[{"n": "Cryptoclidus", "u": "/e/ancient-reptiles/cryptoclidus/", "s": "A Middle Jurassic plesiosaur with hidden clavicles."}, {"n": "Cynodontia", "u": "/e/ancient-reptiles/cynodontia/", "s": "Clade of therapsids that includes mammals and their extinct relatives."}, {"n": "Dallasaurus", "u": "/e/ancient-reptiles/dallasaurus/", "s": "Small basal mosasauroid from the Upper Cretaceous of Texas."}, {"n": "Deinocheirus", "u": "/e/ancient-reptiles/deinocheirus/", "s": "A large, bulky ornithomimosaur with a hadrosaur-like skull."}, {"n": "Deinosuchus", "u": "/e/ancient-reptiles/deinosuchus/", "s": "A massive Late Cretaceous eusuchian, either an alligatoroid or stem-group crocodilian, known from fossils acro"}, {"n": "Diadectes", "u": "/e/ancient-reptiles/diadectes/", "s": "Early Permian herbivorous tetrapod, one of the first large land vertebrates."}, {"n": "Dicynodontia", "u": "/e/ancient-reptiles/dicynodontia/", "s": "Extinct herbivorous therapsids with tusks and a horny beak."}, {"n": "Dimetrodon", "u": "/e/ancient-reptiles/dimetrodon/", "s": "Permian sail-backed synapsid, more mammal-like than reptile."}, {"n": "Dimorphodon", "u": "/e/ancient-reptiles/dimorphodon/", "s": "A medium-sized pterosaur with two tooth types and short wings."}, {"n": "Dinocephalia", "u": "/e/ancient-reptiles/dinocephalia/", "s": "Large-bodied therapsids of the Middle Permian with thickened skulls."}, {"n": "Diplocaulus", "u": "/e/ancient-reptiles/diplocaulus/", "s": "Extinct lepospondyl amphibian with a boomerang-shaped skull."}, {"n": "Drepanosauromorpha", "u": "/e/ancient-reptiles/drepanosauromorpha/", "s": "Extinct reptiles with bird-like skulls and chameleon-like adaptations."}, {"n": "Dromaeosauridae", "u": "/e/ancient-reptiles/dromaeosauridae/", "s": "Feathered, swift carnivorous dinosaurs of the Cretaceous period."}, {"n": "Dsungaripterus", "u": "/e/ancient-reptiles/dsungaripterus/", "s": "Early Cretaceous pterosaur with upcurved jaws for crushing shellfish."}, {"n": "Edaphosaurus", "u": "/e/ancient-reptiles/edaphosaurus/", "s": "Early herbivorous synapsid with a distinctive sail and tooth plates."}, {"n": "Edmontosaurus", "u": "/e/ancient-reptiles/edmontosaurus/", "s": "A large duck-billed dinosaur from the end of the Cretaceous."}, {"n": "Effigia", "u": "/e/ancient-reptiles/effigia/", "s": "A toothless, bipedal crocodile relative from the Late Triassic."}, {"n": "Elasmosaurus", "u": "/e/ancient-reptiles/elasmosaurus/", "s": "Long-necked plesiosaur from the Late Cretaceous of North America."}, {"n": "Enantiornithes", "u": "/e/ancient-reptiles/enantiornithes/", "s": "Extinct opposite birds, dominant avialans of the Cretaceous."}, {"n": "Eomaia", "u": "/e/ancient-reptiles/eomaia/", "s": "Early Cretaceous eutherian mammal from China, debated as basal eutherian."}, {"n": "Eoraptor", "u": "/e/ancient-reptiles/eoraptor/", "s": "Early sauropodomorph dinosaur from the Late Triassic of Argentina."}, {"n": "Euharamiyida", "u": "/e/ancient-reptiles/euharamiyida/", "s": "A disputed clade of early mammals or mammal-like cynodonts."}, {"n": "Euoplocephalus", "u": "/e/ancient-reptiles/euoplocephalus/", "s": "A heavily armored ankylosaurid with a tail club from Late Cretaceous Canada."}, {"n": "Euparkeria", "u": "/e/ancient-reptiles/euparkeria/", "s": "A small carnivorous archosauriform from the Triassic of South Africa, close to the ancestry of Archosauria."}, {"n": "Europasaurus", "u": "/e/ancient-reptiles/europasaurus/", "s": "A dwarf sauropod from the Late Jurassic of Germany."}, {"n": "Eutriconodonta", "u": "/e/ancient-reptiles/eutriconodonta/", "s": "Early mammals showing diverse bodyplans and ecological roles."}, {"n": "Feathered dinosaur", "u": "/e/ancient-reptiles/feathered-dinosaur/", "s": "Feathered dinosaurs include all birds and many non-avian species, with evidence from fossils and amber reveali"}, {"n": "Gastornis", "u": "/e/ancient-reptiles/gastornis/", "s": "Extinct giant flightless bird, once thought a predator, now seen as herbivore."}, {"n": "Gorgonops", "u": "/e/ancient-reptiles/gorgonops/", "s": "Extinct genus of gorgonopsian therapsid from the Late Permian."}, {"n": "Gorgonopsia", "u": "/e/ancient-reptiles/gorgonopsia/", "s": "Sabre-toothed therapsid apex predators of the Permian."}, {"n": "Hadrosauridae", "u": "/e/ancient-reptiles/hadrosauridae/", "s": "Duck-billed dinosaurs, dominant Late Cretaceous herbivores."}, {"n": "Halszkaraptor", "u": "/e/ancient-reptiles/halszkaraptor/", "s": "A duck-sized dromaeosaurid with a possible semiaquatic lifestyle."}, {"n": "Hatzegopteryx", "u": "/e/ancient-reptiles/hatzegopteryx/", "s": "Giant azhdarchid pterosaur with a short, powerful neck."}, {"n": "Herrerasaurus", "u": "/e/ancient-reptiles/herrerasaurus/", "s": "One of the earliest dinosaurs, from the Late Triassic of Argentina."}, {"n": "Hesperornis", "u": "/e/ancient-reptiles/hesperornis/", "s": "A large, toothed, flightless seabird from the Cretaceous."}, {"n": "Heterodontosauridae", "u": "/e/ancient-reptiles/heterodontosauridae/", "s": "Basal ornithischian dinosaurs with distinctive tusks and chewing teeth."}, {"n": "Heterodontosaurus", "u": "/e/ancient-reptiles/heterodontosaurus/", "s": "Small dinosaur with three types of teeth."}, {"n": "Hypsilophodon", "u": "/e/ancient-reptiles/hypsilophodon/", "s": "Small, agile herbivore from the Early Cretaceous of England."}, {"n": "Ichthyornis", "u": "/e/ancient-reptiles/ichthyornis/", "s": "Toothed seabird-like ornithuran from the Late Cretaceous."}]