fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Chordata Bateson, 1885 - chordates see Phylum Chordata Bateson, 1885
       Class Mammalia Linnaeus, 1758 - mammals
         1 Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
         2 Order Sirenia Gill, 1872 - sea cows
         3 Order Carnivora Bowdich, 1821 - carnivores
         4 Order †Desmostylia Reinhart, 1953