Classification of Watson 1909

Or. †Plesiosauria de Blainville 1835 [plesiosaur]
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G. †Microcleidus Watson 1909
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G. †Sthenarosaurus Watson 1909
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†Sthenarosaurus dawkinsi Watson 1909
G. †Plesiosaurus de la Beche and Conybeare 1821
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†Plesiosaurus longirostris Tate and Blake 1876
†Plesiosaurus macropterus Seeley 1865
†Plesiosaurus propinquus Tate and Blake 1876
G. †Rhomaleosaurus Seeley 1874
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†Rhomaleosaurus cramptoni Carte and Baily 1863