plesiosaur

Any of various extinct marine reptiles of the group Plesiosauria of the Mesozoic Era, having paddlelike limbs, a short tail, and sometimes a very long neck.

An animal of the order Plesiosauria.

One of the Plesiosauria.

Any of several extinct marine reptiles, of the order Plesiosauria, from the Jurassic and Cretaceous periods

extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous