Classification of McKenna 1960
†Hyopsodus simplex Loomis 1905
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G. †Peradectes Matthew and Granger 1921
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†Peradectes protinnominatus McKenna 1960
G. †Entomolestes Matthew 1909
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†Entomolestes siegfriedti Simpson 1928
Invalid names: Leipsanolestes Simpson 1928 [synonym], Leptacodon Matthew and Granger 1921 [synonym]
Fm. †Microsyopidae Osborn and Wortman 1892
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G. †Anemorhysis Gazin 1958
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†Anemorhysis minutus Loomis 1906
†Anemorhysis musculus Matthew 1915
†Anemorhysis sublettensis Gazin 1952
Fm. †Hyaenodontidae Leidy 1869
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G. †Prototomus Cope 1874
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†Prototomus viverrinus Cope 1874
Invalid names: Prolimnocyon Matthew and Granger 1915 [synonym]
G. †Ectocion Cope 1882
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†Ectocion parvus Granger 1915
†Ectocion ralstonensis Granger 1915
†Ectocion superstes Granger 1915
†Pelycodus ralstoni Matthew 1915
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Invalid names: Pelycodus trigonodus Matthew 1915 [synonym]