Classification of Gazin 1968

Fm. †Adapidae Trouessart 1879
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G. †Smilodectes Wortman 1903
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†Smilodectes gracilis Marsh 1871
Fm. †Hyopsodontidae Trouessart 1879 [condylarth]
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G. †Hyopsodus Leidy 1870
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†Hyopsodus minusculus Leidy 1873
†Hyopsodus miticulus Cope 1874
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Invalid names: Antiacodon mentalis Cope 1875 [synonym], Hyopsodus latidens Denison 1937 [synonym], Hyopsodus simplex Loomis 1905 [synonym]
Invalid names: Lemuravus Marsh 1875 [synonym], Stenacodon Marsh 1872 [synonym]
G. †Haplomylus Matthew 1915
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†Haplomylus speirianus Cope 1880
G. †Tetraclaenodon Scott 1892
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Invalid names: Protogonia Cope 1881 [synonym]
G. †Tapochoerus McKenna 1959
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†Tapochoerus egressus Stock 1934
†Hyopsodus despiciens Matthew 1909
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Invalid names: Hyopsodus markmani Abel and Cook 1925 [synonym]
†Hyopsodus mentalis Cope 1875
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Invalid names: Hyopsodus lemoinianus Cope 1882 [synonym]
†Hyopsodus paulus Leidy 1870
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Invalid names: Lemuravus distans Marsh 1875 [synonym], Microsyops vicarius Cope 1873 [synonym], Stenacodon rarus Marsh 1872 [synonym]
†Hyopsodus powellianus Cope 1884
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Invalid names: Hyopsodus browni Loomis 1905 [synonym], Hyopsodus jacksoni Loomis 1905 [synonym], Hyopsodus lawsoni Loomis 1905 [synonym]
†Hyopsodus wortmani Osborn 1902
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Invalid names: Hyopsodus minor Loomis 1905 [synonym]
†Tricentes subtrigonus Cope 1881
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Invalid names: Phenacodus zuniensis Cope 1881 [synonym]