Classification of Scott and Osborn 1887
G. †Eucrotaphus Leidy 1850
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G. †Hyracodon Leidy 1856
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†Hyracodon major Scott and Osborn 1887
†Hyracodon nebrascense Leidy 1850
†Hyracodon planiceps Scott and Osborn 1887
Fm. †Amynodontidae Scott and Osborn 1883
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G. †Amynodon Marsh 1877
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Invalid names: Orthocynodon Scott and Osborn 1882 [synonym]
Fm. †Menodontidae Cope 1881
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G. †Menodus Pomel 1848
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†Menodus coloradensis Leidy 1870
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Invalid names: Brontotherium ingens Marsh 1874 [synonym], Symborodon trigonoceras Cope 1873 [synonym]
†Menodus dolichoceras Scott and Osborn 1887
†Menodus platyceras Scott and Osborn 1887
†Menodus tichoceras Scott and Osborn 1887
Invalid names: Brontotherium Marsh 1873 [synonym], Diconodon Marsh 1876 [synonym], Megacerops Leidy 1870 [synonym], Symborodon Cope 1873 [synonym], Titanotherium Leidy 1852 [synonym]