Noun
walruses and extinct forms
Source: WordNetIt is the sole surviving member of the family Odobenidae, one of three lineages in the suborder Pinnipedia along with true seals ( Phocidae ) and eared seals ( Otariidae ). Source: Internet
Odobenidae consists of only one living member: the modern walrus. Source: Internet
The lineages of Otariidae and Odobenidae split almost 28 mya. Source: Internet