English > archosaurian: 2 senses > noun 1, animal| Meaning | Extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts. |
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| Synonyms | archosaur, archosaurian reptile |
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| Member of | Archosauria, subclass Archosauria | A large subclass of diapsid reptiles including |
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| Narrower | dinosaur | Any of numerous extinct terrestrial / terrestrial reptiles of the Mesozoic era |
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| ichthyosaur | Any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs |
| nothosaur | Extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming / swimming |
| plesiosaur, plesiosaurus | Extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs |
| pterosaur, flying reptile | 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 |
| Broader | diapsid, diapsid reptile | reptile having a pair of openings in the skull behind each eye |
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| Spanish | archosauria, archosaurian, arcosauro |
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| Catalan | archosauria, arcosaure |
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| Adjectives | archosaurian | of or relating to reptiles of the subclass Archosauria |
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