An extinct order of marine reptiles, including Ichthyosaurus and allied kinds; -- called in addition Ichthyopterygia. They have maybe not been found later on compared to Cretaceous period.
An order of gigantic extinct marine fish-like Reptilia, having somewhat the form of a cetacean mammal, with a massive head, no obvious neck, and a tapering human anatomy, with four paddle-like flippers, and probably a fin-like development regarding the caudal region.
extinct marine reptiles: ichthyosaurs
Definition for "ichthyosauria"
An extinct order of marine reptiles, including Ichthyosaurus…