[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
     Order Carnivora Bowdich, 1821 - carnivores
       Family Phocidae Gray, 1821 - true seals
         1 Genus Cystophora Nilsson, 1820 - hooded seal
         2 Genus Erignathus Gill, 1866 - bearded seal
         3 Genus Halichoerus Nilsson, 1820 - gray seal
         4 Genus Monachus Fleming, 1822 - monk seals
         5 Genus Phoca Linnaeus, 1758 - harbor, ringed, harp, and ribbon seals