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A new species of Hipparion (Mammalia: Equidae) from the Clarendonian (Miocene) of California

1982; Taylor & Francis; Volume: 2; Issue: 2 Linguagem: Inglês

10.1080/02724634.1982.10011929

1937-2809

Stephen W. Edwards,

Geological and Geochemical Analysis

ABSTRACT A distinctive suite of teeth assignable to the genus Hipparion has been 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 [ = Hipparion 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. The new species Hipparion trampasense is based on the Bolinger Canyon collection.