Classification of Hibbard 1955

Fm. Canidae Fischer de Waldheim 1817 [canid]
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G. Canis Linnaeus 1758 [canine]
Fm. Ursidae Gray 1825 [bear]
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G. †Tremarctotherium Kraglievich 1926
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†Tremarctotherium simum Cope 1879 [giant short-faced bear]
Fm. Geomyidae Bonaparte 1845 [pocket gopher]
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G. Thomomys Wied-Neuwied 1839
Fm. Equidae Gray 1821 [horse]
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G. Equus Linnaeus 1758 [horse]
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Subg. †Equus (Hesperohippus) Hibbard 1955
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†Equus conversidens Owen 1869
Fm. Dasypodidae Gray 1821 [armadillo]
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G. †Holmesina Simpson 1930
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Subg. †Equus (Plesippus) Matthew 1924
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