Archosauria

class Reptilia, Reptilia - class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals

archosaur, archosaurian, archosaurian reptile - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts

genus Saurosuchus, Saurosuchus - early archosaurian carnivore

genus Proterochampsa, Proterochampsa - early archosaurian carnivore

Crocodilia, Crocodylia, order Crocodilia, order Crocodylia - crocodiles; alligators; caimans; gavials

order Ornithischia, Ornithischia - extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)

order Saurischia, Saurischia - extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)

order Pterosauria, Pterosauria - extinct flying reptiles: pterosaurs

order Thecodontia, Thecodontia - extinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic

Ichthyosauria, order Ichthyosauria - extinct marine reptiles: ichthyosaurs

order Sauropterygia, Sauropterygia - extinct marine reptiles: plesiosaurs; nothosaurs

class - (biology) a taxonomic group containing one or more orders