Classification of O'Keefe 2004

Superfm. †Cryptocleidoidea Williston 1925
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Fm. †Cimoliasauridae Delair 1959
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G. †Kaiwhekea Cruickshank and Fordyce 2002
G. †Kimmerosaurus Brown 1981
G. †Kimmerosaurus Brown 1981
G. †Kimmerosaurus Brown 1981
G. †Morturneria Chatterjee and Creisler 1994
G. †Muraenosaurus Seeley 1874
Fm. †Polycotylidae Williston 1908
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G. †Dolichorhynchops Williston 1902
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†Dolichorhynchops osborni Williston 1902
G. †Polycotylus Cope 1869
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G. †Trinacromerum Cragin 1888
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G. †Tricleidus Andrews 1909