Full reference: L. G. Barnes. 1987. An early Miocene pinniped of the genus Desmatophoca (Mammalia: Otariidae) from Washington. Contributions in Science 382:1-20
Sister taxon: Desmatophoca oregonensis
Type specimen: LACM 120199, a skull. Its type locality is Knappton, east, which is in a Burdigalian marine horizon in the Astoria Formation of Washington.
Ecology: amphibious carnivore-omnivore