Classification of Portis 1878

Fm. Emydidae Rafinesque 1815
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G. Chelonoides Agassiz 1857
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†Chelonoides robusta Portis 1878
†Chelonoides wittei Maack 1869
G. †Tropidemys Rütimeyer 1873
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†Tropidemys seebachi Portis 1878
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Invalid names: Stylemys lindensis Maack 1869 [synonym]
Fm. Chelyidae Gray 1869
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G. †Plesiochelys Rütimeyer 1873
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†Plesiochelys minor Portis 1878
G. †Chelonides Maack 1869
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†Chelonides robusta Portis 1878