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 Galeomorphii Compagno, 1973 see Division Galeomorphii Compagno, 1973
                       Order Carcharhiniformes Compagno, 1973 - ground sharks
                         1 Family Scyliorhinidae Gill, 1862 - cat sharks
                         2 Family Proscylliidae Fowler, 1941 - finback catsharks
                         3 Family Pseudotriakidae Gill, 1893 - false catsharks
                         4 Family Leptochariidae Gray, 1851 - barbeled houndsharks
                         5 Family Triakidae Gray, 1851 - houndsharks
                         6 Family Hemigaleidae Hasse, 1879 - weasel sharks
                         7 Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
                         8 Family Sphyrnidae Gill, 1872 - hammerhead sharks