[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 Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
                   Subclass Actinopterygii Woodward, 1891 - ray-finned fishes see Class Actinopterygii Woodward, 1891
                     Infraclass Teleostei Müller, 1845
                       Division Euteleostei Greenwood et al., 1967 see Cohort Euteleosteomorpha (Greenwood et al., 1966)
                         Superorder Ostariophysi Jordan & Evermann, 1896 see Subcohort Ostariophysi Sagemehl, 1885
                           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)