Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
     Class Mammalia Linnaeus, 1758 - mammals
       1 Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
       2 Order Carnivora Bowdich, 1821 - carnivores
       3 Order Sirenia Gill, 1872 - sea cows