living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Theria Parker & Haswell, 1897
                 Infraclass Eutheria Gill, 1872
                   Order Mysticeta see Parvorder Mysticeti Cope, 1891
                     Family Balaenopteridae Gray, 1864 - rorquals
                       Genus Balaenoptera Lacépède, 1804 - rorquals
                         1 Balaenoptera musculus (Linnaeus, 1758) - blue whale
                         2 Balaenoptera physalus (Linnaeus, 1758) - fin whale
                         3 Balaenoptera borealis Lesson, 1828 - Sei whale
                         4 Balaenoptera edeni Anderson, 1879 - Bryde's whale
                         5 Balaenoptera acutorostra see Balaenoptera acutorostrata Lacépède, 1804