Classification of Karl et al. 2012

Or. Testudines Batsch 1788 [turtle]
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Subor. Cryptodira Cope 1868
Subfm. †Anosteirinae Lydekker 1889
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G. †Anosteira Leidy 1871
G. †Pseudanosteira Clark 1932
Infraor. Cryptodira Cope 1868
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Superfm. Trionychoidea Fitzinger 1826
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Fm. Carettochelyidae Gill 1889
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Subfm. †Carettochelyinae Boulenger 1887
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G. Carettochelys Ramsay 1886 [pig-nose turtle]
Fm. Trionychidae Gray 1825 [softshell turtle]
Invalid names: Peltochelyidae Seeley 1880 [empty]