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April 17, 2018 at 12:26 pm
#34737
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Definitely mammal. To me it looks like it comes from the Oligocene horse genus Mesohippus, or from Merycoidodon, the most common genus of oreodont mammal. The white bone and brown tooth preservation looks identical to mammal fossils found in the White River Formations of South Dakota, North Dakota, Wyoming, and Nebraska. Do know where the specimen is from?