Classification of Leidy 1870

Fm. †Adapidae Trouessart 1879
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G. †Notharctus Leidy 1870
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Notharctus tenebrosus Leidy 1870
Or. Artiodactyla Owen 1848 [even-toed ungulate]
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G. †Microsus Leidy 1870
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Microsus cuspidatus Leidy 1870
Fm. †Brontotheridae Marsh 1873 [brontothere]
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G. †Palaeosyops Leidy 1870
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Palaeosyops paludosus Leidy 1870