Classification of Cope 1874
Subor. Ruminantia Scopoli 1777 [ruminant]
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Invalid names: Poebrotheriidae Cope 1874 [empty]
G. †Hypisodus Cope 1873
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†Leptomeryx evansi Leidy 1853
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Invalid names: Trimerodus cedrensis Cope 1873 [synonym]
†Symborodon trigonoceras Cope 1873
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Invalid names: Brontotherium ingens Marsh 1874 [synonym]