Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Infraphylum Vertebrata Lamarck, 1801 - vertebrates
         Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
           Eugnathostomata
             Grade Chondrichthyomorphi [monotypic]
               Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
                 Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
                   Infraclass Elasmobranchii Bonaparte, 1838
                     Division Selachii - sharks
                       Superorder Galeomorphi Compagno, 1973
                         Order Carcharhiniformes Compagno, 1973 - ground sharks
                           1 Family Scyliorhinidae Gill, 1862 - catsharks
                           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, 1878 - weasel sharks
                           7 Family Carcharhinidae Jordan & Evermann, 1896 - requiem sharks
                           8 Family Sphyrnidae Bonaparte, 1840 - hammerhead sharks