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Hipparion trampasense new species mammalia equidae from the clarendonian miocene of california usa

, : Hipparion trampasense new species mammalia equidae from the clarendonian miocene of california usa. Journal of Vertebrate Paleontology 2(2): 173-184

A distinctive suite of teeth assignable to the genus Hipparion was recovered from the Clarendonian (Late Miocene) Contra Costa Group of Bolinger Canyon, Contra Costa County, California. The teeth have been previously compared with Nannippus tehonensis [= H. tehonense (Merriam) MacFadden], a gracile hipparion of southern California and Texas. The Contra Costa fossils share an array of characters in which they differ from H. tehonense. Some of the features suggest possible ancestry to the Neohipparion leptode Merriam or N. eurystyle (Cope) group. H. trampasense sp. nov. is based on the Bolinger Canyon collection.


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