Odobenidae

Odobenidae is a family of pinnipeds, of which the only extant species is the walrus (Odobenus rosmarus). In the past, however, the group was much more diverse, and includes more than a dozen fossil genera.

Taxonomy
All genera, except Odobenus, are extinct.
 * †Archaeodobenus
 * †Prototaria
 * †Proneotherium
 * †Nanodobenus
 * †Neotherium
 * †Imagotaria
 * †Kamtschatarctos
 * †Pelagiarctos
 * †Pontolis
 * †Pseudotaria
 * †Titanotaria
 * Clade Neodobenia
 * †Gomphotaria
 * Subfamily Dusignathinae
 * †Dusignathus
 * Subfamily Odobeninae
 * †Aivukus
 * †Ontocetus
 * †Pliopedia
 * †Protodobenus
 * †Valenictus
 * Odobenus

In re-analyzing Pelagiarctos, Boessenecker et al. (2013) proposed the phylogenetic relationships of Odobenidae as follows (this analysis excluded Archaeodobenus, Titanotaria, Nanodobenus, and Pliopedia; and included Enaliarctos, Pteronarctos, Allodesmus, Desmatophoca, Callorhinus, Monachus, and Erignathus):