Classification of Cope and Matthew 1915
G. †Perchoerus Leidy 1869
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†Perchoerus pristinus Leidy 1873
†Perchoerus socialis Marsh 1875
†Perchoerus subaequans Cope 1879
G. †Agriochoerus Leidy 1850
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†Agriochoerus ferox Cope 1879
†Agriochoerus macrocephalus Cope 1879
†Agriochoerus ryderanus Cope 1881
G. †Merychippus Leidy 1856
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†Merychippus sejunctus Cope 1874
†Merychippus sphenodus Cope 1889
G. †Teleoceras Hatcher 1894
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†Teleoceras fossiger Cope 1878
Invalid names: Eusyodon Leidy 1886 [synonym]
G. †Caenopus Cope 1880
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G. †Megalichthys Agassiz 1835
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†Megalichthys nitidus Cope 1880
Invalid names: Palaeobatrachus Tschudi 1839 [synonym]