Classification of Miller 1976
†Equus occidentalis Leidy 1865
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G. Ondatra Link 1795 [muskrat]
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†Ondatra nebrascensis Hollister 1911
Invalid names: Anaptogonia Cope 1899 [synonym]
G. Sylvilagus Gray 1867 [cottontail rabbit]
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Sylvilagus idahoensis Merriam 1891 [pygmy rabbit]
Invalid names: Brachylagus Lyon 1904 [synonym]
G. †Mammuthus Brookes 1828 [mammoth]
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†Mammuthus columbi Falconer 1857 [Columbian mammoth]
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Invalid names: Elephas jeffersonii Osborn 1922 [synonym]
†Mammuthus imperator Leidy 1858 [imperial mammoth]
Invalid names: Parelephas Osborn 1924 [synonym]
Canis lupus Linnaeus 1758 [gray wolf]
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Invalid names: Canis armbrusteri Gidley 1913 [synonym], Canis milleri Merriam 1912 [synonym], Canis occidentalis Richardson 1829 [synonym]
†Ondatra annectens Brown 1908
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Invalid names: Ondatra kansasensis Hibbard 1944 [synonym]