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
                       01 Family Diplomystidae Eigenmann, 1890 - diplomystid catfishes
                       02 Family Ictaluridae Gill, 1861 - North American freshwater catfishes
                       03 Family Bagridae Bleeker, 1858 - bagrid catfishes
                       04 Family Siluridae Rafinesque, 1815 - sheatfishes
                       05 Family Schilbeidae Bleeker, 1858 - schilbeid catfishes
                       06 Family Pangasiidae Bleeker, 1858 - pangasid catfishes
                       07 Family Tachysuridae see Family Arriidae
                       08 Family Ariidae Bleeker, 1862 - sea catfishes
                       09 Family Amblycipitidae Day, 1873 - torrent catfishes
                       10 Family Sisoridae Bleeker, 1858 - sisorid catfishes
                       11 Family Clariidae Bonaparte, 1846 - airbreathing catfishes
                       12 Family Heteropneustidae - airsac catfishes
                       13 Family Chacidae Bleeker, 1858 - squarehead catfishes
                       14 Family Olyridae - olyrid catfishes see Family Bagridae Bleeker, 1858
                       15 Family Malapteruridae Bleeker, 1858 - electric catfishes
                       16 Family Mochocidae
                       17 Family Doradidae Bleeker, 1858 - thorny catfishes
                       18 Family Bunocephalidae see Family Aspredinidae Adams, 1854
                       19 Family Plotosidae Bleeker, 1858 - eeltail catfishes
                       20 Family Pimelodidae Bonaparte, 1838 - long-whiskered catfishes
                       21 Family Trichomycteridae Bleeker, 1858 - parasitic catfishes and candirus
                       22 Family Callichthyidae Bonaparte, 1838 - callichthyid armored catfishes
                       23 Family Loricariidae Rafinesque, 1815 - suckermouth armored catfishes