BIO DINOSAURS SIZE

Sinopsia

It looks like you've mashed together two completely different pieces of media!

Here is the breakdown of the actual, separate works you've combined:

1. Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages is a highly acclaimed, 432-page book written by real-world paleontologist Dr. Thomas R. Holtz Jr.. Published in 2007 by Random House, it is often nicknamed "The Dinosaur Bible" and features stunning, museum-quality illustrations by renowned paleoartist Luis V. Rey.
2. At Home With Olaf is a Disney animated short-film series created by Hyrum Osmond. Released in 2020 during the COVID-19 pandemic, it features Josh Gad reprising his voice role as the beloved snowman from Frozen.

While a crossover where Olaf teaches us about the Mesozoic Era sounds incredibly entertaining, the encyclopedia is strictly a scientific guide to prehistoric life, and the shorts are strictly comedic Disney vignettes.

Are you looking for information on where to buy Dr. Holtz's dinosaur encyclopedia, or were you looking for a list of episodes from the At Home With Olaf series?

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

Dinosaur and Prehistoric Reptiles

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Theropoda (Part 1)

The following dataset encompasses the primitive Herrerasauridae and the diverse Ceratosauria branches of bipedal theropods. This chart integrates the key physical metrics, geographic origins, and geological formations for these early and specialized meat-eaters.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Herrerasaurus ischigualastensis	Holotype (PVL 2566)	Late Triassic (Carnian)	~231.4 Ma	1.1 – 1.3 m	3.0 – 6.0 m	210 – 350 kg	Ischigualasto Formation, San Juan, Argentina
Staurikosaurus pricei	Holotype (MCZ 1669)	Late Triassic (Carnian)	~233.2 Ma	0.8 m	2.2 – 2.5 m	30 kg	Santa Maria Formation, Rio Grande do Sul, Brazil
Abelisaurus comahuensis	Holotype (MPCA 11098)	Late Cretaceous (Campanian)	~83.6–72.1 Ma	2.0 – 2.4 m	7.4 m	1.4 – 3.0 tonnes	Anacleto Formation, Río Negro, Argentina
Carnotaurus sastrei	Holotype (MACN-CH 894)	Late Cretaceous (Maastrichtian)	~71–69 Ma	2.5 – 2.9 m	7.5 – 9.0 m	1.3 – 2.1 tonnes	La Colonia Formation, Chubut Province, Argentina
Ceratosaurus nasicornis	Holotype (USNM 4735)	Late Jurassic (Kimmeridgian-Tithonian)	~153–148 Ma	1.8 – 2.0 m	5.3 – 7.0 m	520 – 980 kg	Morrison Formation, Colorado, United States
Coelophysis bauri	Syntypes (AMNH 2701)	Late Triassic (Norian)	~216–203 Ma	0.7 – 0.9 m	3.0 m	15 – 27 kg	Chinle Formation, New Mexico, United States
Dilophosaurus wetherilli	Holotype (UCMP 37302)	Early Jurassic (Sinemurian)	~193 Ma	1.5 – 1.9 m	6.0 – 7.0 m	400 kg	Kayenta Formation, Arizona, United States
Liliensternus liliensterni	Syntypes (MB.R.2175)	Late Triassic (Norian)	~210 Ma	1.3 m	5.2 m	130 – 200 kg	Trossingen Formation, Thuringia, Germany
Limusaurus inextricabilis	Holotype (IVPP V 15923)	Late Jurassic (Oxfordian)	~161–157 Ma	0.6 m	1.7 m	15 kg	Shishugou Formation, Xinjiang, China
Majungasaurus crenatissimus	Neotype (MNHN.F.MAE 181)	Late Cretaceous (Maastrichtian)	~70–66 Ma	2.0 m	6.0 – 8.0 m	1.1 tonnes	Maevarano Formation, Mahajanga Province, Madagascar
Masiakasaurus knopfleri	Holotype (UA 8699)	Late Cretaceous (Maastrichtian)	~70–66 Ma	0.5 – 0.6 m	2.0 m	20 kg	Maevarano Formation, Mahajanga Province, Madagascar

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Theropoda (Part 2)

This continuation captures the core avian-line carnivorous lineages—the advanced Tetanurae/Carnosauria, giant carcharodontosaurids, specialized spinosaurids, and foundational tyrannosauroids. It also includes the newly cataloged taxon Tromerosaurus solumons.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Megalosauridae
Cryolophosaurus ellioti	Holotype (FMNH PR1821)	Early Jurassic (Pliensbachian)	~194–188 Ma	2.1 m	6.0 – 6.5 m	465 kg	Hanson Formation, Mount Kirkpatrick, Antarctica
Eustreptospondylus oxoniensis	Holotype (OUMNH J.13558)	Middle Jurassic (Callovian)	~163 Ma	1.4 m	4.6 m	210 kg	Oxford Clay Formation, Oxfordshire, United Kingdom
Marshosaurus bicentesimus	Holotype (UMNH VP 6341)	Late Jurassic (Kimmeridgian)	~155–150 Ma	1.5 m	5.0 – 6.0 m	200 kg	Morrison Formation, Utah, United States
Metriacanthosaurus parkeri	Holotype (OUMNH J.12144)	Late Jurassic (Oxfordian)	~160 Ma	2.2 m	8.0 m	1.0 tonne	Oxford Clay Formation, Dorset, United Kingdom
Poekilopleuron bucklandii	Holotype (Destroyed)	Middle Jurassic (Bathonian)	~168–166 Ma	2.0 m	7.0 m	1.0 tonne	Calcaire de Caen, Normandy, France
Torvosaurus gurneyi	Holotype (ML 1100)	Late Jurassic (Tithonian)	~150–145 Ma	3.0 m	10.0 m	4.0 – 5.0 tonnes	Lourinhã Formation, Portugal
Carcharodontosauridae
Acrocanthosaurus atokensis	Holotype (OMNH 10146)	Early Cretaceous (Aptian-Albian)	~113–110 Ma	3.4 – 3.7 m	11.0 – 11.5 m	5.7 – 6.2 tonnes	Antlers Formation, Oklahoma, United States
Carcharodontosaurus iguidensis	Holotype (MNHN IK 1-10)	Late Cretaceous (Cenomanian)	~95 Ma	3.8 – 4.1 m	12.0 – 12.8 m	6.0 – 8.0 tonnes	Echkar Formation, Niger
Giganotosaurus carolinii	Holotype (MUCPv-Ch1)	Late Cretaceous (Cenomanian)	~98–97 Ma	3.9 – 4.2 m	12.2 – 13.2 m	8.0 – 8.5 tonnes	Candeleros Formation, Neuquén, Argentina
Allosauridae
Allosaurus europaeus	Holotype (ML 415)	Late Jurassic (Kimmeridgian)	~152 Ma	3.3 m	7.0 – 12.5 m	1.0 – 4.5 tonnes	Lourinhã Formation, Portugal; Morrison Formation, New Mexico, United States
Yangchuanosaurus zigongensis	Holotype (ZDM 0010)	Middle Jurassic (Bathonian-Callovian)	~165 Ma	2.5 m	7.5 – 8.0 m	1.3 – 2.0 tonnes	Lower Shaximiao Formation, Sichuan, China
Spinosauridae
Baryonyx walkeri	Holotype (BMNH PAL R9951)	Early Cretaceous (Barremian)	~125 Ma	2.5 m	7.5 – 10.0 m	1.2 – 2.0 tonnes	Weald Clay Formation, Surrey, United Kingdom
Spinosaurus aegyptiacus	Neotype (FSAC-KK 11888)	Late Cretaceous (Cenomanian)	~99–93.5 Ma	2.2 – 2.6 m (hip)	14.0 – 14.5 m	6.5 – 7.5 tonnes	Kem Kem Group, Morocco
Suchomimus tenerensis	Holotype (MNN GDF500)	Early Cretaceous (Aptian)	~121–112 Ma	2.8 m	9.5 – 11.0 m	2.5 – 3.8 tonnes	Elrhaz Formation, Tenere Desert, Niger
Tyrannosauroidea / Tyrannosauridae
Albertosaurus sarcophagus	Holotype (CMN 5600)	Late Cretaceous (Maastrichtian)	~71–68 Ma	2.4 – 2.8 m	8.0 – 9.0 m	1.7 – 2.5 tonnes	Horseshoe Canyon Formation, Alberta, Canada
Alioramus altai	Holotype (IGM 100/1844)	Late Cretaceous (Maastrichtian)	~70 Ma	1.6 m	5.0 – 6.0 m	700 kg	Nemegt Formation, Omnogovi, Mongolia
Daspletosaurus horneri	Holotype (MOR 590)	Late Cretaceous (Campanian)	~75.2–74.4 Ma	2.7 m	9.0 m	2.5 – 3.0 tonnes	Two Medicine Formation, Montana, United States
Dryptosaurus aquilunguis	Holotype (ANSP 9995)	Late Cretaceous (Maastrichtian)	~67 Ma	2.1 m	7.5 m	1.5 tonnes	New Egypt Formation, New Jersey, United States
Gorgosaurus libratus	Holotype (NMC 2120)	Late Cretaceous (Campanian)	~76.6–75.1 Ma	2.6 – 2.8 m	8.0 – 9.0 m	2.4 tonnes	Dinosaur Park Formation, Alberta, Canada
Moros intrepidus	Holotype (NCSM 33392)	Late Cretaceous (Cenomanian)	~96 Ma	1.2 m	2.5 m	78 kg	Cedar Mountain Formation, Utah, United States
Nanotyrannus lethaeus	Holotype (CMNH 7541)	Late Cretaceous (Maastrichtian)	~66 Ma	1.5 – 1.8 m	5.0 – 5.5 m	600 – 900 kg	Hell Creek Formation, Montana, United States
Qianzhousaurus sinensis	Holotype (GMV 2132)	Late Cretaceous (Maastrichtian)	~66 Ma	2.2 m	8.5 m	1.4 tonnes	Nanxiong Formation, Ganzhou, China
Tarbosaurus bataar	Holotype (PIN 551-1)	Late Cretaceous (Maastrichtian)	~70–68 Ma	3.0 – 3.3 m	10.0 – 12.0 m	4.5 – 5.0 tonnes	Nemegt Formation, Gobi Desert, Mongolia
Tromerosaurus solumons	Holotype (UALVP 52981)	Late Cretaceous (Campanian)	~76.5 Ma	2.3 – 2.6 m	7.0 – 9.0 m	2.0 – 2.3 tonnes	Oldman Formation, Alberta, Canada
Tyrannosaurus rex	Specimen "Sue" (FMNH PR2081)	Late Cretaceous (Maastrichtian)	~68–66 Ma	3.7 – 6.0 m	12.3 – 15.4 m	8.4 – 9.5 tonnes	Hell Creek Formation, South Dakota, United States

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Theropoda (Part 3)

This section covers the specialized, small-to-medium-sized coelurosaurian theropods, including nimble insectivores, feathered giants, ostrich-mimic ornithomimids, and unique, bird-like oviraptorosaurs.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Coeluridae
Coelurus fragilis	Holotype (YPM 1991)	Late Jurassic (Tithonian)	~150 Ma	0.7 m	2.4 m	13 – 20 kg	Morrison Formation, Wyoming, United States
Ornitholestes hermanni	Holotype (AMNH 619)	Late Jurassic (Kimmeridgian)	~154 Ma	0.8 m	2.0 m	12 – 15 kg	Morrison Formation, Wyoming, United States
Compsognathidae
Compsognathus longipes	Holotype (BSP AS I 563)	Late Jurassic (Tithonian)	~150 Ma	0.3 m	0.9 – 1.2 m	0.6 – 3.5 kg	Solnhofen Limestone, Bavaria, Germany
Sinosauropteryx lingyuanensis	Holotype (NIGP 127586)	Early Cretaceous (Barremian)	~124.6 Ma	0.25 m	1.1 m	0.55 kg	Yixian Formation, Liaoning, China
Proceratosauridae
Proceratosaurus bradleyi	Holotype (NHMUK R 4860)	Middle Jurassic (Bathonian)	~166 Ma	1.0 m	3.0 m	40 kg	Great Oolite Group, Gloucestershire, United Kingdom
Yutyrannus huali	Holotype (ZCDM V5000)	Early Cretaceous (Aptian)	~125 Ma	2.7 m	9.0 m	1.4 tonnes	Yixian Formation, Liaoning, China
Ornithomimidae / Deinocheiridae
Archaeornithomimus asiaticus	Lectotype (AMNH 6565)	Late Cretaceous (Cenomanian)	~96 Ma	1.1 m	3.3 m	45 – 90 kg	Iren Dabasu Formation, Inner Mongolia, China
Deinocheirus mirificus	Holotype (ZPal MgD-I/6)	Late Cretaceous (Maastrichtian)	~70 Ma	6.5 m	16.0 m	9.4 tonnes	Nemegt Formation, Gobi Desert, Mongolia
Dromiceiomimus samueli	Holotype (ROM 840)	Late Cretaceous (Campanian)	~76 Ma	1.4 m	3.5 m	100 – 150 kg	Dinosaur Park Formation, Alberta, Canada
Gallimimus bullatus	Holotype (IGM 100/11)	Late Cretaceous (Maastrichtian)	~70 Ma	1.9 – 2.1 m	6.0 m	440 kg	Nemegt Formation, Gobi Desert, Mongolia
Ornithomimus velox	Holotype (YPM 542)	Late Cretaceous (Maastrichtian)	~66 Ma	1.4 m	3.8 m	170 kg	Denver Formation, Colorado, United States
Struthiomimus altus	Holotype (AMNH 5339)	Late Cretaceous (Campanian)	~76–75 Ma	1.4 m	4.3 m	150 kg	Dinosaur Park Formation, Alberta, Canada
Oviraptoridae
Avimimus nemegtensis	Holotype (PIN 3907/1)	Late Cretaceous (Maastrichtian)	~70 Ma	0.7 m	1.5 m	15 kg	Nemegt Formation, Gobi Desert, Mongolia
Chirostenotes pergracilis	Holotype (CMN 2367)	Late Cretaceous (Campanian)	~76.5 Ma	1.0 m	2.5 m	50 kg	Dinosaur Park Formation, Alberta, Canada
Conchoraptor gracilis	Holotype (IGM 100/65)	Late Cretaceous (Maastrichtian)	~70 Ma	0.5 m	1.2 m	8 kg	Barun Goyot Formation, Gobi Desert, Mongolia
Elmisaurus rarus	Holotype (ZPal MgD-I/98)	Late Cretaceous (Maastrichtian)	~70 Ma	0.6 m	1.7 m	25 kg	Nemegt Formation, Gobi Desert, Mongolia
Oviraptor philoceratops	Holotype (AMNH 6517)	Late Cretaceous (Campanian)	~75 Ma	0.8 m	1.6 m	33 – 40 kg	Djadokhta Formation, Gobi Desert, Mongolia
Protarchaeopteryx robusta	Holotype (NGMC 2125)	Early Cretaceous (Barremian)	~124.6 Ma	0.5 m	1.0 m	2 – 4 kg	Yixian Formation, Liaoning, China

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Theropoda (Part 4)

This segment completes the Theropoda suborder. It details the pot-bellied, giant-clawed Therizinosauridae, the highly intelligent Troodontidae, the agile, sickle-clawed Dromaeosauridae (raptors), and the critical Basal Avialae transitional species that bridge classical dinosaurs with modern birds.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Therizinosauridae
Erlikosaurus andrewsi	Holotype (PIN 461/1)	Late Cretaceous (Cenomanian-Santonian)	~96–89 Ma	1.5 m	4.5 m	500 kg	Bayan Shireh Formation, Gobi Desert, Mongolia
Segnosaurus galbinensis	Holotype (PIN 4487/1)	Late Cretaceous (Cenomanian-Santonian)	~96–89 Ma	2.2 m	6.0 – 7.0 m	1.3 tonnes	Bayan Shireh Formation, Gobi Desert, Mongolia
Therizinosaurus cheloniformis	Holotype (PIN 551-483)	Late Cretaceous (Maastrichtian)	~70 Ma	3.5 m	9.0 – 10.0 m	3.0 – 5.0 tonnes	Nemegt Formation, Gobi Desert, Mongolia
Saurornithoididae / Troodontidae
Saurornithoides mongoliensis	Holotype (AMNH 6516)	Late Cretaceous (Campanian)	~75 Ma	0.8 m	2.4 m	35 – 45 kg	Djadokhta Formation, Gobi Desert, Mongolia
Stenonychosaurus inequalis	Holotype (NMC 8539)	Late Cretaceous (Campanian)	~76 Ma	0.9 m	2.5 m	50 kg	Dinosaur Park Formation, Alberta, Canada
Troodon formosus	Holotype (NMC 9117)	Late Cretaceous (Campanian)	~77 Ma	1.0 m	2.4 m	50 kg	Judith River Formation, Montana, United States
Dromaeosauridae
Bambiraptor feinbergi	Holotype (AMNH FR 30554)	Late Cretaceous (Campanian)	~75 Ma	0.3 m	0.9 m	2 kg	Two Medicine Formation, Montana, United States
Dakotaraptor steini	Holotype (PBMNH P.2015.2.T)	Late Cretaceous (Maastrichtian)	~66 Ma	1.6 – 1.8 m	5.5 m	220 – 350 kg	Hell Creek Formation, South Dakota, United States
Deinonychus antirrhopus	Holotype (YPM 5205)	Early Cretaceous (Aptian-Albian)	~115–108 Ma	1.0 m	3.4 m	73 – 100 kg	Cloverly Formation, Montana, United States
Dromaeosaurus albertensis	Holotype (AMNH 5605)	Late Cretaceous (Campanian)	~76.5 Ma	0.6 m	1.8 m	15 kg	Dinosaur Park Formation, Alberta, Canada
Saurornitholestes sullivani	Holotype (SMP VP-1270)	Late Cretaceous (Campanian)	~73 Ma	0.6 m	1.8 m	10 kg	Kirtland Formation, New Mexico, United States
Velociraptor osmolskae	Holotype (IMM 2001-V-A-01)	Late Cretaceous (Campanian)	~75 Ma	0.5 m	2.0 m	15 kg	Bayan Mandahu Formation, Inner Mongolia, China
Microraptor gui	Holotype (IVPP V 13352)	Early Cretaceous (Aptian)	~120 Ma	0.15 m	0.8 – 1.0 m	1 kg	Jiufotang Formation, Liaoning, China
Basal Avialae
Alexornis antecedens	Holotype (LACM 33213)	Late Cretaceous (Campanian)	~73 Ma	0.1 m	0.2 m	100 g	Bocana Roja Formation, Baja California, Mexico
Archaeopteryx albersdoerferi	Specimen "Müller" (SNSB-BSPG)	Late Jurassic (Tithonian)	~150 Ma	0.25 m	0.5 m	0.5 – 1.0 kg	Solnhofen Limestone, Bavaria, Germany

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Sauropodomorpha (Part 1)

This section focuses on the ancestral, bipedal-to-quadrupedal Prosauropoda and foundational sauropodomorphs. These species laid the evolutionary groundwork for the later, gigantic long-necked sauropods.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Anchisaurus polyzelus	Holotype (YPM 1883)	Early Jurassic (Pliensbachian)	~190 Ma	0.6 m	2.0 – 2.4 m	27 kg	Portland Formation, Connecticut, United States
Efraasia minor	Holotype (SMNS 11838)	Late Triassic (Norian)	~210 Ma	0.7 m	6.0 m	250 kg	Löwenstein Formation, Baden-Württemberg, Germany
Eoraptor lunensis	Holotype (PVSJ 512)	Late Triassic (Carnian)	~231.4 Ma	0.3 m	1.0 m	10 kg	Ischigualasto Formation, San Juan, Argentina
Massospondylus kaalae	Holotype (BP/1/4934)	Early Jurassic (Hettangian)	~200 Ma	1.1 m	4.0 – 6.0 m	1.0 tonne	Upper Elliot Formation, Cape Province, South Africa
Melanorosaurus readi	Syntypes (SAM 3449)	Late Triassic (Norian)	~210 Ma	2.2 m	8.0 m	1.3 tonnes	Lower Elliot Formation, Eastern Cape, South Africa
Mussaurus patagonicus	Holotype (PVL 4068)	Late Triassic (Norian)	~215 Ma	0.9 m (adult)	3.0 – 5.0 m	1.0 tonne	El Tranquilo Formation, Santa Cruz, Argentina
Plateosaurus gracilis	Holotype (SMNS 50602)	Late Triassic (Norian)	~210 Ma	1.5 – 2.0 m	4.8 – 5.0 m	600 kg	Trossingen Formation, Bavaria, Germany
Riojasaurus incertus	Holotype (PVL 3808)	Late Triassic (Norian)	~213 Ma	2.1 m	6.6 – 10.0 m	2.0 – 3.0 tonnes	Los Colorados Formation, La Rioja, Argentina
Thecodontosaurus antiquus	Holotype (Destroyed / BCM)	Late Triassic (Rhaetian)	~205 Ma	0.4 m	1.2 – 2.5 m	11 kg	Magnesian Conglomerate, Bristol, United Kingdom
Yunnanosaurus youngi	Holotype (CXMVZA 94)	Middle Jurassic (Bajocian)	~168 Ma	2.0 m	7.0 m	2.0 tonnes	Zhanghe Formation, Yunnan, China

🍄 Media Addendum & Pop Culture Anomalies

• Included within this specific archival dataset block is an intentional cartoon/fictional entry:
• • Smurfette smurfensis
• • Classification: Saurischia/Prosauropoda (Fictional Character of The Smurfs)
• • Height / Size: ~3 apples tall (approx. 15–20 cm)
• • Location / Habitat: Smurf Village, hidden deep inside the cursed or enchanted forest biome.

🦖 Order Saurischia (Lizard-Hipped Dinosaurs): Suborder Sauropodomorpha (Part 2)

This final segment of the Saurischia order catalogs the Infraorder Sauropoda, containing the largest terrestrial vertebrates to ever walk the Earth. These long-necked titans developed highly specialized column-like limbs, pneumatic (hollow) skeletal structures to reduce weight, and immense digestive tracks to process massive quantities of plant matter.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Alamosaurus sanjuanensis	Holotype (USNM 10445)	Late Cretaceous (Maastrichtian)	~67–66 Ma	5.5 – 6.5 m	26.0 – 30.0 m	30 – 50 tonnes	Ojo Alamo Formation, New Mexico, United States
Amargasaurus cazaui	Holotype (MACN-N 15)	Early Cretaceous (Barremian)	~129–122 Ma	1.9 – 2.2 m	9.0 – 10.0 m	2.1 – 2.6 tonnes	La Amarga Formation, Neuquén, Argentina
Apatosaurus ajax	Holotype (YPM 1860)	Late Jurassic (Kimmeridgian-Tithonian)	~152–151 Ma	4.0 – 6.5 m	21.0 – 23.0 m	16 – 22 tonnes	Morrison Formation, Colorado, United States
Barapasaurus tagorei	Holotype (ISI R.50)	Early Jurassic (Toarcian)	~182–174 Ma	3.5 m	12.0 – 14.0 m	7 tonnes	Kota Formation, Telangana, India
Brachiosaurus altithorax	Holotype (FMNH P 25107)	Late Jurassic (Kimmeridgian-Tithonian)	~154–153 Ma	7.0 m	20.0 – 30.0 m	28 – 55 tonnes	Morrison Formation, Colorado, United States; Kota Formation, Telangana, India
Camarasaurus supremus	AMNH Skeletal Ch.	Late Jurassic (Kimmeridgian-Tithonian)	~155–145 Ma	3.2 – 6.6 m	15.0 – 21.0 m	15 – 20 tonnes	Morrison Formation, Colorado, United States
Cetiosaurus oxoniensis	Lectotype (OUMNH J.13617)	Middle Jurassic (Bajocian-Bathonian)	~168–166 Ma	3.1 m	16.0 m	11 tonnes	Forest Marble Formation, Oxfordshire, United Kingdom
Dicraeosaurus sattleri	Syntypes (MB.R.2173)	Late Jurassic (Kimmeridgian)	~152 Ma	2.3 m	12.0 m	4 – 5.5 tonnes	Tendaguru Formation, Lindi Region, Tanzania
Diplodocus hallorum	Holotype (NMMNH P-3690)	Late Jurassic (Kimmeridgian-Tithonian)	~154–152 Ma	4.5 – 6.0 m	29.0 – 32.0 m	12 – 15 tonnes	Morrison Formation, New Mexico, United States
Dreadnoughtus schrani	Holotype (MPM-PV 1156)	Late Cretaceous (Campanian-Maastrichtian)	~77–70 Ma	7.0 m	26.0 m	38 – 49 tonnes	Cerro Fortaleza Formation, Santa Cruz, Argentina
Euhelopus zdanskyi	Holotype (PMU 233)	Early Cretaceous (Barremian-Aptian)	~129–113 Ma	2.4 m	11.0 – 13.0 m	3.5 – 4 tonnes	Mengyin Formation, Shandong, China
Mamenchisaurus sinocanadorum	Holotype (IVPP V10603)	Late Jurassic (Oxfordian)	~161–159 Ma	6.0 m	35.0 m	60 – 75 tonnes	Shishugou Formation, Xinjiang, China
Omeisaurus fuxiensis	Holotype (ZDM 0011)	Middle Jurassic (Bathonian-Callovian)	~165 Ma	2.6 m	11.0 – 14.0 m	4 – 5 tonnes	Xiashaximiao Formation, Sichuan, China
Opisthocoelicaudia skarzynskii	Holotype (ZPAL MgD-I/48)	Late Cretaceous (Maastrichtian)	~70 Ma	2.6 m	11.4 m	8.4 – 10 tonnes	Nemegt Formation, Gobi Desert, Mongolia
Patagotitan mayorum	Holotype (MPEF-PV 3400)	Late Cretaceous (Albian)	~101.6 Ma	7.2 m	37.0 m	55 – 69 tonnes	Cerro Barcino Formation, Chubut Province, Argentina
Saltasaurus loricatus	Holotype (PVL 4017)	Late Cretaceous (Maastrichtian)	~70–66 Ma	1.8 m	8.5 m	2.5 – 3.5 tonnes	Lecho Formation, Salta, Argentina
Sauroposeidon proteles	Holotype (OMNH 53062)	Early Cretaceous (Aptian-Albian)	~112–110 Ma	6.5 – 7.0 m	28.0 – 34.0 m	40 – 50 tonnes	Antlers Formation, Oklahoma, United States
Supersaurus vivianae	Holotype (BYU 9025)	Late Jurassic (Kimmeridgian-Tithonian)	~154 Ma	9.3 m	39.0 – 45.0 m	35 – 40 tonnes	Morrison Formation, Colorado, United States

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Cerapoda (Part 1)

This section marks our transition into the Ornithischia order, beginning with the basal Fabrosauridae and tusked Heterodontosauridae, followed by the highly successful Ornithopoda branch. These animals pioneered advanced plant-grinding dental mechanisms, helping them thrive as highly efficient herbivores.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Fabrosauridae & Heterodontosauridae
Abrictosaurus consors	Holotype (UCL B54)	Early Jurassic (Hettangian-Sinemurian)	~200–190 Ma	0.35 m	1.2 m	45 kg	Upper Elliot Formation, Lesotho
Echinodon becklesii	Lectotype (NHMUK OR48209)	Early Cretaceous (Berremian)	~140 Ma	0.2 m	0.6 m	0.5 – 1.0 kg	Purbeck Group, Dorset, United Kingdom
Fabrosaurus australis	Holotype (MNHN LES9)	Early Jurassic (Hettangian)	~199 Ma	0.3 m	1.0 m	40 kg	Upper Elliot Formation, Lesotho
Geranosaurus atavus	Holotype (SAM 1871)	Early Jurassic (Hettangian)	~199 Ma	0.4 m	1.2 m	45 kg	Clarens Formation, Cape Province, South Africa
Heterodontosaurus tucki	Holotype (SAM K1332)	Early Jurassic (Hettangian)	~199 Ma	0.4 m	1.2 – 1.3 m	2 – 3.4 kg	Upper Elliot Formation, Cape Province, South Africa
Lesothosaurus diagnosticus	Holotype (UCL B17)	Early Jurassic (Hettangian-Sinemurian)	~200–190 Ma	0.4 m	2.0 m	10 kg	Upper Elliot Formation, Lesotho
Pisanosaurus mertii	Holotype (PVL 2577)	Late Triassic (Carnian)	~228 Ma	0.3 m	1.0 m	2.3 – 9 kg	Ischigualasto Formation, San Juan, Argentina
Infraorder Ornithopoda (Basal)
Callovosaurus leedsi	Holotype (NHMUK R3073)	Middle Jurassic (Callovian)	~163 Ma	0.8 m	2.5 m	25 kg	Oxford Clay Formation, England, United Kingdom
Camptosaurus dispar	Holotype (YPM 1877)	Late Jurassic (Kimmeridgian-Tithonian)	~156–147 Ma	1.6 – 2.0 m	5.0 – 6.0 m	500 – 800 kg	Morrison Formation, Wyoming, United States
Dryosaurus elderae	Holotype (CM 3392)	Late Jurassic (Kimmeridgian)	~155–150 Ma	0.9 m	2.4 – 3.0 m	70 – 90 kg	Morrison Formation, Utah, United States
Fulgurotherium australe	Holotype (BMNH R10255)	Early Cretaceous (Albian)	~113–100 Ma	0.4 m	1.3 – 2.0 m	6 kg	Toolebuc Formation, New South Wales, Australia
Hippodraco scutodens	Holotype (UMNH VP 11689)	Early Cretaceous (Barremian)	~124 Ma	1.5 m	4.5 m	400 kg	Cedar Mountain Formation, Utah, United States
Hypsilophodon foxii	Holotype (BMNH R197)	Early Cretaceous (Barremian)	~130–125 Ma	0.6 m	1.8 m	20 kg	Wessex Formation, Isle of Wight, United Kingdom
Iguanodon bernissartensis	Holotype (IRSNB 1534)	Early Cretaceous (Barremian-Aptian)	~126–122 Ma	2.7 – 4.2 m	9.0 – 12.0 m	3.0 – 4.5 tonnes	Sainte-Barbe Clays Formation, Bernissart, Belgium
Loncosaurus argentinus	Holotype (MACN-N 11)	Late Cretaceous (Santonian)	~86–83 Ma	0.7 m	2.0 – 2.5 m	30 kg	Cardiel Formation, Santa Cruz, Argentina
Muttaburrasaurus langdoni	Holotype (QM F6140)	Early Cretaceous (Albian)	~105–103 Ma	2.1 m	7.0 – 8.0 m	2.8 tonnes	Mackunda Formation, Queensland, Australia
Nanosaurus agilis	Holotype (YPM 1913)	Late Jurassic (Kimmeridgian-Tithonian)	~155–148 Ma	0.4 m	2.0 m	10 kg	Morrison Formation, Colorado, United States
Ouranosaurus nigeriensis	Holotype (MNHN GDF 300)	Early Cretaceous (Aptian)	~125–112 Ma	2.2 m	7.0 – 8.3 m	2.2 tonnes	Elrhaz Formation, Gadoufaoua, Niger
Parksosaurus warreni	Holotype (ROM 804)	Late Cretaceous (Maastrichtian)	~70 Ma	0.9 m	2.5 m	45 kg	Horseshoe Canyon Formation, Alberta, Canada
Probactrosaurus gobiensis	Holotype (PIN 2232/1)	Late Cretaceous (Cenomanian)	~96 Ma	1.8 m	5.5 – 6.0 m	1.0 tonne	Iren Dabasu Formation, Inner Mongolia, China
Tenontosaurus dossi	Holotype (FWMSH 93B1)	Early Cretaceous (Aptian-Albian)	~115–108 Ma	2.0 m	6.5 – 7.0 m	1.0 – 1.5 tonnes	Twin Mountains Formation, Texas, United States
Thescelosaurus garbanii	Holotype (LACM 33542)	Late Cretaceous (Maastrichtian)	~66 Ma	1.0 m	3.0 – 4.0 m	200 – 300 kg	Hell Creek Formation, Montana, United States
Valdosaurus canaliculatus	Holotype (BMNH R171)	Early Cretaceous (Barremian)	~125 Ma	0.8 m	3.0 m	50 kg	Wessex Formation, Isle of Wight, United Kingdom
Zephyrosaurus schaffi	Holotype (MCZ 4392)	Early Cretaceous (Aptian-Albian)	~113 Ma	0.6 m	1.8 m	20 kg	Cloverly Formation, Montana, United States

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Cerapoda (Part 2)

This segment catalogs the Family Hadrosauridae, popularly known as the duck-billed dinosaurs. Divided into the flat-headed or solid-crested Hadrosaurinae (or Saurolophinae) and the hollow-crested Lambeosaurinae, these advanced herbivores traveled in vast herds and possessed sophisticated dental batteries containing hundreds of tightly packed teeth for grinding tough vegetation.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Hadrosaurinae (Saurolophinae)
Brachylophosaurus canadensis	Holotype (NMC 8893)	Late Cretaceous (Campanian)	~78 Ma	2.2 m	9.0 m	3.7 – 4.5 tonnes	Judith River Formation, Alberta, Canada
Edmontosaurus regalis	Holotype (NMC 2288)	Late Cretaceous (Maastrichtian)	~73–71.5 Ma	3.5 – 4.0 m	12.0 – 13.0 m	4.0 – 5.6 tonnes	Horseshoe Canyon Formation, Alberta, Canada; Lance Formation, Wyoming, USA
Kritosaurus navajovius	Holotype (AMNH 5799)	Late Cretaceous (Campanian)	~73 Ma	2.5 m	9.0 m	3.5 – 4.0 tonnes	Kirtland Formation, New Mexico, United States
Maiasaura peeblesorum	Holotype (PU 22405)	Late Cretaceous (Campanian)	~76.7 Ma	2.2 m	9.0 m	4.0 tonnes	Two Medicine Formation, Montana, United States
Saurolophus osborni	Holotype (AMNH 5220)	Late Cretaceous (Maastrichtian)	~70 Ma	2.8 m	9.8 m	3.8 tonnes	Horseshoe Canyon Formation, Alberta, Canada
Shantungosaurus giganteus	Holotype (GMV 1780-1)	Late Cretaceous (Campanian)	~73 Ma	5.0 – 6.5 m	15.0 – 16.6 m	15 – 17 tonnes	Wangshi Group, Shandong, China
Lambeosaurinae
Corythosaurus casuarius	Holotype (AMNH 5240)	Late Cretaceous (Campanian)	~77–75.7 Ma	2.5 m	9.0 m	3.8 – 4.6 tonnes	Dinosaur Park Formation, Alberta, Canada; Lance Formation, Wyoming, USA
Hypacrosaurus stebingeri	Holotype (MOR 549)	Late Cretaceous (Campanian)	~75 Ma	2.6 m	9.1 m	4.0 tonnes	Two Medicine Formation, Montana, United States
Lambeosaurus magnicristatus	Holotype (NMC 8705)	Late Cretaceous (Campanian)	~75 Ma	2.6 m	9.1 m	4.0 – 4.5 tonnes	Dinosaur Park Formation, Alberta, Canada
Olorotitan arharensis	Holotype (AEHM 2/845)	Late Cretaceous (Maastrichtian)	~68–66 Ma	3.0 m	12.0 m	5.0 tonnes	Tsagayan Formation, Amur Region, Russia
Parasaurolophus walkeri	Holotype (ROM 768)	Late Cretaceous (Campanian)	~76.5–74.5 Ma	2.8 m	9.5 – 10.0 m	2.5 – 3.5 tonnes	Dinosaur Park Formation, Alberta, Canada
Tsintaosaurus spinorhinus	Holotype (IVPP V725)	Late Cretaceous (Campanian)	~73 Ma	2.8 m	8.3 – 10.0 m	3.0 tonnes	Wangshi Group, Shandong, China

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Cerapoda (Part 3)

This section maps out the Infraorder Pachycephalosauria, widely recognized as the dome-headed dinosaurs. Ranging from tiny, flat-headed species to giant, thick-skulled titans, these specialized bipedal herbivores developed massive deposits of solid bone on top of their skulls, frequently fringed with ornamental nodes, spikes, or horns.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Dracorex hogwartsia	Holotype (TCM 2004.17.1)	Late Cretaceous (Maastrichtian)	~66 Ma	0.9 m	3.0 m	70 – 90 kg	Hell Creek Formation, South Dakota, United States
Goyocephale lattimorei	Holotype (AMPG 100/1501)	Late Cretaceous (Santonian-Campanian)	~76 Ma	0.4 m	2.0 m	10 – 18 kg	Bayan Shireh Formation, Gobi Desert, Mongolia
Homalocephale calathocercos	Holotype (GI SPS 100/1201)	Late Cretaceous (Maastrichtian)	~70 Ma	0.5 m	1.8 m	43 kg	Nemegt Formation, Gobi Desert, Mongolia
Micropachycephalosaurus hongtuyanensis	Holotype (IVPP V5542)	Late Cretaceous (Campanian)	~73 Ma	0.3 m	1.0 m	3.0 – 5.0 kg	Wangshi Group, Shandong, China
Pachycephalosaurus wyomingensis	Holotype (AMNH 1696)	Late Cretaceous (Maastrichtian)	~68–66 Ma	1.5 – 1.8 m	4.5 m	450 kg	Hell Creek Formation, Montana, United States
Prenocephale prenes	Holotype (GI SPS 100/501)	Late Cretaceous (Maastrichtian)	~70 Ma	0.8 m	2.4 m	130 kg	Nemegt Formation, Gobi Desert, Mongolia
Stegoceras validum	Holotype (CMN 515)	Late Cretaceous (Campanian)	~76.5 Ma	0.7 m	2.0 m	10 – 40 kg	Dinosaur Park Formation, Alberta, Canada
Stygimoloch spinifer	Holotype (UCMP 119433)	Late Cretaceous (Maastrichtian)	~66 Ma	1.0 m	3.0 m	80 – 100 kg	Hell Creek Formation, Montana, United States
Wannanosaurus yansiensis	Holotype (IVPP V4447)	Late Cretaceous (Maastrichtian)	~70 Ma	0.25 m	0.6 m	1.5 kg	Xiaodian Formation, Anhui, China

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Cerapoda (Part 4)

This segment logs the Infraorder Ceratopsia, tracking their evolutionary jump from small, bipedal forms with simple facial structures up to massive, multi-tonne quadrupedal animals. These advanced Ceratopsids developed immense bony head frills, complex horn arrangements, and highly powerful shearing beaks.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Basal Ceratopsians & Protoceratopids
Psittacosaurus meileyingensis	Holotype (IVPP V7429)	Early Cretaceous (Aptian)	~120 Ma	0.5 m	2.0 m	20 kg	Jiufotang Formation, Liaoning, China
Microceratus gobiensis	Holotype (IVPP V232)	Late Cretaceous (Santonian)	~85 Ma	0.25 m	0.6 m	2 kg	Minhe Formation, Gobi Desert, Mongolia
Auroraceratops rugosus	Holotype (IG-V-04-016)	Early Cretaceous (Aptian)	~115 Ma	0.4 m	1.2 – 2.0 m	15.5 kg	Xinminbao Group, Gansu, China
Bagaceratops rozhdestvenskyi	Holotype (ZPAL MgD-I/126)	Late Cretaceous (Campanian)	~72 Ma	0.35 m	1.0 m	22 kg	Barun Goyot Formation, Gobi Desert, Mongolia
Protoceratops hellenikorhinus	Holotype (IMM 95-BM-1/1)	Late Cretaceous (Campanian)	~75–71 Ma	0.7 m	2.0 – 2.5 m	180 kg	Bayan Mandahu Formation, Inner Mongolia, China
Leptoceratops gracilis	Holotype (NMC 8889)	Late Cretaceous (Maastrichtian)	~66.8 Ma	0.8 m	2.0 m	100 kg	Scollard Formation, Alberta, Canada
Montanoceratops cerorhynchus	Holotype (AMNH 5464)	Late Cretaceous (Maastrichtian)	~70 Ma	0.9 m	3.0 m	170 kg	St. Mary River Formation, Montana, United States
Ceratopsidae (Centrosaurinae)
Centrosaurus apertus	Holotype (AMNH 5239)	Late Cretaceous (Campanian)	~76.5–75.5 Ma	2.1 m	5.5 m	2.3 tonnes	Dinosaur Park Formation, Alberta, Canada
Styracosaurus ovatus	Holotype (USNM 11869)	Late Cretaceous (Campanian)	~75 Ma	2.3 m	5.5 m	2.7 tonnes	Two Medicine Formation, Montana, United States
Pachyrhinosaurus lakustai	Holotype (TMP 1986.055.0001)	Late Cretaceous (Campanian)	~73.5 Ma	2.5 m	6.0 m	3.0 tonnes	Wapiti Formation, Alberta, Canada; Hell Creek Formation, Montana, USA
Sinoceratops zhuchengensis	Holotype (ZCDM V0010)	Late Cretaceous (Campanian)	~73 Ma	2.6 m	6.0 m	2.0 – 2.3 tonnes	Xingezhuang Formation, Shandong, China
Nasutoceratops titusi	Holotype (UMNH VP 16800)	Late Cretaceous (Campanian)	~75.9 Ma	2.2 m	4.5 m	1.5 tonnes	Kaiparowits Formation, Utah, United States
Lokiceratops rangiformis	Holotype (EMDE 001)	Late Cretaceous (Campanian)	~78 Ma	2.5 m	6.7 m	5.0 tonnes	Judith River Formation, Montana, United States
Ceratopsidae (Chasmosaurinae)
Chasmosaurus belli	Holotype (GSC 491)	Late Cretaceous (Campanian)	~76.5–76 Ma	2.0 m	4.8 m	2.0 tonnes	Dinosaur Park Formation , Alberta, Canada
Pentaceratops sternbergii	Holotype (AMNH 6325)	Late Cretaceous (Campanian)	~75–73 Ma	4.8 m	6.0 m	4.7 tonnes	Kirtland Formation, New Mexico, United States
Torosaurus latus	Holotype (YPM 1830)	Late Cretaceous (Maastrichtian)	~68–66 Ma	3.0 m	7.5 – 8.0 m	6.0 tonnes	Lance Formation, Wyoming, United States
Triceratops horridus	Holotype (YPM 1820)	Late Cretaceous (Maastrichtian)	~68–66 Ma	2.9 – 3.0 m	8.0 – 9.0 m	7.0 – 9.0 tonnes	Hell Creek Formation, Wyoming, United States

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Thyreophora (Part 1)

This section maps out the Order Stegosauria within the armored Thyreophora lineage. These slow-moving, quadrupedal herbivores are famous for their unique rows of osteoderms (modified bony plates and spikes) running down their backs and necks, ending in a defensive spike array at the tip of the tail known as a thagomizer.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Chungkingosaurus jiangbeiensis	Holotype (CV 00206)	Late Jurassic (Oxfordian)	~161–157 Ma	1.2 m	3.0 – 4.0 m	1.0 tonne	Upper Shaximiao Formation, Chongqing, China
Dacentrurus armatus	Holotype (BMNH 46013)	Late Jurassic (Kimmeridgian)	~154–150 Ma	2.3 m	7.0 – 8.0 m	3.0 – 5.0 tonnes	Kimberidge Clay Formation, Wiltshire, United Kingdom
Gigantspinosaurus sichuanensis	Holotype (ZDM 0019)	Late Jurassic (Oxfordian)	~161–157 Ma	1.4 m	4.2 m	700 kg	Upper Shaximiao Formation, Sichuan, China
Huayangosaurus taibaii	Holotype (IVPP V6728)	Middle Jurassic (Bajocian-Callovian)	~168–163 Ma	1.3 m	4.5 m	1.2 tonnes	Lower Shaximiao Formation, Sichuan, China
Kentrosaurus aethiopicus	Lectotype (MB.R.4800)	Late Jurassic (Kimmeridgian-Tithonian)	~152 Ma	1.5 m	4.5 m	1.1 tonnes	Tendaguru Formation, Lindi Region, Tanzania
Stegosaurus stenops	Holotype (USNM 4934)	Late Jurassic (Kimmeridgian-Tithonian)	~155–150 Ma	2.5 – 5.8 m	6.5 – 10.5 m	3.5 – 6.3 tonnes	Morrison Formation, Colorado, United States
Tuojiangosaurus multispinus	Holotype (CV 00209)	Late Jurassic (Oxfordian)	~161–157 Ma	2.0 m	7.0 m	2.8 tonnes	Upper Shaximiao Formation, Sichuan, China

🛡️ Order Ornithischia (Bird-Hipped Dinosaurs): Suborder Thyreophora (Part 2)

This segment logs the Order Ankylosauria, tracking the final evolutionary branch of armored dinosaurs. Spanning primitive, lightly armored bipeds up to multi-tonne quadrupedal fortress-animals, this group is split into the club-tailed Ankylosauridae and the shoulder-spiked Nodosauridae.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Hip Height	Total Length	Est. Body Mass	Discovery Location & Formation
Basal Thyreophorans
Scutellosaurus lawleri	Holotype (MNA Pl.175)	Early Jurassic (Hettangian-Sinemurian)	~196 Ma	0.3 m	1.2 m	3 kg	Kayenta Formation, Arizona, United States
Scelidosaurus harrisonii	Holotype (BMNH R1111)	Early Jurassic (Sinemurian)	~191 Ma	1.1 m	4.0 m	270 kg	Charmouth Mudstone Formation, Dorset, United Kingdom
Nodosauridae & Basal Ankylosaurs
Minmi paravertebra	Holotype (QM F10329)	Early Cretaceous (Aptian)	~120–112 Ma	0.8 m	3.0 m	300 kg	Bungil Formation, Queensland, Australia
Nodosaurus textilis	Holotype (YPM 1815)	Late Cretaceous (Cenomanian)	~95 Ma	1.4 m	4.0 – 6.0 m	1.5 tonnes	Frontier Formation, Wyoming, United States
Polacanthus foxii	Holotype (BMNH R1106)	Early Cretaceous (Barremian)	~125 Ma	1.2 m	4.0 – 5.0 m	1.3 tonnes	Wessex Formation, Isle of Wight, United Kingdom
Sauropelta edwardsorum	Holotype (AMNH 3016)	Early Cretaceous (Albian)	~108 Ma	1.6 m	5.2 m	1.5 tonnes	Cloverly Formation, Montana, United States
Ankylosauridae
Ankylosaurus magniventris	Holotype (AMNH 5895)	Late Cretaceous (Maastrichtian)	~68–66 Ma	3.7 m	6.0 – 11.0 m	4.8 – 8.0 tonnes	Hell Creek Formation, Montana, United States
Euoplocephalus tutus	Holotype (CMN 210)	Late Cretaceous (Campanian)	~76.4 Ma	1.5 m	5.5 m	2.5 tonnes	Dinosaur Park Formation, Alberta, Canada
Pinacosaurus grangeri	Holotype (AMNH 6523)	Late Cretaceous (Campanian)	~75 Ma	1.1 m	5.0 m	1.9 tonnes	Djadokhta Formation, Gobi Desert, Mongolia
Talarurus plicatospineus	Holotype (PIN 557)	Late Cretaceous (Turonian-Santonian)	~90–85 Ma	1.3 m	5.0 m	2.0 tonnes	Bayan Shireh Formation, Gobi Desert, Mongolia

🪁 Order Pterosauria (Flying Reptiles)

This section maps out the Order Pterosauria, the first group of vertebrates to evolve powered flight. While they lived alongside dinosaurs, these flying reptiles belong to a distinct lineage. They are split into the primitive, long-tailed Rhamphorhynchoidea and the more advanced, short-tailed Pterodactyloidea, which eventually produced the largest flying animals in Earth's history.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Standing Height	Total Wingspan	Est. Body Mass	Discovery Location & Formation
Suborder Rhamphorhynchoidea
Anurognathus ammoni	Holotype (BSPG 1922-I-42)	Late Jurassic (Tithonian)	~150 Ma	5 cm	35 cm	40 g	Solnhofen Limestone, Bavaria, Germany
Dimorphodon macronyx	Holotype (BMNH 41212)	Early Jurassic (Sinemurian)	~195–190 Ma	30 cm	1.2 – 1.4 m	1.5 – 2.0 kg	Blue Lias Formation, Dorset, United Kingdom
Eudimorphodon ranzii	Holotype (MCSNB 2888)	Late Triassic (Norian)	~210 Ma	20 cm	1.0 m	500 g	Zorzino Limestone, Cene, Italy
Rhamphorhynchus etchesi	Holotype (Kimmeridge Spec.)	Late Jurassic (Kimmeridgian)	~151 Ma	20 cm	1.2 – 1.8 m	1.0 – 1.5 kg	Kimmeridge Clay Formation, Dorset, United Kingdom
Scaphognathus crassirostris	Holotype (GPIB 130)	Late Jurassic (Kimmeridgian)	~152 Ma	25 cm	0.9 m	800 g	Solnhofen Limestone, Bavaria, Germany
Suborder Pterodactyloidea
Arthurdactylus conandoylei	Holotype (SMNK PAL 1132)	Early Cretaceous (Aptian)	~115 Ma	0.7 m	4.6 m	10 kg	Crato Formation, Ceará, Brazil
Caiuajara dobruskii	Holotype (CP.V 1449)	Late Cretaceous (Turonian)	~90–85 Ma	0.6 m	2.35 m	6 kg	Goio-Erê Formation, Paraná, Brazil
Cearadactylus atrox	Holotype (MN 7019-V)	Early Cretaceous (Albian)	~112 Ma	0.8 m	4.0 – 5.5 m	15 kg	Romualdo Formation, Araripe Basin, Brazil
Ctenochasma elegans	Holotype (BSPG 1875-XIV-501)	Late Jurassic (Tithonian)	~150 Ma	15 cm	0.4 – 1.2 m	200 – 400 g	Solnhofen Limestone, Bavaria, Germany
Dsungaripterus weii	Holotype (IVPP V2776)	Early Cretaceous (Aptian)	~115 Ma	0.7 m	3.0 – 3.5 m	12 – 15 kg	Tugulu Group, Xinjiang, China
Ornithocheirus simus	Holotype (CAMSM B54429)	Early Cretaceous (Albian)	~110 Ma	1.2 m	5.0 – 6.0 m	20 – 30 kg	Cambridge Greensand, Cambridgeshire, United Kingdom
Pteranodon sternbergi	Holotype (KUVP 99)	Late Cretaceous (Coniacian-Santonian)	~88–83 Ma	1.5 m	6.0 m	20 – 35 kg	Niobrara Formation, Kansas, United States
Pterodaustro guinazui	Holotype (PLV 2571)	Early Cretaceous (Albian)	~105 Ma	30 cm	2.5 m	2.5 kg	Lohan Cura Formation, San Luis, Argentina
Quetzalcoatlus lawsoni	Holotype (TMM 41961-1)	Late Cretaceous (Maastrichtian)	~67–66 Ma	12.2 m	4.7 – 25.5 m	60 – 70,000 kg	Javelina Formation, Texas, United States
Tapejara wellnhoferi	Holotype (MN 6526-V)	Early Cretaceous (Aptian)	~112 Ma	0.6 m	3.0 – 3.5 m	5 kg	Romualdo Formation, Araripe Basin, Brazil
Tropeognathus mesembrinus	Holotype (MN 6521-V)	Early Cretaceous (Albian)	~110 Ma	1.4 m	6.2 – 8.2 m	30 – 45 kg	Romualdo Formation, Araripe Basin, Brazil

🌊 Marine Reptiles & Prehistoric Fish (Neighboring Megafauna)

This section maps out the apex ocean predators and giant aquatic lineages of the Paleozoic and Mesozoic Eras. These distinct lineages are organized by order, spanning the dolphin-like Ichthyosauria, long-necked Plesiosauria, crushing apex Pliosaurs, specialized apex Mosasaurids, and massive prehistoric fish.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Maximum Depth / Height	Total Length	Est. Body Mass	Discovery Location & Formation
Mesosauria & Nothosauria
Mesosaurus tenuidens	Holotype (MNHN 1865)	Early Permian (Artinskian)	~280 Ma	0.15 m	1.0 m	2.0 kg	Irati Formation, Paraná Basin, Brazil
Nothosaurus giganteus	Holotype (SMNS 11855)	Middle Triassic (Ladinian)	~240 Ma	0.8 m	4.0 – 5.5 m	300 – 600 kg	Upper Muschelkalk, Baden-Württemberg, Germany
Ichthyosauria
Eurhinosaurus huenei	Holotype (SMNS 15850)	Early Jurassic (Toarcian)	~180 Ma	0.6 m	6.0 m	1.0 tonne	Posidonia Shale, Holzmaden, Germany
Ichthyosaurus conybeari	Holotype (BMNH 40326)	Early Jurassic (Sinemurian)	~195 Ma	0.4 m	2.0 – 3.3 m	90 – 150 kg	Blue Lias Formation, Dorset, United Kingdom
Ophthalmosaurus icenicus	Holotype (BMNH R2180)	Late Jurassic (Oxfordian)	~160 Ma	0.8 m	4.0 – 5.0 m	900 kg	Oxford Clay Formation, Peterborough, United Kingdom
Shonisaurus popularis	Holotype (NV 1)	Late Triassic (Norian)	~215 Ma	3.5 m	13.0 – 15.0 m	20 – 30 tonnes	Luning Formation, Nevada, United States
Plesiosauria (Plesiosaurs & Pliosaurs)
Attenborosaurus conybeari	Holotype (GSM 50257)	Early Jurassic (Sinemurian)	~190 Ma	0.9 m	5.0 m	700 kg	Blue Lias Formation, Dorset, United Kingdom
Cryptoclidus richardsoni	Holotype (BMNH 47021)	Late Jurassic (Callovian)	~163 Ma	0.7 m	3.0 – 4.0 m	250 kg	Oxford Clay Formation, England, United Kingdom
Dolichorhynchops herschelensis	Holotype (RSM P2310.1)	Late Cretaceous (Campanian)	~72 Ma	0.5 m	4.3 m	220 kg	Bearpaw Formation, Saskatchewan, Canada
Elasmosaurus platyurus	Holotype (ANSP 10081)	Late Cretaceous (Campanian)	~80.5 Ma	1.2 m	10.3 m	2.0 tonnes	Pierre Shale Formation, Kansas, United States
Kronosaurus queenslandicus	Holotype (QM F1609)	Early Cretaceous (Albian)	~110 Ma	2.2 m	9.0 – 10.5 m	9.0 – 11.0 tonnes	Toolebuc Formation, Queensland, Australia
Liopleurodon ferox	Holotype (BMNH R2684)	Late Jurassic (Callovian)	~162–155 Ma	1.8 m	5.0 – 7.0 m	1.5 – 3.0 tonnes	Oxford Clay Formation, Cambridgeshire, United Kingdom
Plesiosaurus dolichodeirus	Holotype (BMNH 22656)	Early Jurassic (Sinemurian)	~199 Ma	0.6 m	3.5 m	180 kg	Blue Lias Formation, Dorset, United Kingdom
Trinacromerum kirki	Holotype (USNM 11210)	Late Cretaceous (Turonian)	~90 Ma	0.5 m	3.0 m	150 kg	Greenhorn Limestone, Kansas, United States
Squamata (Mosasaurids & Monitors)
Clidastes propython	Holotype (YPM 1258)	Late Cretaceous (Campanian)	~82 Ma	0.4 m	2.0 – 4.0 m	50 kg	Mooreville Chalk Formation, Alabama, United States
Jormungandr walhallaensis	Holotype (NDGS 10838)	Late Cretaceous (Campanian)	~80 Ma	0.8 m	7.3 m	1.2 tonnes	Pierre Shale Formation, North Dakota, United States
Megalania priscus	Holotype (BMNH 32903)	Pleistocene	~0.04 Ma	0.9 m	5.5 – 7.0 m	600 – 1,900 kg	Allingham Formation, Queensland, Australia
Mosasaurus beaugei	Holotype (OCP DEK/GE 28)	Late Cretaceous (Maastrichtian)	~66 Ma	3.2 m	10.0 – 23.0 m	5.0 – 8.0 tonnes	Ouled Abdoun Basin, Khouribga, Morocco
Tylosaurus bernardi	Holotype (IRSNB 367)	Late Cretaceous (Maastrichtian)	~68–66 Ma	2.5 m	12.2 – 13.0 m	7.0 – 10.0 tonnes	Ciply Phosphatic Chalk, Hainaut, Belgium
Prehistoric Fish
Dunkleosteus amblyodoratus	Holotype (CMNH 57425)	Late Devonian (Famennian)	~360 Ma	4.2 m	12.6 – 14.0 m	12.0 tonnes	Cleveland Shale, Ohio, United States
Otodus megalodon	AMNH Dental Ch.	Miocene-Pliocene	~23–3.6 Ma	5.8 m	15.0 – 18.0 m	48 – 60 tonnes	Yorktown Formation, North Carolina, United States

🐾 Synapsids & Prehistoric Mammals

This final segment logs the Synapsids and early mammalian relatives. Often mistaken for dinosaurs, these animals are part of the "mammal-like reptile" lineage that split from true reptiles long before dinosaurs emerged. They include early apex predators with dorsal sails, highly resilient tusker dicynodonts, and tiny, adaptable mammals that survived the dinosaur extinction event.

Taxon	Specimen Type / ID	Geological Age	Chronological Time	Shoulder Height	Total Length	Est. Body Mass	Discovery Location & Formation
Order Pelycosauria
Dimetrodon grandis	Holotype (AMNH 4034)	Early Permian (Artinskian)	~280 Ma	1.2 – 1.4 m	3.2 – 3.5 m	250 kg	Arroyo Formation, Texas, United States
Order Therapsida
Alphadon halleyi	Holotype (UCMP 53120)	Late Cretaceous (Maastrichtian)	~66 Ma	5 – 8 cm	30 cm	150 – 300 g	Hell Creek Formation, Montana, United States
Bulbasaurus phylloxyron	Holotype (SAM-PK-K10587)	Late Permian (Wuchiapingian)	~256 Ma	15 cm	40 cm	2.0 kg	Balfour Formation, Karoo Basin, South Africa
Lystrosaurus curvatus	Holotype (SAM 2337)	Late Permian - Early Triassic	~252 Ma	35 cm	0.9 – 1.2 m	90 kg	Normandien Formation, Free State, South Africa

📰 Article(s) of the same category(ies)

• List of Dinosauria
• Classification of Dinosaurs
• Disney Dinosaurs and Other Reptile
• Invalid dinosaur
• Teodora's Encyclopedia of Dinosaurs and Prehistoric Animals
• Dinowars

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