Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         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
                   Order Selachii see Subdivision Selachii
                     Order Selachii see Subdivision Selachii
                       Suborder Heterodontoidei see Order Heterodontiformes Compagno, 1973
                         Family Heterodontidae Gray, 1851 - bullhead and horn sharks
                           Genus Heterodontus Blainville, 1816
                             Heterodontus japonicus Miklouho-Maclay & Macleay, 1884 - Japanese bullhead shark