Phylum Chordata Bateson, 1885 - chordates
Status: extant
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
  Status: extant
     Class Mammalia Linnaeus, 1758 - mammals
    Status: extant
       Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
      Status: extant
         Suborder Odontoceti Flower, 1867 - toothed whales see Parvorder Odontoceti Flower, 1867
        Status: extant
           Family Delphinidae Gray, 1821 - oceanic dolphins
          Status: extant
           Family Kogiidae Gill, 1871
          Status: extant
           Family Monodontidae Gray, 1821 - white whales
          Status: extant
           Family Phocoenidae Gray, 1825 - porpoises
          Status: extant
           Family Physeteridae Gray, 1821 - sperm whales
          Status: extant
           Family Ziphiidae Gray, 1850 - beaked whales
          Status: extant