Classification of Quinn 1955

Or. Perissodactyla Owen 1848 [odd-toed ungulate]
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Fm. Equidae Gray 1821 [horse]
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Subfm. †Anchitheriinae Leidy 1869 [anchitheriine horse]
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G. †Archaeohippus Gidley 1906
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Archaeohippus ultimus Cope 1886
Subfm. Equinae Steinmann and Döderlein 1890
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Tr. Equini Quinn 1955 [horse]
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G. †Asinus Gray 1822
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Asinus cumminsii Cope 1893
Asinus francisci Hay 1915
Asinus mexicanus Lance 1950
G. †Dinohippus Quinn 1955
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Dinohippus leidyanus Osborn 1918
Dinohippus subvenus Quinn 1955
G. †Eoequus Quinn 1955
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Eoequus wilsoni Quinn 1955
G. Equus Linnaeus 1758 [horse]
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Equus caballus Linnaeus 1758 [horse]
Equus laparensis Quinn 1955
G. †Hippotigris Hamilton-Smith 1841
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Hippotigris burchelli Gray 1824 [Burchell's zebra]
Hippotigris capensis Broom 1909
Hippotigris grevyi Oustalet 1882
Hippotigris osborni Frick 1921
Hippotigris parastylus Quinn 1955
Hippotigris sellardsi Quinn 1955
Hippotigris shoshonensis Gidley 1930
Hippotigris zebra Linnaeus 1758 [mountain zebra]
Tr. †Hipparionini Quinn 1955 [hipparionine horse]
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G. †Hipparion de Christol 1832
G. †Merychippus Leidy 1856
G. †Nannippus Matthew 1926
G. †Neohipparion Gidley 1903
Invalid names: Calippini Quinn 1955 [empty], Protohippini Quinn 1955 [empty]