Classification of Schwermann and Sander 2011
Or. †Plesiosauria de Blainville 1835 [plesiosaur]
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Superfm. †Plesiosauroidea Welles 1943
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Fm. †Plesiosauridae Gray 1825
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G. †Westphaliasaurus Schwermann and Sander 2011
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†Westphaliasaurus simonsensii Schwermann and Sander 2011