archosaur

Noun
  1. Extinct reptiles including: dinosaurs;
    Plesiosaurs;
    Pterosaurs;
    Ichthyosaurs;
    Thecodonts (synset 101698322)
    is a type of: diapsid, diapsid reptile - reptile having a pair of openings in the skull behind each eye
    subtypes:
    • 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
    belongs to: archosauria, subclass archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
    same as: archosaurian, archosaurian reptile

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