Classification of Holroyd and Hutchison 2002

Fm. †Nanhsiungchelyidae Yeh 1966
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G. †Basilemys Hay 1902
Unr. Cryptodira Cope 1868
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Fm. †Adocidae Cope 1869
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G. †Adocus Cope 1868
Fm. †Baenidae Cope 1882
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Invalid names: Baeninae Cope 1882 [empty], Neurankylinae [empty]
Fm. Chelydridae Swainson 1839
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G. †Emarginochelys Whetstone 1978
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†Emarginochelys cretacea Whetstone 1978
G. †Protochelydra Erickson 1973
Fm. †Macrobaenidae Sukhanov 1964
Fm. †Pleurosternidae Cope 1868
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G. †Compsemys Leidy 1856
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†Compsemys victa Leidy 1856
Fm. Trionychidae Gray 1825 [softshell turtle]
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Subfm. †Plastomeninae Hay 1902
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G. †Helopanoplia Hay 1908
Subfm. Trionychinae Gray 1825 [softshell turtle]
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G. Apalone Rafinesque 1832 [softshell turtle]
G. Aspiderites Hay 1904
Invalid names: Kinosternoidae Holroyd and Hutchison 2002 [empty]