Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theria Parker & Haswell, 1897
       Infraclass Eutheria Gill, 1872
         Cohort Epitheria McKenna, 1975
           Superorder Ferae Linnaeus, 1758 see Grandorder Ferae Linnaeus, 1758
             Order Carnivora Bowdich, 1821 - carnivores
               Suborder Pinnipedia Illiger, 1811 see Parvorder Pinnipedia Illiger, 1811
                 Superfamily Phocoidea Gray, 1821
                   Family Phocidae Gray, 1821 - true seals
                     1 Genus †Acrophoca de Muizon, 1981