A New Species of Sea Otter from the Late Pleistocene of Northwestern California
A new species of sea otter is described from a Late Pleistocene marine deposit, Humboldt County, California. The species is closely related to the living sea otter, Enhydra lutris, but differs significantly in possessing larger P3, P3, M2, and presumably M2, shorter ascending ramus with respect to total length of mandible, and a more simply formed angle. Proportions of the mandible suggest that the skull of the new species may have been slightly longer and lower than that of E. lutris. No special affinities with particular living populations of E. lutris are recognized.
Kilmer, Frank H.
"A New Species of Sea Otter from the Late Pleistocene of Northwestern California,"
Bulletin of the Southern California Academy of Sciences:
Available at: http://scholar.oxy.edu/scas/vol71/iss3/8