Classification of Voorhies 1990

†Machaerodus niobrarensis Thorpe 1922
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G. †Megalomeryx Leidy 1858
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G. †Barbourofelis Schultz et al. 1970
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†Barbourofelis whitfordi Barbour and Cook 1915
G. †Leptarctus Leidy 1856
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Invalid names: Hypsoparia Dorr 1954 [synonym]
G. Martes Frisch 1775 [marten]
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†Martes parviloba Cope 1873
G. †Sthenictis Peterson 1910
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Invalid names: Brachygale Peterson 1910 [synonym]
G. †Carpocyon Webb 1969
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†Carpocyon cuspidatus Thorpe 1922
G. †Epicyon Leidy 1858
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†Epicyon haydeni Leidy 1858
†Epicyon saevus Leidy 1858
G. †Leptocyon Matthew 1918
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†Leptocyon vafer Leidy 1858
G. †Tomarctus Cope 1873
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†Tomarctus euthos McGrew 1935
†Tomarctus temerarius Leidy 1858
Fm. Procyonidae Gray 1825 [procyonid carnivore]
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G. †Probassariscus Merriam 1911
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†Probassariscus antiquus Matthew and Cook 1909
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Invalid names: Bassariscus nevadensis Merriam 1916 [synonym], Bassariscus parvus Hall 1927 [synonym]
G. †Eucastor Allen 1877
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†Eucastor pansus Cope 1874
†Eucastor tortus Leidy 1858
G. †Hystricops Leidy 1858
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†Hystricops venustus Leidy 1858
G. †Anchitheriomys Roger 1885
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†Anchitheriomys fluminis Matthew 1918
Invalid names: Amblycastor Matthew 1918 [synonym]
Fm. Cricetidae Fischer von Waldheim 1817
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G. †Goniodontomys Wilson 1937
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†Goniodontomys disjunctus Wilson 1937
G. †Prosomys Shotwell 1956
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†Prosomys mimus Shotwell 1956
G. †Tregomys Wilson 1968
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†Tregomys shotwelli Wilson 1968
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Invalid names: Gnomomys saltus Wilson 1968 [synonym]
Invalid names: Gnomomys Wilson 1968 [synonym]
G. †Copemys Wood 1936
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†Copemys niobrariensis Hoffmeister 1959
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Invalid names: Peromyscus kelloggae Hoffmeister 1959 [synonym]
Invalid names: Miochomys Hoffmeister 1959 [synonym]
G. †Dyseohyus Stock 1937
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†Dyseohyus xiphodonticus Barbour 1925
G. †Aepycamelus Macdonald 1956
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†Aepycamelus robustus Leidy 1858
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Invalid names: Homocamelus caninus Leidy 1869 [synonym], Procamelus madisonius Douglass 1899 [synonym]
Invalid names: Homocamelus Leidy 1869 [synonym]
G. †Bouromeryx Skinner et al. 1977
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†Bouromeryx americanus Douglass 1899
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Invalid names: Barbouromeryx nebrascensis Frick 1937 [synonym], Barbouromeryx pseudonebrascensis Frick 1937 [synonym], Barbouromeryx supernebrascensis Frick 1937 [synonym], Dromomeryx parvus Cook 1922 [synonym], Palaeomeryx madisonius Douglass 1899 [synonym]
†Bouromeryx milleri Frick 1937
†Bouromeryx pawniensis Frick 1937
†Bouromeryx submilleri Frick 1937
Fm. Antilocapridae Gray 1866 [pronghorn]
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G. †Plioceros Frick 1937
G. †Ramoceros Frick 1937
G. †Submeryceros Frick 1937
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†Submeryceros crucianus Frick 1937
†Submeryceros minimus Frick 1937
†Submeryceros minor Frick 1937
G. †Merycodus Leidy 1854
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†Merycodus furcatus Leidy 1869
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Invalid names: Cosoryx burgensis Frick 1937 [synonym]
†Merycodus joraki Frick 1937
†Merycodus major Frick 1937
†Merycodus warreni Leidy 1858
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Invalid names: Meryceros nenzelensis Frick 1937 [synonym]
Invalid names: Meryceros Frick 1937 [synonym]
G. †Sphenophalos Merriam 1909
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†Sphenophalos floblairi Frick 1937
G. †Calippus Matthew and Stirton 1930
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†Calippus placidus Leidy 1869
G. †Megahippus McGrew 1938
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†Megahippus matthewi Barbour 1914
G. †Pliohippus Marsh 1874
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†Pliohippus mirabilis Leidy 1858
†Pliohippus pernix Marsh 1874
†Pliohippus supremus Leidy 1869
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Invalid names: Pliohippus robustus Marsh 1874 [synonym]
G. †Pseudhipparion Ameghino 1904
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†Pseudhipparion gratum Leidy 1869
G. †Peraceras Cope 1880
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†Peraceras crassus Leidy 1858
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Invalid names: Aphelops ceratorhinus Douglass 1903 [synonym]
G. †Teleoceras Hatcher 1894
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†Teleoceras major Hatcher 1894
G. †Amebelodon Barbour 1927
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G. †Gomphotherium Burmeister 1837
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†Gomphotherium lulli Barbour 1914
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Invalid names: Trilophodon phippsi Cook 1928 [synonym]
†Gomphotherium osborni Barbour 1916
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Invalid names: Tetrabelodon willistoni Barbour 1914 [synonym], Trilophodon abeli Barbour 1925 [synonym], Trilophodon gregorii Frick 1933 [synonym]
G. †Torynobelodon Barbour 1929
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†Aelurodon ferox Leidy 1858
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Invalid names: Aelurodon platyrhinus Barbour and Cook 1917 [synonym]
†Amebelodon fricki Barbour 1927
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Invalid names: Amebelodon sinclairi Barbour 1930 [synonym]
†Aphelops mutilus Matthew 1924
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Invalid names: Aphelops kimballensis Tanner 1967 [synonym]
†Blastomeryx gemmifer Cope 1874
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Invalid names: Blastomeryx mefferdi Frick 1937 [synonym]
†Cranioceras unicornis Matthew 1918
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Invalid names: Cranioceras granti Frick 1937 [synonym]
G. †Cseria
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†Cseria parkeri Martin 1975
†Daphoenodon superbus Peterson 1907
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Invalid names: Daphoenodon niobrarensis Loomis 1936 [synonym]
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Invalid names: Domninoides storeri Russell 1976 [synonym]
†Longirostromeryx wellsi Matthew 1904
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Invalid names: Longirostromeryx merriami Frick 1937 [synonym]
†Parahippus cognatus Leidy 1858
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Invalid names: Neohipparion niobrarense Gidley 1906 [synonym]
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Invalid names: Peraceras troxelli Matthew 1918 [synonym]
†Pseudoceras skinneri Frick 1937
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Invalid names: Pseudoceras potteri Frick 1937 [synonym]
†Ramoceros osborni Matthew 1904
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Invalid names: Ramoceros (Paramoceros) howardae Frick 1937 [synonym], Ramoceros (Paramoceros) kansanus Frick 1937 [synonym], Ramoceros hitchcockensis Frick 1937 [synonym]
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Invalid names: Stegomastodon primitivus Osborn 1936 [synonym]
†Teleoceras fossiger Cope 1878
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Invalid names: Teleoceras schultzi Tanner 1975 [synonym]
†Teleoceras medicornutum Osborn 1904
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Invalid names: Teleoceras minor Olcott 1909 [synonym]
G. †Ustatochoerus Schultz and Falkenbach 1941
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†Ustatochoerus major Leidy 1858
†Ustatochoerus medius Leidy 1858