[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla lipobranchia
               Branch Amphicondyla [monotypic]
                 Class Mammalia Linnaeus, 1758 - mammals
                   Grade Placentalia Owen, 1837 see Cohort Placentalia Owen, 1837
                     Subclass Carnaria
                       Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
                         1 Genus Balœna Lesson, 1827 see Genus Balaena Linnaeus, 1758
                         2 Genus Squalodon Grateloup, 1840