Classification of MacFadden 1984
Fm. Equidae Gray 1821 [horse]
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G. †Hipparion de Christol 1832
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†Hipparion forcei Richey 1948
†Hipparion shirleyi MacFadden 1984
†Hipparion tehonense Merriam 1916
Invalid names: Hipparion sanfondensis Frick 1933 [nomen nudum], Hipparion sanjuanensis Frick 1933 [nomen nudum]
G. †Nannippus Matthew 1926
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†Nannippus beckensis Dalquest and Donovan 1973
†Nannippus minor Sellards 1916
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Invalid names: Hippotherium venustum Leidy 1853 [synonym], Nannippus aztecus Mooser 1968 [synonym]
†Nannippus peninsulatus Cope 1885
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Invalid names: Equus minutus Cope 1893 [synonym], Equus phlegon Hay 1899 [synonym], Hipparion cragini Hay 1917 [synonym], Nannippus hesperides Mooser 1968 [synonym]
G. †Neohipparion Gidley 1903
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†Neohipparion affine Leidy 1869
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Invalid names: Hipparion dolichops Gidley 1906 [synonym], Neohipparion whitneyi Gidley 1903 [synonym]
†Neohipparion coloradense Osborn 1918
†Neohipparion eurystyle Cope 1893
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Invalid names: Hesperohipparion stirtoni Dalquest 1981 [synonym], Hipparion phosphorum Simpson 1930 [synonym], Neohipparion arellanoi Stirton 1955 [synonym], Neohipparion floresi Stirton 1955 [synonym], Neohipparion molle Merriam 1915 [synonym], Neohipparion monias Mooser 1963 [synonym], Neohipparion otomii Mooser 1959 [synonym]
†Neohipparion gidleyi Merriam 1915
†Neohipparion leptode Merriam 1915
†Neohipparion trampasense Edwards 1982
Invalid names: Hesperohipparion Dalquest 1981 [synonym]
G. †Cormohipparion Skinner and MacFadden 1977
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†Cormohipparion goorisi MacFadden and Skinner 1981
†Cormohipparion occidentale Leidy 1856
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Invalid names: Hipparion mohavense Merriam 1913 [synonym], Hipparion mohavense callodonte Merriam 1915 [synonym], Hipparion platystyle Merriam 1915 [synonym]
†Cormohipparion sphenodus Cope 1889
Tr. †Hipparionini Quinn 1955 [hipparionine horse]
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Invalid names: Hipparion anthonyi Merriam 1916 [nomen dubium], Hipparion condoni Merriam 1915 [nomen dubium], Hippotherium montezuma Leidy 1882 [nomen dubium], Hippotherium rectidens Cope 1886 [nomen dubium], Hippotherium sinclairi Wortman 1882 [nomen dubium]