Classification of Hirayama 1998
Unr. Eucryptodira Gaffney 1975
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Superfm. Chelonioidea Baur 1893 [sea turtle]
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Fm. Cheloniidae Bonaparte 1832
Unr. †Dermochelyoidae Williams 1950
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Fm. Dermochelyidae Lydekker 1889 [leatherback]
Fm. †Protostegidae Cope 1873
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