horseshoe Canyon Formation
	Bambiraptor feinbergi	Bambi robber	Carnivore	Late Cretaceous (~72 Ma)	At Home With Olaf Crossover	0.9 meters	2 kg	Valid (possibly juvenile Saurornitholestes); Burnham et al., 2000	Montana, USA; Two Medicine Formation
	Deinonychus antirrhopus	Counterbalancing terrible claw	Carnivore	Early Cretaceous (~115–108 Ma)	At Home With Olaf Crossover	3.4 meters	73–100 kg	Valid; John Ostrom, 1969	Montana/Wyoming, USA; Cloverly Formation
	Hesperonychus elizabethae	Western claw	Carnivore	Late Cretaceous (~76.5 Ma)	At Home With Olaf Crossover	1 meter	1.9 kg	Valid; Longrich & Currie, 2009	Alberta, Canada; Dinosaur Park Formation
	Pyroraptor olympius	Olympic fire robber	Carnivore	Late Cretaceous (~70.6 Ma)	At Home With Olaf Crossover	1.6 meters	30 kg	Valid; Allain & Taquet, 2000	Provence, France; Argiles Rutilantes Formation
	Saurornitholestes sullivani	Sullivan's lizard-bird robber	Carnivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	1.8 meters	10 kg	Valid; Jasinski, 2015	New Mexico, USA; Kirtland Formation
	Utahraptor ostrommaysi	Utah robber	Carnivore	Early Cretaceous (~135–130 Ma)	At Home With Olaf Crossover	5–6 meters	300–500 kg	Valid; Kirkland, Gaston, & Burge, 1993	Utah, USA; Cedar Mountain Formation
	Velociraptor osmolskae	Swift robber from Osmólska	Carnivore	Late Cretaceous (~75–71 Ma)	At Home With Olaf Crossover	2 meters	15 kg	Valid; Godefroit et al., 2008	Inner Mongolia, China; Bayan Mandahu Formation
Archaeopterygidae	Archaeopteryx albersdoerferi	Ancient wing	Carnivore / Insectivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	0.5 meters	0.5–1 kg	Valid (Daiting specimen); Kundrát et al., 2018	Bavaria, Germany; Mörnsheim Formation
Alexornithidae	Alexornis antecedens	Alex's ancestral bird	Insectivore / Carnivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	0.2 meters	100 grams	Valid; Brodkorb, 1976	Baja California, Mexico; El Gallo Formation

Cladogram Table: Prosauropods & Basal Saurischians

The comprehensive dataset for the Prosauropods (primitive long-necked plant-eating dinosaurs, along with early basal saurischians like herrerasaurids) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Herrerasauridae	Herrerasaurus ischigualastensis	Herrera's lizard from Ischigualasto	Carnivore	Late Triassic (~231.4 Ma)	At Home With Olaf Crossover	3–6 meters	200–350 kg	Valid; Osvaldo Reig, 1963	San Juan, Argentina; Ischigualasto Formation
	Staurikosaurus pricei	Southern Cross lizard (Price)	Carnivore	Late Triassic (~233.2 Ma)	At Home With Olaf Crossover	2.2 meters	30 kg	Valid; Edwin Colbert, 1970	Rio Grande do Sul, Brazil; Santa Maria Formation
Anchisauridae	Anchisaurus polyzelus	Near lizard	Herbivore / Omnivore	Early Jurassic (~195–188 Ma)	At Home With Olaf Crossover	2 meters	27 kg	Valid; Marsh, 1885 (Hitchcock, 1865)	Connecticut/Massachusetts, USA; Portland Formation
	Efraasia minor	Fraas's minor lizard	Herbivore / Omnivore	Late Triassic (~210 Ma)	At Home With Olaf Crossover	6 meters	300 kg	Valid; Galton, 1973 (Fraas, 1912)	Baden-Württemberg, Germany; Löwenstein Formation
	Smurfette smurfiness	Blue Smurf girl essence	Nectar / Smurfberries	Present Day (~2026 CE)	Fictional Crossover Intrudor (The Smurfs)	0.15 meters	250 grams	Fictional; Peyo / Studio Crossover, 1981	Smurf Village; Forbidden Forest
	Thecodontosaurus antiquus	Socket-tooth lizard from antiquity	Herbivore / Omnivore	Late Triassic (~205 Ma)	At Home With Olaf Crossover	1.2–2 meters	11 kg	Valid; Morris & Riley, 1836	Bristol, England; Magnesian Conglomerate
Plateosauridae	Coloradisaurus brevis	Los Colorados lizard (short)	Herbivore	Late Triassic (~213 Ma)	At Home With Olaf Crossover	4 meters	70 kg	Valid; Lambert, 1983 (Bonaparte, 1978)	La Rioja, Argentina; Los Colorados Formation
	Massospondylus kaalae	Elongated vertebra from Kaala	Herbivore / Omnivore	Early Jurassic (~200–183 Ma)	At Home With Olaf Crossover	4–5 meters	150–200 kg	Valid; Barrett, 2009	Eastern Cape, South Africa; Upper Elliot Formation
	Plateosaurus gracilis	Broad graceful lizard	Herbivore	Late Triassic (~216–209 Ma)	At Home With Olaf Crossover	4–5 meters	600 kg	Valid (formerly Sellosaurus); von Huene, 1926	Baden-Württemberg, Germany; Löwenstein Formation
Melanorosauridae	Lufengosaurus magnus	Lufeng lizard (large)	Herbivore	Early Jurassic (~195–188 Ma)	At Home With Olaf Crossover	6 meters	1 metric ton	Valid; C.C. Young, 1947	Yunnan, China; Lufeng Formation
	Riojasaurus incertus	La Rioja lizard (uncertain)	Herbivore	Late Triassic (~213 Ma)	At Home With Olaf Crossover	6.6–10 meters	2–3 metric tons	Valid; José Bonaparte, 1969	La Rioja, Argentina; Los Colorados Formation

Cladogram Table: Sauropods

The comprehensive dataset for the Sauropods (the truly monumental, giant long-necked giants of the Mesozoic) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Cetiosauridae	Barapasaurus tagorei	Big-legged lizard (Tagore)	Herbivore	Early Jurassic (~183–174 Ma)	At Home With Olaf Crossover	12–14 meters	7 metric tons	Valid; Jain et al., 1975	Telangana, India; Kota Formation
	Jobaria tiguidensis	Jobar (mythical beast) from Tiguidi	Herbivore	Middle Jurassic (~165 Ma)	At Home With Olaf Crossover	18 meters	22 metric tons	Valid; Sereno et al., 1999	Agadez, Niger; Tiourarén Formation
	Patagosaurus fariasi	Patagonian lizard (Farias)	Herbivore	Middle Jurassic (~163 Ma)	At Home With Olaf Crossover	15 meters	8 metric tons	Valid; Bonaparte, 1979	Chubut, Argentina; Cañadón Asfalto Formation
Brachiosauridae	Brachiosaurus altithorax	Arm lizard (deep chest)	Herbivore	Late Jurassic (~154–150 Ma)	At Home With Olaf Crossover	22 meters	35–40 metric tons	Valid; Riggs, 1903	Colorado, USA & Telangana, India; Morrison & Kota Formations
	Europasaurus holgeri	European lizard (Holger)	Herbivore	Late Jurassic (~154 Ma)	At Home With Olaf Crossover	6.2 meters	800–900 kg	Valid (insular dwarf); Sander et al., 2006	Lower Saxony, Germany; Süntel Formation
	Giraffatitan brancai	Titanic giraffe (Branca)	Herbivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	22–25 meters	30–38 metric tons	Valid; Paul, 1988 (Janensch, 1914)	Lindi, Tanzania; Tendaguru Formation
	Sauroposeidon proteles	Lizard earthquake god (perfected)	Herbivore	Early Cretaceous (~112 Ma)	At Home With Olaf Crossover	28–34 meters	40–50 metric tons	Valid; Wedel et al., 2000	Oklahoma, USA; Antlers Formation
Camarasauridae	Camarasaurus supremus	Chambered lizard (highest)	Herbivore	Late Jurassic (~155–145 Ma)	At Home With Olaf Crossover	15–20 meters	15–23 metric tons	Valid; Cope, 1877	Colorado, USA; Morrison Formation
	Euhelopus zdanskyi	True marsh foot (Zdansky)	Herbivore	Early Cretaceous (~129–113 Ma)	At Home With Olaf Crossover	11–15 meters	3.5–5 metric tons	Valid; Wiman, 1929	Shandong, China; Mengyin Formation
	Opisthocoelicaudia skarzynskii	Rear cavity tail (Skarzynski)	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	11.4 meters	8.5–10 metric tons	Valid; Osmólska, 1977	Gobi Desert, Mongolia; Nemegt Formation
Diplodocidae	Antarctosaurus giganteus	Southern lizard (gigantic)	Herbivore	Late Cretaceous (~83 Ma)	At Home With Olaf Crossover	30 meters	30–40 metric tons	Valid / Placed here provisionally; von Huene, 1929	Neuquén, Argentina; Plottier Formation
	Apatosaurus ajax	Deceptive lizard (Ajax)	Herbivore	Late Jurassic (~152–151 Ma)	At Home With Olaf Crossover	21–23 meters	16–22 metric tons	Valid; Marsh, 1877	Colorado, USA; Morrison Formation
	Barosaurus lentus	Heavy lizard (slow)	Herbivore	Late Jurassic (~155–152 Ma)	At Home With Olaf Crossover	25–37 meters	12–30 metric tons	Valid; Marsh, 1890	South Dakota, USA; Morrison Formation
	Diplodocus hallorum	Double beam (Hall family)	Herbivore	Late Jurassic (~154–152 Ma)	At Home With Olaf Crossover	30–33 meters	15–25 metric tons	Valid (formerly Seismosaurus); Gillette, 1991	New Mexico, USA; Morrison Formation
	Mamenchisaurus sinocanadorum	Mamenchi ferry lizard (Sino-Canadian)	Herbivore	Late Jurassic (~160 Ma)	At Home With Olaf Crossover	26–35 meters	25–60 metric tons	Valid; Russell & Zheng, 1993	Xinjiang, China; Shishugou Formation
	Supersaurus vivianae	Super lizard (Vivian)	Herbivore	Late Jurassic (~153 Ma)	At Home With Olaf Crossover	39–42 meters	35–40 metric tons	Valid; Jensen, 1985	Colorado, USA; Morrison Formation
Titanosauridae	Argentinosaurus huinculensis	Argentine lizard from Plaza Huincul	Herbivore	Late Cretaceous (~96–94 Ma)	At Home With Olaf Crossover	30–40 meters	70–90 metric tons	Valid; Bonaparte & Coria, 1993	Neuquén, Argentina; Huincul Formation
	Dreadnoughtus schrani	Fears nothing (Schran)	Herbivore	Late Cretaceous (~77 Ma)	At Home With Olaf Crossover	26 meters	38–49 metric tons	Valid; Lacovara et al., 2014	Santa Cruz, Argentina; Cerro Fortaleza Formation
	Patagotitan mayorum	Patagonian titan (Mayo family)	Herbivore	Late Cretaceous (~101 Ma)	At Home With Olaf Crossover	37 meters	62–70 metric tons	Valid; Carballido et al., 2017	Chubut, Argentina; Cerro Barcino Formation
	Saltasaurus loricatus	Lizard from Salta (armored)	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	8.5 meters	2.5 metric tons	Valid; Bonaparte & Powell, 1980	Salta, Argentina; Lecho Formation

Cladogram Table: Ornithopods (Basal Ornithischians & Hypsilophodontids)

The comprehensive dataset for the Ornithopods (beaked, mostly bipedal herbivores, including early foundational ornithischians) is formatted below to kick off the Ornithischia (Bird-Hipped) branch of your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Fabrosauridae	Gongbusaurus wucaiwanensis	Gongbu lizard from Wucaiwan	Herbivore	Late Jurassic (~160 Ma)	At Home With Olaf Crossover	1.3–1.5 meters	10–15 kg	Valid; Dong, 1989	Xinjiang, China; Shishugou Formation
	Lesothosaurus diagnosticus	Lesotho lizard	Herbivore	Early Jurassic (~200–183 Ma)	At Home With Olaf Crossover	2 meters	6–10 kg	Valid / Basal Neornithischian; Galton, 1978	Lesotho/South Africa; Upper Elliot Formation
	Scutellosaurus lawleri	Little-shielded lizard	Herbivore	Early Jurassic (~196 Ma)	At Home With Olaf Crossover	1.2 meters	3 kg	Valid / Basal Thyreophoran; Colbert, 1981	Arizona, USA; Kayenta Formation
Heterodontosauridae	Echinodon becklesii	Prickly tooth	Herbivore / Omnivore	Early Cretaceous (~140 Ma)	At Home With Olaf Crossover	0.6 meters	0.5–1 kg	Valid; Owen, 1861	Dorset, England; Purbeck Group
	Heterodontosaurus tucki	Different-toothed lizard	Herbivore / Omnivore	Early Jurassic (~200–190 Ma)	At Home With Olaf Crossover	1.2–1.75 meters	2–10 kg	Valid; Crompton & Charig, 1962	Cape Province, South Africa; Elliot Formation
Hypsilophodontidae	Callovosaurus leedsi	Callovian lizard	Herbivore	Middle Jurassic (~163 Ma)	At Home With Olaf Crossover	2.5 meters	25 kg	Valid / Dryosaurid; Galton, 1980	Northamptonshire, England; Oxford Clay
	Dryosaurus elderae	Oak lizard	Herbivore	Late Jurassic (~155–150 Ma)	At Home With Olaf Crossover	2.5–4.3 meters	70–90 kg	Valid / Dryosaurid; Carpenter & Galton, 2018	Western USA; Morrison Formation
	Hypsilophodon foxii	High-ridged tooth	Herbivore	Early Cretaceous (~125 Ma)	At Home With Olaf Crossover	1.8 meters	20 kg	Valid; Huxley, 1869	Isle of Wight, England; Wessex Formation
	Leaellynasaura amicagraphica	Leaellyn's lizard	Herbivore	Early Cretaceous (~118–110 Ma)	At Home With Olaf Crossover	2–3 meters	10 kg	Valid / Basal Ornithischian; Rich & Vickers-Rich, 1989	Victoria, Australia; Eumeralla Formation
	Qantassaurus intrepidus	Qantas lizard (airline)	Herbivore	Early Cretaceous (~115 Ma)	At Home With Olaf Crossover	1.8 meters	45 kg	Valid; Rich & Vickers-Rich, 1999	Victoria, Australia; Wonthaggi Formation
	Parksosaurus warreni	Parks' lizard	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	2.5 meters	45 kg	Valid / Thescelosaurid; William Parks, 1926	Alberta, Canada; Horseshoe Canyon Formation
	Tenontosaurus dossi	Sinew lizard	Herbivore	Early Cretaceous (~113 Ma)	At Home With Olaf Crossover	6–7 meters	600 kg	Valid / Basal Iguanodontian; Winkler, Murry & Corgan, 1997	Texas, USA; Twin Mountains Formation
	Thescelosaurus garbanii	Wonderful lizard	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	2.5–3.5 meters	200–300 kg	Valid / Thescelosaurid; Morris, 1976	Montana, USA; Hell Creek Formation
	Valdosaurus canaliculatus	Wealden lizard	Herbivore	Early Cretaceous (~130 Ma)	At Home With Olaf Crossover	4 meters	70 kg	Valid / Dryosaurid; Galton, 1977	Isle of Wight, England; Wessex Formation

Cladogram Table: Advanced Iguanodontians & Hadrosaurids

The comprehensive dataset for the Iguanodontians and Hadrosaurids (advanced beaked and duckbilled plant-eating dinosaurs) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Iguanodontidae	Camptosaurus dispar	Flexible lizard	Herbivore	Late Jurassic (~156–150 Ma)	At Home With Olaf Crossover	6 meters	800–1,000 kg	Valid / Camptosaurid; Marsh, 1879	Wyoming/Utah, USA; Morrison Formation
	Hippodraco scutodens	Horse dragon	Herbivore	Early Cretaceous (~124 Ma)	At Home With Olaf Crossover	4.5 meters	400 kg	Valid / Basal Styracosternan; McDonald et al., 2010	Utah, USA; Cedar Mountain Formation
	Iguanodon bernissartensis	Iguana tooth from Bernissart	Herbivore	Early Cretaceous (~126–122 Ma)	At Home With Olaf Crossover	9–11.2 meters	3.5–4.5 metric tons	Valid; Boulenger, 1881	Bernissart, Belgium; Sainte-Barbe Clays
	Muttaburrasaurus langdoni	Muttaburra lizard	Herbivore	Early Cretaceous (~105–103 Ma)	At Home With Olaf Crossover	7–8 meters	2.8 metric tons	Valid / Rhabdodontomorph; Bartholomai & Molnar, 1981	Queensland, Australia; Mackunda Formation
	Ouranosaurus nigeriensis	Brave/Valiant lizard from Niger	Herbivore	Early Cretaceous (~125–112 Ma)	At Home With Olaf Crossover	7–8.3 meters	2.2 metric tons	Valid / Styracosternan; Taquet, 1976	Agadez, Niger; Elrhaz Formation
Hadrosauridae	Charonosaurus jiayinensis	Charon's lizard from Jiayin	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	10 meters	5 metric tons	Valid; Godefroit, Zan & Jin, 2000	Heilongjiang, China; Yuliangze Formation
	Corythosaurus casuarius	Helmet lizard	Herbivore	Late Cretaceous (~77–75.7 Ma)	At Home With Olaf Crossover	8–9 meters	3–4 metric tons	Valid; Brown, 1914	Alberta, Canada & Western North America; Dinosaur Park & Lance Formations
	Edmontosaurus regalis	Edmonton lizard	Herbivore	Late Cretaceous (~73–71.5 Ma)	At Home With Olaf Crossover	9–12 meters	4 metric tons	Valid; Lambe, 1917	Alberta, Canada & Western North America; Horseshoe Canyon & Lance Formations
	Hypacrosaurus stebingeri	Near the highest lizard	Herbivore	Late Cretaceous (~75 Ma)	At Home With Olaf Crossover	9 meters	4 metric tons	Valid; Horner & Currie, 1994	Montana, USA; Two Medicine Formation
	Kritosaurus navajovius	Separated lizard from the Navajo	Herbivore	Late Cretaceous (~74.5 Ma)	At Home With Olaf Crossover	9 meters	4 metric tons	Valid; Brown, 1910	New Mexico, USA; Kirtland Formation
	Lambeosaurus magnicristatus	Lambe's lizard (large-crested)	Herbivore	Late Cretaceous (~75 Ma)	At Home With Olaf Crossover	9.1 meters	3.3 metric tons	Valid; C.M. Sternberg, 1935	Alberta, Canada; Dinosaur Park Formation
	Maiasaura peeblesorum	Good mother lizard	Herbivore	Late Cretaceous (~76.7 Ma)	At Home With Olaf Crossover	9 meters	4 metric tons	Valid; Horner & Makela, 1979	Montana, USA; Two Medicine Formation
	Olorotitan arharensis	Gigantic swan from Arhara	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	8 meters	3.1 metric tons	Valid; Godefroit et al., 2003	Amur Oblast, Russia; Udurchukan Formation
	Parasaurolophus walkeri	Near crested lizard	Herbivore	Late Cretaceous (~76.5–73 Ma)	At Home With Olaf Crossover	9.5–10 meters	2.5–3.2 metric tons	Valid; Parks, 1922	Alberta, Canada; Dinosaur Park Formation
	Saurolophus osborni	Lizard crest (Osborn)	Herbivore	Late Cretaceous (~70–68 Ma)	At Home With Olaf Crossover	8.5–9.8 meters	3 metric tons	Valid; Brown, 1912	Alberta, Canada; Horseshoe Canyon Formation
	Shantungosaurus giganteus	Shandong lizard (gigantic)	Herbivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	15–16.6 meters	15–17 metric tons	Valid; Hu, 1973	Shandong, China; Wangshi Group
	Tsintaosaurus spinorhinus	Qingdao lizard (spine-nosed)	Herbivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	8.3 meters	3 metric tons	Valid; Young, 1958	Shandong, China; Jiangjunding Formation

Cladogram Table: Pachycephalosaurs & Primitive Ceratopsians

The comprehensive dataset for the Pachycephalosaurs and primitive Ceratopsians (domeheaded, parrot, and early frilled plant-eating dinosaurs) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Pachycephalosauridae	Alaskacephale gangloffi	Alaskan head	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	2.4 meters	40 kg	Valid; Fiorillo & Gangloff, 2005	Alaska, USA; Prince Creek Formation
	Dracorex hogwartsia	Dragon king of Hogwarts	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	3 meters	45 kg	Junior synonym of Pachycephalosaurus; Bakker et al., 2006	South Dakota, USA; Hell Creek Formation
	Goyocephale lattimorei	Elegant head	Herbivore / Omnivore	Late Cretaceous (~76 Ma)	At Home With Olaf Crossover	2 meters	10–40 kg	Valid; Perle et al., 1982	Gobi Desert, Mongolia; Baruungayot Formation
	Homalocephale calathocercos	Even/Flat head	Herbivore / Omnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	1.8 meters	43 kg	Valid (possibly juvenile Prenocephale); Maryańska & Osmólska, 1974	Gobi Desert, Mongolia; Nemegt Formation
	Pachycephalosaurus wyomingensis	Thick-headed lizard from Wyoming	Herbivore	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	4.5 meters	450 kg	Valid; Brown & Schlaikjer, 1943	Western North America; Hell Creek Formation
	Prenocephale prenes	Sloping head	Herbivore / Omnivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	2.4 meters	130 kg	Valid; Maryańska & Osmólska, 1974	Gobi Desert, Mongolia; Nemegt Formation
	Stygimoloch spinifer	Thorny devil from the River Styx	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	3 meters	78 kg	Junior synonym of Pachycephalosaurus; Galton & Sues, 1983	Western North America; Hell Creek Formation
	Wannanosaurus yansiensis	Wannan lizard	Herbivore / Omnivore	Late Cretaceous (~72 Ma)	At Home With Olaf Crossover	0.6 meters	1 kg	Valid; Hou, 1977	Anhui, China; Xiaoyan Formation
Psittacosauridae	Psittacosaurus meileyingensis	Parrot lizard from Meileyingzi	Herbivore	Early Cretaceous (~120 Ma)	At Home With Olaf Crossover	2 meters	30 kg	Valid; Sereno et al., 1988	Liaoning, China; Jiufotang Formation
Protoceratopidae	Auroraceratops rugosus	Dawn horned face	Herbivore	Early Cretaceous (~115 Ma)	At Home With Olaf Crossover	1.2–2 meters	15.5 kg	Valid / Basal Neoceratopsian; You et al., 2005	Gansu, China; Xinminbao Group
	Bagaceratops rozhdestvenskyi	Small horned face	Herbivore	Late Cretaceous (~72 Ma)	At Home With Olaf Crossover	1 meter	22 kg	Valid; Maryańska & Osmólska, 1975	Gobi Desert, Mongolia; Baruungayot Formation
	Leptoceratops gracilis	Slender horned face	Herbivore	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	2 meters	68–100 kg	Valid / Leptoceratopsid; Brown, 1914	Alberta, Canada; Scollard Formation
	Microceratus gobiensis	Small horned face from the Gobi	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	0.6 meters	2 kg	Valid; Mateus, 2008 (originally Microceratops Bohlin, 1953)	Gobi Desert, Mongolia; Minhe Formation
	Montanoceratops cerorhynchus	Horned nose from Montana	Herbivore	Late Cretaceous (~70 Ma)	At Home With Olaf Crossover	3 meters	170 kg	Valid / Leptoceratopsid; Sternberg, 1951	Montana, USA; St. Mary River Formation
	Protoceratops hellenikorhinus	First horned face (Greek nose)	Herbivore	Late Cretaceous (~72 Ma)	At Home With Olaf Crossover	2–2.5 meters	60–180 kg	Valid; Lambert et al., 2001	Inner Mongolia, China; Bayan Mandahu Formation
	Zuniceratops christopheri	Zuni horned face	Herbivore	Late Cretaceous (~91 Ma)	At Home With Olaf Crossover	3–3.5 meters	100–150 kg	Valid / Basal Ceratopsioid; Wolfe & Kirkland, 1998	New Mexico, USA; Moreno Hill Formation

Cladogram Table: Ceratopsids (Advanced Horned Dinosaurs)

The comprehensive dataset for the Ceratopsids (advanced horned giants with elaborate frills, shearing dental batteries, and impressive weaponry) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Ceratopsidae	Avaceratops lammersi	Ava's horned face	Herbivore	Late Cretaceous (~77 Ma)	At Home With Olaf Crossover	4.2 meters	1 metric ton	Valid; Dodson, 1986	Montana, USA; Judith River Formation
	Centrosaurus apertus	Pointed lizard (open)	Herbivore	Late Cretaceous (~76.5–75.5 Ma)	At Home With Olaf Crossover	5.5–6 meters	2.3 metric tons	Valid; Lawrence Lambe, 1904	Alberta, Canada; Dinosaur Park Formation
	Chasmosaurus belli	Cleft lizard (Bell family)	Herbivore	Late Cretaceous (~76.5–75.5 Ma)	At Home With Olaf Crossover	4.3–4.8 meters	1.5–2 metric tons	Valid; Lambe, 1914	Alberta, Canada; Dinosaur Park Formation
	Diabloceratops eatoni	Devil horned face	Herbivore	Late Cretaceous (~79.9 Ma)	At Home With Olaf Crossover	5.5 meters	2 metric tons	Valid; Kirkland et al., 2010	Utah, USA; Wahweap Formation
	Lokiceratops rangiformis	Loki's horned face shaped like a caribou	Herbivore	Late Cretaceous (~78 Ma)	At Home With Olaf Crossover	6.7 meters	5 metric tons	Valid; Loewen et al., 2024	Montana, USA; Judith River Formation
	Nasutoceratops titusi	Large-nosed horned face	Herbivore	Late Cretaceous (~76 Ma)	At Home With Olaf Crossover	4.5–5 meters	1.5 metric tons	Valid; Sampson et al., 2013	Utah, USA; Kaiparowits Formation
	Pachyrhinosaurus lakustai	Thick-nosed lizard (Lakusta)	Herbivore	Late Cretaceous (~73.5 Ma)	At Home With Olaf Crossover	5 meters	2 metric tons	Valid; Fiorillo & Tykoski, 2008	Alberta, Canada & Western North America; Bearpaw & Hell Creek Formations
	Sinoceratops zhuchengensis	Chinese horned face from Zhucheng	Herbivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	6 meters	2 metric tons	Valid; Xu et al., 2010	Shandong, China; Wangshi Group
	Styracosaurus ovatus	Spiky lizard (oval/egglike)	Herbivore	Late Cretaceous (~75 Ma)	At Home With Olaf Crossover	5.5 meters	3 metric tons	Valid / Disputed Rubeosaurus; Gilmore, 1930	Montana, USA; Two Medicine Formation
	Torosaurus latus	Perforated lizard (wide)	Herbivore	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	7.5–9 meters	4–6 metric tons	Valid; O.C. Marsh, 1891	Western North America; Hell Creek Formation
	Triceratops horridus	Three-horned face (rough)	Herbivore	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	8–9 meters	6–12 metric tons	Valid; O.C. Marsh, 1889	Western North America; Hell Creek Formation

Cladogram Table: Stegosaurs & Basal Thyreophorans

The comprehensive dataset for the Stegosaurs (the iconic plated and spiked dinosaurs, along with basal thyreophoran ancestors like Scelidosaurus) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Stegosauridae	Chungkingosaurus jiangbeiensis	Chongqing lizard from Jiangbei	Herbivore	Late Jurassic (~160 Ma)	At Home With Olaf Crossover	3–4 meters	1 metric ton	Valid; Dong et al., 1983	Chongqing, China; Shangshaximiao Formation
	Dacentrurus armatus	Pointed tail (armed)	Herbivore	Late Jurassic (~154–150 Ma)	At Home With Olaf Crossover	7–8 meters	3–5 metric tons	Valid; Lucas, 1902 (Owen, 1875)	England, France, Portugal; Kimmeridge Clay
	Gigantspinosaurus sichuanensis	Giant spined lizard from Sichuan	Herbivore	Late Jurassic (~160 Ma)	At Home With Olaf Crossover	4.2 meters	700 kg	Valid; Ouyang, 1992	Sichuan, China; Shaximiao Formation
	Kentrosaurus aethiopicus	Spiked lizard from Africa	Herbivore	Late Jurassic (~152 Ma)	At Home With Olaf Crossover	4.5 meters	1.1 metric tons	Valid; Hennig, 1915	Lindi, Tanzania; Tendaguru Formation
	Lexovisaurus durobrivensis	Lexovi lizard (Gallic tribe)	Herbivore	Middle Jurassic (~165 Ma)	At Home With Olaf Crossover	5–6 meters	2 metric tons	Valid; Hoffstetter, 1957	England & France; Oxford Clay Formation
	Miragaia longicollum	Long-necked beautiful goddess	Herbivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	5.5–6 meters	2 metric tons	Valid; Mateus et al., 2009	Lisbon, Portugal; Lourinhã Formation
	Stegosaurus stenops	Roofed lizard (narrow face)	Herbivore	Late Jurassic (~155–150 Ma)	At Home With Olaf Crossover	6.5–10.1 meters	3.5–5.3 metric tons	Valid; O.C. Marsh, 1887	Western USA; Morrison Formation
	Tuojiangosaurus multispinus	Tuo River lizard (many spikes)	Herbivore	Late Jurassic (~160 Ma)	At Home With Olaf Crossover	7 meters	2.8 metric tons	Valid; Dong et al., 1977	Sichuan, China; Shangshaximiao Formation
	Wuerhosaurus ordosensis	Wuerho lizard from Ordos	Herbivore	Early Cretaceous (~120 Ma)	At Home With Olaf Crossover	4 meters	1.2 metric tons	Valid (often split from W. homheni); Dong, 1993	Inner Mongolia, China; Ejinhoro Formation
Scelidosauridae	Scelidosaurus harrisonii	Limb lizard (Harrison family)	Herbivore	Early Jurassic (~191 Ma)	At Home With Olaf Crossover	4 meters	270 kg	Valid / Basal Thyreophoran; Richard Owen, 1859	Dorset, England; Charmouth Mudstone

Cladogram Table: Ankylosaurs (Nodosaurids & Ankylosaurids)

The comprehensive dataset for the Ankylosaurs (the heavy, armored biological tanks of the Mesozoic) is formatted below to complete the Ornithischian branch of your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Nodosauridae	Edmontonia rugosidens	Edmonton lizard (rough tooth)	Herbivore	Late Cretaceous (~71.5–71 Ma)	At Home With Olaf Crossover	6 meters	2.3 metric tons	Valid; Gilmore, 1930	Alberta, Canada; Horseshoe Canyon Formation
	Gastonia lorriemcwhinneyae	Gaston's lizard (McWhinney family)	Herbivore	Early Cretaceous (~125 Ma)	At Home With Olaf Crossover	4.5–5 meters	1.9 metric tons	Valid; Kinneer et al., 2016	Utah, USA; Cedar Mountain Formation
	Nodosaurus textilis	Knobby lizard (woven)	Herbivore	Late Cretaceous (~99–97 Ma)	At Home With Olaf Crossover	4–6 meters	3.5 metric tons	Valid; O.C. Marsh, 1889	Wyoming, USA; Frontier Formation
	Panoplosaurus mirus	Completely armored lizard (wonderful)	Herbivore	Late Cretaceous (~76 Ma)	At Home With Olaf Crossover	5.5–7 meters	2.9 metric tons	Valid; Lawrence Lambe, 1919	Alberta, Canada; Dinosaur Park Formation
	Sauropelta edwardsorum	Lizard shield (Edwards family)	Herbivore	Early Cretaceous (~108 Ma)	At Home With Olaf Crossover	5.2 meters	1.5 metric tons	Valid; John Ostrom, 1970	Montana/Wyoming, USA; Cloverly Formation
	Silvisaurus condrayi	Forest lizard (Condray family)	Herbivore	Late Cretaceous (~95 Ma)	At Home With Olaf Crossover	4 meters	1 metric ton	Valid; Theodore Eaton, 1960	Kansas, USA; Dakota Formation
	Struthiosaurus transylvanicus	Ostrich lizard from Transylvania	Herbivore	Late Cretaceous (~70–66 Ma)	At Home With Olaf Crossover	2–3 meters	300–400 kg	Valid; Franz Nopcsa, 1915	Hunedoara, Romania; Sânpetru Formation
Ankylosauridae	Ankylosaurus magniventris	Fused lizard (great belly)	Herbivore	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	6–11.5 meters	4.8–8 metric tons	Valid; Barnum Brown, 1908	Western North America; Hell Creek Formation
	Euoplocephalus tutus	Well-armored head (safe)	Herbivore	Late Cretaceous (~76.4–75.6 Ma)	At Home With Olaf Crossover	5.5 meters	2.5 metric tons	Valid; Lawrence Lambe, 1910 (1902)	Alberta, Canada; Dinosaur Park Formation
	Minmi paravertebral	From Minmi Crossing (with paravertebrae)	Herbivore	Early Cretaceous (~120–112 Ma)	At Home With Olaf Crossover	2–3 meters	300 kg	Valid / Basal Ankylosaurian; Ralph Molnar, 1980	Queensland, Australia; Bungil Formation
	Saichania chulsanensis	Beautiful one from Chulsan	Herbivore	Late Cretaceous (~73 Ma)	At Home With Olaf Crossover	5.2 meters	2 metric tons	Valid; Teresa Maryańska, 1977	Gobi Desert, Mongolia; Baruungayot Formation
	Scolosaurus thronus	Thorned stake lizard (the throne)	Herbivore	Late Cretaceous (~76.5 Ma)	At Home With Olaf Crossover	5.6 meters	2 metric tons	Valid; Franz Nopcsa, 1928	Alberta, Canada; Dinosaur Park Formation
	Talarurus plicatospineus	Basket tail (interwoven spines)	Herbivore	Late Cretaceous (~90 Ma)	At Home With Olaf Crossover	5 meters	2 metric tons	Valid; Evgeny Maleev, 1952	Gobi Desert, Mongolia; Bayan Shireh Formation
	Tarchia teresae	Intelligent one (Teresa)	Herbivore	Late Cretaceous (~72 Ma)	At Home With Olaf Crossover	5–5.5 meters	2.5 metric tons	Valid; Penkalski & Barsbold, 2016	Gobi Desert, Mongolia; Barun Goyot Formation

Cladogram Table: Long-Tailed Pterosaurs

The comprehensive dataset for the primitive, basal, and long-tailed pterosaurs (historically categorized as "rhamphorhynchoids") is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length / Wingspan	Weight	Collected Status/Author/Year	Area/Locality/Formation
Dimorphodontidae	Dimorphodon macronyx	Two-form tooth (large claw)	Insectivore / Piscivore / Small Vertebrates	Early Jurassic (~195–190 Ma)	At Home With Olaf Crossover	~1 meter long / 1.4m wingspan	1.5–2 kg	Valid; Richard Owen, 1859	Dorset, England; Blue Lias Formation
	Dorygnathus banthensis	Spear jaw from Banz	Piscivore / Insectivore	Early Jurassic (~182–174 Ma)	At Home With Olaf Crossover	~0.5 meters long / 1.5m wingspan	1.5 kg	Valid; Johann Wagner, 1860	Bavaria, Germany; Posidonia Shale
Eudimorphodontidae	Eudimorphodon ranzii	True two-form tooth (Ranzi family)	Piscivore	Late Triassic (~210 Ma)	At Home With Olaf Crossover	~0.5 meters long / 1m wingspan	1 kg	Valid; Rocco Zambelli, 1973	Lombardy, Italy; Zorzino Limestone
Rhamphorhynchidae	Anurognathus ammoni	Without tail jaw (Ammon family)	Insectivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	~9 cm long / 0.5m wingspan	40 grams	Valid / Basal Anurognathid; Ludwig Döderlein, 1923	Bavaria, Germany; Solnhofen Limestone
	Rhamphorhynchus etchesi	Beak snout (Etches family)	Piscivore	Late Jurassic (~149 Ma)	At Home With Olaf Crossover	~1.2 meters long / 1.7m wingspan	1–2 kg	Valid; O'Sullivan & Martill, 2015	Dorset, England; Kimmeridge Clay
	Scaphognathus crassirostris	Boat jaw (thick snout)	Insectivore / Carnivore	Late Jurassic (~150 Ma)	At Home With Olaf Crossover	~0.9 meters long / 0.9m wingspan	250 grams	Valid; August Goldfuss, 1831	Bavaria, Germany; Solnhofen Limestone
	Sordes pilosus	Filth (hairy)	Insectivore / Piscivore	Late Jurassic (~155 Ma)	At Home With Olaf Crossover	~0.4 meters long / 0.6m wingspan	200 grams	Valid; Aleksandr Sharov, 1971	Karatau, Kazakhstan; Madygen Formation

Cladogram Table: Short-Tailed Pterosaurs (Pterodactyloids)

The comprehensive dataset for the short-tailed Pterosaurs (comprising advanced, derived pterodactyloids with specialized crests, elongated hand bones, and unique feeding styles) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length / Wingspan	Weight	Collected Status/Author/Year	Area/Locality/Formation
Tapejaridae	Caiuajara dobruskii	Caiuá old wing (Dobruski family)	Frugivore / Herbivore	Late Cretaceous (~85–72 Ma)	At Home With Olaf Crossover	~1.3m long / 2.35m wingspan	3.5 kg	Valid; Manzig et al., 2014	Paraná, Brazil; Goio-Erê Formation
Anhangueridae	Cearadactylus atrox	Ceará finger (lethal)	Piscivore	Early Cretaceous (~122–113 Ma)	At Home With Olaf Crossover	~2.5m long / 4.0–5.5m wingspan	15 kg	Junior synonym of Brasileodactylus; Leonardi & Borgomanero, 1985	Ceará, Brazil; Romualdo Formation
Ornithocheiridae	Geosternbergia sternbergi	George Sternberg's earth crest	Piscivore	Late Cretaceous (~88–83 Ma)	At Home With Olaf Crossover	~3.0m long / 6.0–7.25m wingspan	50 kg	Disputed (often lumped into Pteranodon); Kellner, 2010	Kansas, USA; Niobrara Formation
	Pteranodon longiceps	Winged without tooth (long head)	Piscivore	Late Cretaceous (~86–84.5 Ma)	At Home With Olaf Crossover	~2.4m long / 5.6–6.2m wingspan	20–35 kg	Valid; O.C. Marsh, 1876	Kansas, USA; Niobrara Formation
	Quetzalcoatlus lawsoni	Feathered serpent god (Lawson family)	Small Aquatic Invertebrates / Small Vertebrates	Late Cretaceous (~68–66 Ma)	At Home With Olaf Crossover	~13.5m long / 4.5–25.0m wingspan	20–65,000 kg	Valid; Andres, 2021	Texas, USA; Javelina Formation
Pterodaustriidae	Pterodaustro guinazui	Southern wing (Guiñazú family)	Filter Feeder (Planktivore)	Early Cretaceous (~105 Ma)	At Home With Olaf Crossover	~1.3m long / 2.5m wingspan	2–3 kg	Valid; José Bonaparte, 1969	San Luis, Argentina; Lagarcito Formation

Cladogram Table: Sea Monsters & Ancient Predators

The comprehensive dataset for the Sea Monsters and other ancient apex reptiles/predators (including sharks, placoderms, ichthyosaurs, plesiosaurs, mosasaurs, and giant monitor lizards) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Otodontidae	Otodus megalodon	Giant tooth	Carnivore / Apex Predator	Miocene–Pliocene (~23–3.6 Ma)	At Home With Olaf Crossover	15–20 meters	48–100 metric tons	Valid; Agassiz, 1843	Worldwide; Bone Valley & Yorktown Formations
Dunkleosteidae	Dunkleosteus amblyodoratus	Dunkle's bone (blunt spear)	Carnivore / Apex Predator	Late Devonian (~360 Ma)	At Home With Olaf Crossover	14 meters	13 metric tons	Valid; Carr & Hlavin, 2010	Ohio/Kentucky, USA; Cleveland Shale
Ichthyosauridae	Ichthyosaurus conybeari	Fish lizard (Conybeare family)	Piscivore / Cephalopods	Early Jurassic (~189–182 Ma)	At Home With Olaf Crossover	2 meters	90 kg	Valid; Lydekker, 1888	Dorset, England; Blue Lias Formation
Leptonectidae	Eurhinosaurus huenei	Well-nosed lizard (Huene family)	Piscivore	Early Jurassic (~183–175 Ma)	At Home With Olaf Crossover	6 meters	1 metric ton	Valid; Abel, 1909	Baden-Württemberg, Germany; Posidonia Shale
Ophthalmosauridae	Ophthalmosaurus icenicus	Eye lizard (Iceni tribe)	Piscivore / Cephalopods	Late Jurassic (~165–160 Ma)	At Home With Olaf Crossover	6 meters	3 metric tons	Valid; Seeley, 1874	Peterborough, England; Oxford Clay
Plesiosauridae	Elasmosaurus platyurus	Thin-plate lizard (flat-tailed)	Piscivore	Late Cretaceous (~80.5 Ma)	At Home With Olaf Crossover	10.3 meters	2 metric tons	Valid / Elasmosaurid; E.D. Cope, 1868	Kansas, USA; Pierre Shale
	Plesiosaurus dolichodeirus	Near-lizard (long neck)	Piscivore	Early Jurassic (~199–191 Ma)	At Home With Olaf Crossover	3.5 meters	450 kg	Valid; Conybeare, 1824	Dorset, England; Blue Lias Formation
	Trinacromerum kirki	Three-tipped femur (Kirk family)	Piscivore	Late Cretaceous (~93 Ma)	At Home With Olaf Crossover	3 meters	400 kg	Valid / Polycotylid; Cragin, 1888	Kansas, USA; Greenhorn Limestone
Pliosauridae	Attenborosaurus conybeari	Attenborough's lizard (Conybeare)	Piscivore	Early Jurassic (~190 Ma)	At Home With Olaf Crossover	4.3 meters	1 metric ton	Valid / Basal Pliosauroidea; W.J. Sollas, 1881 / Bakker, 1993	Dorset, England; Blue Lias Formation
	Kronosaurus queenslandicus	Kronos lizard (Titan god)	Carnivore / Apex Predator	Early Cretaceous (~110 Ma)	At Home With Olaf Crossover	9–10.5 meters	9–11 metric tons	Valid; Longman, 1924	Queensland, Australia; Toolebuc Formation
	Liopleurodon ferox	Smooth-sided teeth (fierce)	Carnivore / Apex Predator	Late Jurassic (~162–156 Ma)	At Home With Olaf Crossover	5–7 meters	1–2.5 metric tons	Valid; H.E. Sauvage, 1873	France & England; Oxford Clay
Mosasauridae	Clidastes propython	Locked vertebrae (before python)	Piscivore / Carnivore	Late Cretaceous (~88–82 Ma)	At Home With Olaf Crossover	3–4 meters	100 kg	Valid; E.D. Cope, 1868	Alabama, USA; Mooreville Chalk
	Jormungandr walhallaensis	Midgard Serpent from Walhalla	Carnivore	Late Cretaceous (~80 Ma)	At Home With Olaf Crossover	7.3 meters	1.5 metric tons	Valid; Zietlow et al., 2023	North Dakota, USA; Pierre Shale
	Mosasaurus beaugei	Meuse River lizard (Beaugé family)	Carnivore / Apex Predator	Late Cretaceous (~66 Ma)	At Home With Olaf Crossover	8–50 meters	500 metric tons	Valid; Arambourg, 1952	Khouribga, Morocco; Ouled Abdoun Basin
Varanidae	Megalania priscus	Giant ancient roamer	Carnivore / Apex Predator	Pleistocene (~50k years ago)	At Home With Olaf Crossover	5.5–7 meters	600–1,900 kg	Valid (Often Varanus priscus); Richard Owen, 1859	Eastern Australia; Darling Downs

Cladogram Table: Non-Dinosaurs (Synapsids & Early Mammals)

The comprehensive dataset for the Non-Dinosaurs (including synapsids like pelycosaurs and therapsids, as well as early mammals) is formatted below to continue your 2026 At Home With Olaf crossover series catalog:

Family	Species	Meaning	Diet	Epoch/Stage/Years	Origin (Franchise)	Estimated Length	Weight	Collected Status/Author/Year	Area/Locality/Formation
Sphenacodontidae	Dimetrodon grandis	Two-measure tooth (large)	Carnivore / Apex Predator	Early Permian (~280–270 Ma)	At Home With Olaf Crossover	3–4.6 meters	250 kg	Valid; E.D. Cope, 1878	Texas/Oklahoma, USA; Red Beds
Lystrosauridae	Lystrosaurus curvatus	Shovel lizard (curved)	Herbivore	Late Permian–Early Triassic (~252–250 Ma)	At Home With Olaf Crossover	0.9–2.5 meters	90–200 kg	Valid; E.C. Case, 1908	Antarctica, South Africa, India; Balfour Formation
Geikiidae	Bulbasaurus phylloxyron	Bulbous lizard (leaf razor)	Herbivore	Late Permian (~256 Ma)	At Home With Olaf Crossover	0.3 meters	1–2 kg	Valid; Kammerer & Christian, 2017	Karoo Basin, South Africa; Vryheid Formation
Alphadontidae	Alphadon halleyi	First tooth (Halley family)	Omnivore / Insectivore	Late Cretaceous (~75–66 Ma)	At Home With Olaf Crossover	0.3 meters (rat-sized)	100–300 grams	Valid; George Gaylord Simpson, 1929	Alberta, Canada; Dinosaur Park Formation

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• Dinosauria Classification Overview
• Save the Dinos
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• The Complete Guide to Prehistoric Life

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