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File:North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus13.png

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English: North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus
Date
Source American Journal of Science
Author Samuel Wendell Williston

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current19:16, 18 August 2014Thumbnail for version as of 19:16, 18 August 20142,967 × 5,158 (1.96 MB)Abyssal (talk | contribs)User created page with UploadWizard

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