Classification of Osborn 1929
†Canis marshii Hay 1899
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G. †Diploclonus Marsh 1890
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†Diploclonus amplus Marsh 1890
†Diploclonus bicornutus Osborn 1902
†Diploclonus selwynianus Cope 1889
†Diploclonus tyleri Lull 1905
G. †Eotherium Leidy 1853
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G. †Haplacodon Cope 1889
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†Heterotitanops parvus Peterson 1914
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G. †Heterotitanops Peterson 1914
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G. †Leidyotherium Prout 1860
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G. †Limnohyops Marsh 1890
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†Limnohyops laevidens Cope 1873
†Limnohyops laticeps Leidy 1872
†Miobasileus ophryas Cope 1873
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G. †Miobasileus Cope 1873
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†Palaeosyops humilis Leidy 1872
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†Palaeosyops manteoceras Osborn in Matthew 1899
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†Palaeosyops ultimus Matthew 1897
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†Palaeotherium maximum Leidy 1852
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†Rhinoceros americanus Leidy 1852
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G. †Teleodus Marsh 1890
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†Teleodus avus Marsh 1890
†Teleodus primitivus Lambe 1908
Fm. †Brontotheridae Marsh 1873 [brontothere]
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G. †Protitanotherium Osborn 1908
G. †Dolichorhinus Hatcher 1895
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†Dolichorhinus hyognathus Osborn 1889
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Invalid names: Telmatotherium cornutum Osborn 1895 [synonym]
†Dolichorhinus superior Riggs 1912
†Dolichorhinus vallidens Cope 1872
G. †Eotitanops Osborn 1907
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†Eotitanops borealis Cope 1880
†Eotitanops brownianus Cope 1881
G. †Eotitanotherium Peterson 1914
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†Eotitanotherium osborni Peterson 1914
Invalid names: Diploceras Peterson 1914 [synonym]
G. †Megacerops Leidy 1870
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†Megacerops bucco Cope 1873
†Megacerops copei Osborn 1908
Invalid names: Megaceratops Cope 1873 [synonym]
G. †Mesatirhinus Osborn 1908
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†Mesatirhinus junius Leidy 1872
†Mesatirhinus megarhinus Earle 1891
G. †Palaeosyops Leidy 1870
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†Palaeosyops fontinalis Cope 1873
†Palaeosyops longirostris Earle 1892
†Palaeosyops major Leidy 1871
Invalid names: Limnohyus Marsh 1872 [synonym]
G. †Telmatherium Marsh 1872
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†Telmatherium cultridens Osborn et al. 1878
Invalid names: Leurocephalus Osborn et al. 1878 [synonym]
G. †Brontotherium Marsh 1873
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†Brontotherium dolichoceras Scott and Osborn 1887
†Brontotherium hypoceras Cope 1874
†Brontotherium medium Marsh 1891
†Brontotherium platyceras Scott and Osborn 1887
†Brontotherium ramosum Osborn 1896
†Brontotherium tichoceras Scott and Osborn 1887
Invalid names: Titanops Marsh 1887 [synonym]
†Brontotherium gigas Marsh 1873
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Invalid names: Titanops elatus Marsh 1887 [synonym]
G. †Menodus Pomel 1848
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†Menodus giganteus Pomel 1849
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Invalid names: Anisacodon montanus Marsh 1875 [synonym], Brontotherium ingens Marsh 1874 [synonym]
†Menodus heloceras Cope 1873
†Menodus proutii Leidy 1850
†Menodus torvus Cope 1873
†Menodus trigonoceras Cope 1873
†Menodus varians Marsh 1887
Invalid names: Diconodon Marsh 1876 [synonym], Menodus angustigenis Cope 1886 [nomen dubium], Menops Marsh 1887 [synonym], Symborodon Cope 1873 [synonym], Titanotherium Leidy 1852 [synonym]
†Orohippus pumilus Marsh 1871
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Invalid names: Helotherium procyoninum Cope 1871 [synonym]