Classification of Granger 1915
†Opisthotomus flagrans Cope 1875
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†Phenacodus sulcatus Cope 1874
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G. †Ectocion Cope 1882
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†Ectocion osbornianus Cope 1882
†Ectocion parvus Granger 1915
†Ectocion ralstonensis Granger 1915
†Ectocion superstes Granger 1915
G. †Meniscotherium Cope 1874
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†Meniscotherium priscum Granger 1915
Invalid names: Hyracops Marsh 1892 [synonym]
G. †Phenacodus Cope 1873
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†Phenacodus astutus Cope 1875
†Phenacodus copei Granger 1915
†Phenacodus intermedius Granger 1915
Invalid names: Eohyus Marsh 1894 [synonym], Opisthotomus Cope 1875 [synonym], Trispondylus Cope 1884 [replaced]
†Meniscotherium chamense Cope 1874
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Invalid names: Meniscotherium terraerubrae Cope 1881 [synonym]
†Phenacodus primaeous Cope 1873
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Invalid names: Eohyus distans Marsh 1894 [synonym], Phenacodus hemiconus Cope 1882 [synonym], Phenacodus nuniensis Cope 1885 [synonym], Phenacodus omnivorus Cope 1874 [synonym], Phenacodus trilobatus Cope 1881 [synonym]