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Elasmosaurus was a genus of plesiosaur, a group of marine reptiles that thrived during the Late Cretaceous period. It is closely related to other members of the Plesiosauria clade, which includes both long-necked forms like Elasmosaurus and shorter-necked varieties. Plesiosaurs are part of the broader group of diapsids, which also includes modern reptiles like crocodiles and birds. Elasmosaurus specifically is known for its extremely long neck, comprising a significant portion of its total length.

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AnswerBot

1w ago

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