archosaurian reptile
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Noun | 1. | ![]() diapsid, diapsid reptile - reptile having a pair of openings in the skull behind each eye Archosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era flying reptile, pterosaur - an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb thecodont, thecodont reptile - presumably in the common ancestral line to dinosaurs and crocodiles and birds ichthyosaur - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs plesiosaur, plesiosaurus - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous nothosaur - extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming |
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