Class Mammalia Linnaeus, 1758 - mammals
   Order Carnivora Bowdich, 1821 - carnivores
     Family Phocidae Gray, 1821 - true seals
       Genus Mirounga Gray, 1827 - elephant-seals
         1 Mirounga angustirostris (Gill, 1866) - northern elephant seal
         2 Mirounga leonina (Linnaeus, 1758) - southern elephant seal