Classification of Korth 1994
†Akmaiomys incohatus Reeder 1960
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G. †Akmaiomys Reeder 1960
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†Horatiomys montanus Wood 1935
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G. †Horatiomys Wood 1935
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†Poamys rivicola Matthew 1924
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G. †Poamys Matthew 1924
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G. †Ischyromys Leidy 1856
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†Ischyromys douglassi Black 1968
†Ischyromys parvidens Miller and Gidley 1920
†Ischyromys veterior Matthew 1903
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Invalid names: Titanotheriomys wyomingensis Wood 1937 [synonym]
Invalid names: Titanotheriomys Miller and Gidley 1920 [synonym]
Fm. †Cylindrodontidae Miller and Gidley 1918
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Fm. †Reithroparamyidae Wood 1962
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G. Spermophilus Cuvier 1825 [ground squirrel]
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†Spermophilus argonautus Stirton and Goeriz 1942
†Spermophilus finlayensis Strain 1966
†Spermophilus fricki Hibbard 1942
†Spermophilus gidleyi Merriam et al. 1925
†Spermophilus matthewi Black 1963
†Spermophilus pattersoni Wilson 1949
†Spermophilus primitivus Bryant 1945
†Spermophilus shotwelli Black 1963
†Spermophilus wilsoni Shotwell 1956
Invalid names: Otospermophilus Brandt 1844 [synonym]
Fm. †Eutypomyidae Miller and Gidley 1918
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G. †Kansasimys Wood 1936
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†Kansasimys wilsoni Jacobs 1977
Invalid names: Comancheomys Dalquest 1983 [synonym], Ronquillomys Jacobs 1977 [synonym]
Fm. Geomyidae Bonaparte 1845 [pocket gopher]
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G. Pappogeomys Merriam 1895
G. †Progeomys Dalquest 1983
G. †Proheteromys Wood 1932
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†Proheteromys formicarum Wood 1935
†Proheteromys parvus Troxell 1923
Fm. Zapodidae Coues 1875 [jumping mouse]
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G. †Schaubeumys Wood 1935
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†Schaubeumys galbreathi Wilson 1960
†Schaubeumys grangeri Wood 1935
†Schaubeumys sabrae Black 1958
G. †Plesiosminthus Viret 1926
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†Plesiosminthus clivosus Galbreath 1953
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Invalid names: Plesiosminthus geringensis Martin 1974 [synonym]
G. Calomys Waterhouse 1837 [vesper mouse]
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Subg. †Calomys (Bensonomys) Gazin 1942
†Calomys meadensis Hibbard 1956
G. †Mimomys Forsyth-Major 1902
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†Mimomys fricki Hibbard 1972
†Mimomys magilli Hibbard 1972
†Mimomys poaphagus Hibbard 1941
Invalid names: Cosomys Wilson 1932 [synonym], Ogmodontomys Hibbard 1941 [synonym], Ophiomys Hibbard and Zakrzewski 1967 [synonym]
G. Phenacomys Merriam 1889
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Invalid names: Propliophenacomys Martin 1975 [synonym]
†Diplolophus insolens Troxell 1923
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Invalid names: Gidleumys adspectans Wood 1936 [synonym]
†Kansasimys dubius Wood 1936
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Invalid names: Comancheomys rogersi Dalquest 1983 [synonym]
†Nonomys simplicidens Emry and Dawson 1972
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Invalid names: Subsumus candelariae Wood 1974 [synonym]
Phenacomys intermedius Merriam 1889 [western heather vole]
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Invalid names: Propliophenacomys uptegrovensis Martin 1975 [synonym]
†Simimys simplex Wilson 1935
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Invalid names: Eumysops vetus Wilson 1935 [synonym], Simimys murinus Wilson 1949 [synonym]