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n. A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.

n. A genus of Reptilia, typical of the order Plesiosauria, and formerly conterminous with it, now restricted to forms from the Upper Triassic (Rhætic) and the Liassic, as P. dolichodirus, with extremely long neck.

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

"Mary Anning 1799-1847, the great West Country palaeontologist, struggled for years to have her discoveries – such as the plesiosaurus – recognised as her own."

archosaur    archosaurian    archosaurian reptile   

bizcacha    ichthyosaurus    bice    megatherium    congener