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 Chondrichthyes Huxley, 1880 - cartilaginous fishes
               Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
                 Cohort Euselachii Hay, 1902 - spined sharks and relatives see Infraclass Euselachii Hay, 1902
                   Subcohort Neoselachii Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
                     Superorder Batoidea - rays see Subdivision Batoidea
                       Order Torpediniformes - electric rays
                         Superfamily Torpedinoidea (Jonet, 1968) see Family Torpedinidae Henle, 1834
                           Family Hypnidae Gill, 1862 see Subfamily Hypninae
                             Genus Hypnos Duméril, 1852
                               Hypnos monopterygium (Shaw, 1795) see Hypnos monopterygius (Shaw, 1795)