Classification of Osborn 1902
G. †Leptochoerus Leidy 1856
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†Leptochoerus lemurinus Cope 1874
†Leptochoerus robustus Marsh 1875
G. †Megacerops Leidy 1870
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†Megacerops angustigenis Cope 1886
†Megacerops avus Marsh 1890
†Megacerops bicornutus Osborn 1902
†Megacerops brachycephalus Osborn 1902
†Megacerops marshi Osborn 1902
†Megacerops robustus Marsh 1887
†Megacerops selwynianus Cope 1889
Invalid names: Brontops Marsh 1887 [synonym], Haplacodon Cope 1889 [synonym], Teleodus Marsh 1890 [synonym]
G. †Allops Marsh 1887
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†Allops amplus Marsh 1890
Invalid names: Diploclonus Marsh 1890 [synonym]
G. †Brontotherium Marsh 1873
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†Brontotherium hypoceras Cope 1874
†Brontotherium leidyi Osborn 1902
†Brontotherium platyceras Scott and Osborn 1887
†Brontotherium ramosum Osborn 1896
Invalid names: Titanops Marsh 1887 [synonym]
†Brontotherium curtum Marsh 1887
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Invalid names: Menodus peltoceras Cope 1891 [synonym]
†Brontotherium dolichoceras Scott and Osborn 1887
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Invalid names: Titanops medius Marsh 1891 [synonym]
†Brontotherium gigas Marsh 1873
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Invalid names: Titanops elatus Marsh 1887 [synonym]
G. †Symborodon Cope 1873
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†Symborodon heloceras Cope 1873
†Symborodon montanus Marsh 1875
Invalid names: Diconodon Marsh 1876 [synonym]