order Ichthyosauria
Also found in: Thesaurus.
Related to order Ichthyosauria: order Pterosauria, plesiosaurs
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Noun | 1. | ![]() animal order - the order of animals Archosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts ichthyosaur - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs family Ichthyosauridae, Ichthyosauridae - later ichthyosaurs of the Jurassic and Cretaceous; widely distributed in both hemispheres |
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