Classification of Cope 1875
G. †Orycterocetus Leidy 1853
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†Orycterocetus cornutidens Leidy 1856
†Orycterocetus quadratidens Leidy 1853
G. Elephas Linnaeus 1758 [elephant]
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†Elephas americanus Kerr 1792 [American mastodon]
Or. Dinosauria Owen 1842 [dinosaur]
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Or. Sirenia Illiger 1811 [sirenian]
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Unr. Dinosauria Owen 1842 [dinosaur]
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