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Fossil collection records
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Classification of Merriam 1917
G. †
Neohipparion
Gidley 1903
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Neohipparion retrusum
Cope 1889
G. †
Pliohippus
Marsh 1874
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Pliohippus cumminsii
Cope 1893
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Pliohippus spectans
Cope 1880