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TITLE: Arctodus simus (Cope, 1879) from Riverside County, California
AUTHOR: Eric Scott and Shelley M. Cox
JOURNAL: PaleoBios
PUBLISHED: May 24, 1993
NOTES: 15(2)
ABSTRACT: A left calcaneum and astragalus from an individual of Arctodus simus (Cope, 1879) were recovered during development mitigation in the city of Murrieta, Riverside County, California. Sediments in this area, attributed to an unnamed sandstone and conglomerate formation, consist of green, fine-grained sands, silts and micaceous clays. These sediments are assigned to the late Blancan and/or the Irvingtonian North American Land Mammal Ages. The remains of A. simus were recovered from below an ash horizon tentatively correlated with the Bishop Tuff (0.7 m.y. BP) and are considered to be Irvingtonian (early Pleistocene) in age. Skeletal elements of Arctodus simus have been recovered from Pleistocene sediments throughout North America, except in the southeastern United States. In California, A. simus is known from several Rancholabrean localities, including Potter Creek Cave and Rancho La Brea, and early Irvingtonian sites at Vallecito Creek and Irvington. Sexual dimorphism is marked in this species; previously proposed subspecific distinctions are unwarranted. The specimens from Murrieta represent a large male.
COLLECTION: PaleoBios Archive Public
ID: 182

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    BNHM      University of California, Berkeley