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|Noun||1.||order Thecodontia - extinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic|
animal order - the order of animals
Archosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
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