[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Deuterostomia Grobben, 1908 see Infrakingdom Deuterostomia Grobben, 1908
           Phylum Chordata Bateson, 1885 - chordates
             Subphylum Vertebrata Cuvier, 1812 - vertebrates
               Superclass Pisces Linnaeus, 1758 - fishes
                 Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
                   Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
                     1 Order †Cladoselachii
                     2 Order †Pleuracanthodii
                     3 Order Chlamydoselachiformes
                     4 Order Hexanchiformes Compagno, 1973 - six-gill sharks
                     5 Order Squaliformes Compagno, 1973 - dogfish sharks
                     6 Order Rajiformes Berg, 1940 - skates