Classification of Cruickshank 1994
Or. †Plesiosauria de Blainville 1835 [plesiosaur]
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Superfm. †Plesiosauroidea Welles 1943
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Fm. †Pliosauridae Seeley 1874
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G. †Rhomaleosaurus Seeley 1874
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†Rhomaleosaurus cramptoni Carte and Baily 1863
†Rhomaleosaurus megacephalus Stutchbury 1846