Classification of Persson 1960

G. †Elasmosaurus Cope 1868
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†Elasmosaurus helmerseni Kiprijanoff 1882
Or. Crocodilia Owen 1842 [crocodilian]
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Fm. Crocodilidae Cuvier 1807 [crocodile]
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Subfm. Crocodilinae Cuvier 1807
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G. †Aigialosuchus Persson 1960
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Fm. †Elasmosauridae Cope 1869 [elasmosaur]
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G. †Scanisaurus Persson 1960
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†Scanisaurus nazarowi Bogolubov 1911