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 Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
                 Subclass Actinopterygii Woodward, 1891 - ray-finned fishes see Class Actinopterygii Woodward, 1891
                   Superorder Teleostei Bonaparte, 1836
                     Order Siluriformes Rafinesque, 1810 - catfishes
                       Family Ictaluridae Gill, 1861 - North American freshwater catfishes
                         Genus Ictalurus Rafinesque, 1820
                           Ictalurus nebulosus (Le Sueur, 1819) - brown bullhead see Ameiurus nebulosus (Lesueur, 1819)
                           Ictalurus punctatus (Rafinesque, 1818) - channel catfish