Mammalia - Carnivora - Odobenidae

Full reference: H. Horikawa. 1995. A primitive odobenine walrus of Early Pliocene age from Japan. The Island Arc 3:309-328

Parent taxon: Odobeninae according to R. W. Boessenecker and M. Churchill 2013

Sister taxa: Aivukus, Odobenini, Odobenus, Ontocetus, Pliopedia, Valenictus

Subtaxa: Protodobenus japonicus

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Ecology: amphibious carnivore