Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Phocidae Gray, 1821 - true seals
           01 Genus Cystophora Nilsson, 1820 [monotypic] - hooded seal
           02 Genus Erignathus Gill, 1866 [monotypic] - bearded seal
           03 Genus Halichoerus Nilsson, 1820 [monotypic] - gray seal
           04 Genus Histriophoca Gill, 1873 [monotypic]
           05 Genus Hydrurga Gistel, 1848 [monotypic] - leopard seal
           06 Genus Leptonychotes Gill, 1872 [monotypic] - Weddell seal
           07 Genus Lobodon Gray, 1844 [monotypic] - crabeater seal
           08 Genus Mirounga Gray, 1827 - elephant-seals
           09 Genus Monachus Fleming, 1822 - monk seals
           10 Genus Ommatophoca Gray, 1844 [monotypic] - Ross seal
           11 Genus Pagophilus Gray, 1844 [monotypic]
           12 Genus Phoca Linnaeus, 1758 - harbor, ringed, harp, and ribbon seals
           13 Genus Pusa Scopoli, 1777