Gomphotaria is a genus of very large shellfish-eating dusignathine walrus[1] found along the coast of what is now California, during the late Miocene.

[2] Gomphotaria had comparatively small eyes, increased upper and lower canines and four tusks, with one pair in the lower and upper jaws.

[clarification needed] According to wear on the tusks, G. pugnax hammered shellfish open, rather than simply sucking them out of their shells as do modern walruses.

Gomphotaria is a prime example of the extreme diversity that walruses once exhibited.

This article related to prehistoric animals from order Carnivora is a stub.