Classification of Dalquest and Schultz 1992
†Auchenia vitakeriana Cope 1878
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†Camelops kansanus Leidy 1854
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G. †Holomeniscus Cope 1884
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†Protocamelus virginiensis Leidy 1873
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†Tapirus haysii Leidy 1860
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G. Sorex Linnaeus 1758 [long-tailed shrew]
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Sorex hoyi Baird 1858 [American pygmy shrew]
†Sorex lacustris Hibbard 1944
†Sorex minutus Brown 1908
†Sorex pratensis Hibbard 1944
Invalid names: Microsorex Baird 1877 [synonym], Neosorex Baird 1857 [synonym]
G. Acinonyx Brookes 1828 [cheetah]
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†Acinonyx studeri Savage 1960
†Acinonyx trumani Orr 1969
G. †Smilodon Lund 1841 [saber-toothed cat]
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†Smilodon fatalis Leidy 1868
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Invalid names: Machaerodus floridanus Leidy 1889 [synonym], Smilodon californicus Bovard 1907 [synonym], Smilodon nebraskensis Matthew 1918 [synonym], Smilodon trinitiensis Slaughter 1960 [synonym], Smilodontopsis conardi Brown 1908 [synonym], Smilodontopsis troglodytes Brown 1908 [synonym]
Invalid names: Trucifelis Leidy 1869 [synonym]
G. Spermophilus Cuvier 1825 [ground squirrel]
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Spermophilus elegans Kennicott 1863 [Wyoming ground squirrel]
G. Geomys Rafinesque 1817
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Geomys bursarius Shaw 1800 [plains pocket gopher]
†Geomys tobinensis Hibbard 1944
Invalid names: Parageomys Hibbard 1944 [synonym]
G. Chaetodipus Merriam 1889 [pocket mouse]
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Chaetodipus hispidus Baird 1858 [hispid pocket mouse]
G. Peromyscus Gloger 1841 [deer mouse]
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Peromyscus leucopus Rafinesque 1818 [white-footed mouse]
G. Equus Linnaeus 1758 [horse]
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†Equus giganteus Gidley 1901
Invalid names: Equus semiplicatus Cope 1893 [nomen dubium]
G. †Mammuthus Brookes 1828 [mammoth]
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†Mammuthus imperator Leidy 1858 [imperial mammoth]
Bison bison Linnaeus 1758 [American bison]
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Invalid names: Bison occidentalis Lucas 1898 [synonym]
Canis rufus Audubon and Bachman 1851 [red wolf]
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Invalid names: Canis priscolatrans Cope 1899 [synonym]
†Onychomys pedroensis Gidley 1922
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Invalid names: Onychomys fossilis Hibbard 1941 [synonym], Onychomys jinglebobensis Hibbard 1955 [synonym]