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 Sirenia Gill, 1872 - sea cows
                     Family Dugongidae Gray, 1821 - dugong and sea cow
                       Subfamily ‡Hydrodamalinae Palmer, 1895
                         Genus ‡Hydrodamalis Retzius, 1794 - Steller's sea cow, great northern sea cow
                           ‡Hydrodamalis gigas (Zimmermann, 1780) - Steller's sea cow