Classification of Gunnell 1998
†Oxyaenodon wortmani Van Valen 1966
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†Proviverra americana Scott 1892
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†Sinopa eximia Leidy 1873
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†Stypolophus insectivorus Cope 1871
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†Triacodon nanus Marsh 1872
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Subcl. Eutheria Huxley 1880 [eutherian]
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Fm. †Hyaenodontidae Leidy 1869
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G. †Acarictis Gingerich and Deutsch 1989
G. †Hemipsalodon Cope 1885
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G. †Prototomus Cope 1874
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†Prototomus robustus Matthew and Granger 1915
†Prototomus viverrinus Cope 1874
G. †Pyrocyon Gingerich and Deutsch 1989
G. †Sinopa Leidy 1871
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Invalid names: Stypolophus Cope 1871 [synonym], Triacodon Marsh 1871 [synonym]
G. †Arfia Van Valen 1965
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†Arfia opisthotoma Matthew 1901
†Arfia shoshoniensis Matthew and Granger 1915
G. †Hyaenodon Laizer and Parieu 1838
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Invalid names: Neohyaenodon Thorpe 1922 [synonym], Pseudopterodon Schlosser 1887 [synonym]
G. †Tritemnodon Matthew 1906
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†Tritemnodon strenuus Cope 1875
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Invalid names: Stypolophus hians Cope 1877 [synonym], Stypolophus whitiae Cope 1882 [synonym]
Fm. †Oxyaenidae Cope 1877
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G. †Apataelurus Scott 1937
G. †Dipsalidictis Matthew and Granger 1915
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†Dipsalidictis aequidens Matthew and Granger 1915
†Dipsalidictis platypus Matthew and Granger 1915
†Dipsalidictis transiens Matthew and Granger 1915
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Invalid names: Dipsalidictis amplus Jepsen 1930 [synonym]
Invalid names: Dipsalidictides Denison 1938 [synonym]
G. †Dipsalodon Jepsen 1930
G. †Galethylax Gervais 1850
G. †Machaeroides Matthew 1909
G. †Oxyaena Cope 1874
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†Oxyaena lupina Cope 1874
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Invalid names: Oxyaena huerfanensis Osborn 1897 [synonym], Oxyaena morsitans Cope 1874 [synonym]
†Oxyaena pardalis Matthew and Granger 1915
G. †Palaeonictis de Blainville 1842
G. †Patriofelis Leidy 1870
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†Patriofelis ferox Marsh 1872
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Invalid names: Aelurotherium bicuspis Wortman 1901 [synonym], Limnofelis latidens Marsh 1872 [synonym], Patriofelis leidyanus Osborn and Wortman 1892 [synonym]
Invalid names: Aelurotherium Adams 1896 [synonym], Limnofelis Marsh 1872 [synonym], Oreocyon Marsh 1872 [synonym]
G. †Sarkastodon Granger 1938
†Ambloctonus sinosus Cope 1875
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Invalid names: Ambloctonus hyaenoides Matthew and Granger 1915 [synonym]
†Hyaenodon crucians Leidy 1853
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Invalid names: Hyaenodon leptocephalus Scott 1888 [synonym], Hyaenodon minutus Douglass 1902 [synonym], Hyaenodon paucidens Osborn and Wortman 1894 [synonym]
†Hyaenodon venturae Mellett 1977
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Invalid names: Hyaenodon exiguus Stock 1933 [synonym]
†Hyaenodon vetus Stock 1933
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Invalid names: Pterodon californicus Stock 1933 [synonym]
†Limnocyon potens Matthew 1909
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Invalid names: Limnocyon douglassi Peterson 1919 [synonym]
†Oodectes herpestoides Wortman 1901
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Invalid names: Paeneprolimnocyon amissadomus Guthrie 1967 [synonym]
†Oodectes jepseni Guthrie 1967
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Invalid names: Paeneprolimnocyon iudei Guthrie 1967 [synonym]
†Oxyaena forcipata Cope 1874
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Invalid names: Oxyaena ultima Denison 1938 [synonym]
†Patriofelis ulta Leidy 1870
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Invalid names: Patriofelis coloradensis Matthew 1909 [synonym], Patriofelis compressa Denison 1938 [synonym]
†Prolimnocyon antiquus Matthew and Granger 1915
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Invalid names: Prolimnocyon elisabethae Gazin 1952 [synonym]
†Sinopa major Wortman 1902
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Invalid names: Sinopa grangeri Matthew 1906 [synonym]
†Sinopa rapax Leidy 1871
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Invalid names: Sinopa minor Wortman 1902 [synonym], Stypolophus aculeatus Cope 1872 [synonym], Stypolophus pungens Cope 1872 [synonym], Triacodon fallax Marsh 1871 [synonym]