order Ichthyosauria

Thesaurus

Noun

1.order Ichthyosauria - extinct marine reptiles: ichthyosaursIchthyosauriaanimal order - the order of animalsArchosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodontsichthyosaur - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbsfamily Ichthyosauridae, Ichthyosauridae - later ichthyosaurs of the Jurassic and Cretaceous; widely distributed in both hemispheres