Ichthyosauria

Ich`thy`o`sau´ri`a

n. pl.

1.

(Paleon.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; - called also Ichthyopterygia. They have not been found later than the Cretaceous period.

Thesaurus

Noun

1.

Ichthyosauria - extinct marine reptiles: ichthyosaurs order Ichthyosauria 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