Classification of Gazin 1976
G. †Peratherium Aymard 1850
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†Peratherium marsupium Troxell 1923
Invalid names: Herpetotherium Cope 1873 [synonym]
G. †Apatemys Marsh 1872
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†Apatemys bellulus Marsh 1872
†Apatemys rodens Troxell 1923
G. †Palaeictops Matthew 1899
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†Palaeictops bicuspis Cope 1880
†Palaeictops bridgeri Simpson 1959
G. †Pantolestes Cope 1872
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†Pantolestes elegans Marsh 1872
†Pantolestes longicaudus Cope 1872
Invalid names: Anisacodon Marsh 1872 [synonym]
Fm. †Dormaaliidae Quinet 1964
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G. †Scenopagus McKenna and Simpson 1959
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†Scenopagus edenensis McGrew et al. 1959
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Invalid names: Scenopagus mcgrewi McKenna and Simpson 1959 [synonym]
G. †Centetodon Marsh 1872
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†Centetodon bacchanalis McGrew et al. 1959
Invalid names: Hypacodon McKenna 1960 [synonym]
G. †Nyctitherium Marsh 1872
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†Nyctitherium dasypelix Matthew 1909
Invalid names: Myolestes Matthew 1909 [synonym], Nyctilestes Marsh 1872 [synonym]
G. †Trogosus Leidy 1871
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†Trogosus hyracoides Marsh 1873
†Trogosus latidens Marsh 1874
Invalid names: Tillotherium Marsh 1873 [synonym]
G. †Uintatherium Leidy 1872
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†Uintatherium anceps Marsh 1871
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Invalid names: Dinoceras mirabile Marsh 1872 [synonym], Uintamastix atrox Leidy 1872 [synonym], Uintatherium robustum Leidy 1872 [synonym]
Invalid names: Dinoceras Marsh 1872 [synonym], Uintamastix Leidy 1872 [synonym]
G. †Microsyops Leidy 1872
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†Microsyops annectens Marsh 1872
†Microsyops schlosseri Wortman 1903
Fm. †Adapidae Trouessart 1879
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G. †Uintanius Matthew 1915
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Fm. †Limnocyonidae
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G. †Limnocyon Marsh 1872
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G. †Patriofelis Leidy 1870
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†Patriofelis ferox Marsh 1872
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Invalid names: Aelurotherium latidens Marsh 1872 [synonym], Limnofelis latidens Marsh 1872 [synonym]
Invalid names: Limnofelis Marsh 1872 [synonym], Oreocyon Marsh 1872 [synonym]
G. †Miacis Cope 1872
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†Miacis hargeri Wortman 1901
†Miacis sylvestris Marsh 1872
Invalid names: Harpalodon Marsh 1872 [synonym]
G. †Microparamys Wood 1959
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†Microparamys minutus Wilson 1937
†Microparamys wyomingensis Wood 1959
G. †Antiacodon Marsh 1872
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†Antiacodon pygmaeus Cope 1872
†Antiacodon venustus Marsh 1872
G. †Helohyus Marsh 1872
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†Helohyus lentus Marsh 1871
†Helohyus validus Marsh 1872
G. †Synoplotherium Cope 1872
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†Synoplotherium vorax Marsh 1876
Invalid names: Dromocyon Marsh 1876 [synonym]
G. †Orohippus Marsh 1872
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†Orohippus pumilus Marsh 1871
†Orohippus sylvaticus Leidy 1870
Invalid names: Helohippus Marsh 1892 [synonym]
G. †Palaeosyops Leidy 1870
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†Palaeosyops major Leidy 1871
Invalid names: Limnohyus Marsh 1872 [synonym]
G. †Telmatherium Marsh 1872
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†Telmatherium cultridens Osborn et al. 1878
Invalid names: Leurocephalus Osborn et al. 1878 [synonym], Telmatotherium Marsh 1872 [synonym]
Superfm. Tapiroidea Gill 1872
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G. †Hyrachyus Leidy 1871
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†Hyrachyus affinis Marsh 1871
†Hyrachyus modestus Leidy 1870
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Invalid names: Hyrachyus agrarius Leidy 1871 [synonym], Hyrachyus agrestis Leidy 1871 [synonym]
†Centetodon pulcher Marsh 1872
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Invalid names: Hypacodon praecursor McKenna 1960 [synonym]
G. †Cynodontomys Cope 1882
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†Cynodontomys knightensis Gazin 1952
†Cynodontomys latidens Cope 1882
†Notharctus robustior Leidy 1872
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Invalid names: Telmalestes crassus Marsh 1872 [synonym]
†Sinopa major Wortman 1902
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Invalid names: Sinopa grangeri Matthew 1906 [synonym]
†Thinocyon mustelinus Matthew 1909
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Invalid names: Thinocyon minimus Matthew 1909 [synonym]