PaleoDB taxon number: 72280
Full reference: Y. Tomida. 1989. A new walrus (Carnivora, Odobenidae) from the middle Pleistocene of the Boso Peninsula, Japan, and its implication on odobenid paleobiology. Bulletin of the National Science Museum, Series C (Geology & Paleontology) 15(3):109-119
Type specimen: NSM-PV 18911, a mandible. Its type locality is Mandano, which is in a Pleistocene marginal marine sandstone in the Mandano Formation of Japan.
Ecology: scansorial insectivore