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| TITLE: | The Late Pleistocene record of Homotherium (Felidae: Machairodontinae) in the southwestern United States
| | AUTHOR: | G.T. Jefferson and A.E. Tejada-Flores
| | JOURNAL: | PaleoBios
| | PUBLISHED: | May 24, 1993
| | NOTES: | 15(3)
| | ABSTRACT: | Compared to the New World sabertoothed cat, Smilodon, remains of the holarctic genus, Homotherium, are very rare and widely scattered in North America. The genus Homotherium, which was not previously known from the southwestern United States, is now identified from two Rancholabrean age assemblages in southern California. Both dental and postcranial materials, including distinctively serrated canine and incisor teeth and tarsal/metapodial elements representing at least five individuals, have been recovered from Rancho La Brea. These relatively gracile specimens are referred to Homotherium serum, the typical late Pleistocene, Rancholabrean age taxon. The asphalt impregnated fluvial deposits which yield the Rancho La Brea remains date from 36,000 to 11,000 yr BP. A relatively robust partial humerus, which is comparable to the typical early Pleistocene, Blancan age taxon, Homotherium crenatidens was recovered from the Lake Manix Formation in the central Mojave Desert. The paralimnitic, near shore deposits which produced the specimen are estimated to be ca. 280,000 yr BP in age. A relatively gracile metacarpal, also recovered from the same stratigraphic horizon in the Lake Manix Formation, probably represents H. serum.
| | COLLECTION: | PaleoBios Archive Public
| | ID: | 178
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