Classification of Matthew 1915

Fm. †Hyopsodontidae Trouessart 1879 [condylarth]
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G. †Haplomylus Matthew 1915
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†Haplomylus speirianus Cope 1880
G. †Hyopsodus Leidy 1870
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†Hyopsodus mentalis Cope 1875
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Invalid names: Hyopsodus lemoinianus Cope 1882 [synonym]
†Hyopsodus miticulus Cope 1874
†Hyopsodus walcottianus Matthew 1915
G. †Tetraclaenodon Scott 1892
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Or. Artiodactyla Owen 1848 [even-toed ungulate]
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G. †Diacodexis Cope 1882
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Invalid names: Trigonolestes Cope 1894 [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]