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plesiosaur
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Elasmosaurus plesiosaur fossil
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fossil marine reptile
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Also known as: Plesiosauri, Plesiosauria
Article History
Elasmosaurus
Elasmosaurus
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Category: Animals & Nature
Key People:
Mary Anning
Related Topics:
pliosaur
Plesiosaurus
plesiosauroid
Kronosaurus
Elasmosaurus
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plesiosaur, (clade Plesiosauria), any of a group of long-necked marine reptiles found as fossils from the late Triassic Period into the late Cretaceous Period (215 million to 66 million years ago). Plesiosaurs had a wide distribution in European seas and around the Pacific Ocean, including Australia, North America, and Asia. Plesiosaurus, an early plesiosaur, was about 4.5 metres (15 feet) long, with a broad, flat body and a relatively short tail. It swam by flapping its fins in the water, much as sea lions do today, in a modified style of underwater “flight.” The nostrils were located far back on ...(100 of 384 words)

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