Classification of Macdonald 1970
Fm. Amphisbaenidae Gray 1865 [worm lizard]
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Fm. Talpidae Fischer de Waldheim 1817 [mole]
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Fm. †Omomyidae Gazin 1958
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G. †Dinictis Leidy 1854
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†Dinictis eileenae Macdonald 1970
†Dinictis platycopis Cope 1879
Invalid names: Pogonodon Cope 1880 [synonym]
G. †Promartes Riggs 1942
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†Promartes gemmarosae Loomis 1932
†Promartes lepidus Matthew 1907
G. †Hesperocyon Scott 1890
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†Hesperocyon angustidens Marsh 1871
†Hesperocyon gregarius Cope 1873
†Hesperocyon gregorii Matthew 1907
†Hesperocyon leptodus Schlaikjer 1935
†Hesperocyon paterculus Matthew 1903
Invalid names: Pseudocynodictis Schlosser 1902 [synonym]
G. †Nothocyon Wortman and Matthew 1899
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†Nothocyon geismarianus Cope 1878
†Nothocyon latidens Cope 1881
†Nothocyon lemur Cope 1879
†Nothocyon minor Matthew 1907
G. †Sunkahetanka Macdonald 1963
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†Sunkahetanka geringensis Barbour and Schultz 1935
G. †Brachyrhynchocyon Scott and Jepsen 1936
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†Brachyrhynchocyon douglasi Macdonald 1970
Fm. †Allomyidae Marsh 1877
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Fm. †Mylagaulidae Cope 1881
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G. †Capacikala Macdonald 1963
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†Capacikala gradatus Cope 1878
†Capacikala sciuroides Matthew 1907
G. †Capatanka Macdonald 1963
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G. †Palaeocastor Leidy 1869
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†Palaeocastor nebrascensis Leidy 1856
†Palaeocastor simplicidens Matthew 1907
Fm. †Florentiamyidae Wood 1936
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G. †Sanctimus Macdonald 1970
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†Sanctimus clasoni Macdonald 1963
†Sanctimus stuartae Macdonald 1970
†Sanctimus tiptoni Macdonald 1970
G. †Gregorymys Wood 1936
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†Gregorymys curtus Matthew 1907
†Gregorymys formosus Matthew 1907
G. †Archaeolagus Dice 1917
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†Archaeolagus macrocephalus Matthew 1907
†Archaeolagus primigenius Matthew 1907
G. †Desmatochoerus Thorpe 1921
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†Desmatochoerus curvidens Thorpe 1921
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Invalid names: Promerycochoerus gregoryi Loomis 1924 [synonym]
†Desmatochoerus hatcheri Douglass 1907
Invalid names: Hypselochoerus Loomis 1933 [synonym]
G. †Parahippus Leidy 1858
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†Parahippus pristinus Osborn 1918
†Parahippus texanus Leidy 1868
Invalid names: Anchippus Leidy 1868 [synonym]
†Merychyus minimus Peterson 1907
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Invalid names: Merychyus delicatus Loomis 1924 [synonym]
G. †Promerycochoerus Douglass 1901
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†Promerycochoerus minor Douglass 1903
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Invalid names: Promerycochoerus pygmyus Loomis 1924 [synonym]