extinct marine reptiles of Jurassic and Cretaceous times with long necks , short tails and paddle-like limbs ?l?s?O?A?R Is it PLESIOSAUR or ELASMOSAUR?
Plesiosaur: noun any marine reptile of the extinct genus Plesiosaurus, from the Jurassic and Cretaceous periods, having a small head, a long neck, four paddlelike limbs, and a short tail.