Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Otariidae Gray, 1825 - eared seals, fur seals, and sea lions
           Genus Callorhinus Gray, 1859 [monotypic] - northern fur seal
             1 Callorhinus ursinus (Linnaeus, 1758) - northern fur seal