Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Class Osteichthyes Huxley, 1880 [paraphyletic] - bony fishes see [unranked] Euteleostomi
         Subclass Actinopterygii Woodward, 1891 - ray-finned fishes see Class Actinopterygii Woodward, 1891
           Infraclass Neopterygii Regan, 1923 see Subclass Neopterygii Regan, 1923
             Division Teleostei Müller, 1845 see Infraclass Teleostei Müller, 1845
               Subdivision Euteleostei Greenwood et al., 1966 see Cohort Euteleosteomorpha (Greenwood et al., 1966)
                 Superorder Ostariophysi Jordan & Evermann, 1896 see Subcohort Ostariophysi Sagemehl, 1885
                   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 Craniglanidae Carroll, 1988, nom. null. see Family Cranoglanididae Myers, 1931, nom. corr.
                     05 Family Siluridae Rafinesque, 1815 - sheatfishes
                     06.1 Family Schilbidae Bleeker, 1858 see Family Schilbeidae Bleeker, 1858
                     06.2 Family Pangasiidae Bleeker, 1858 - pangasid catfishes
                     07 Family Amblycipitidae Day, 1873 - torrent catfishes
                     08 Family Amphiliidae Regan, 1911 - loach catfishes
                     09 Family Akysidae Gill, 1861 - stream 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 Mochokidae Jordan, 1923 - squeakers and upside-down catfishes
                     17 Family Arriidae see Family Ariidae Bleeker, 1862
                     18 Family Doradidae Bleeker, 1858 - thorny catfishes
                     19 Family Auchenipteridae Bleeker, 1862 - auchenipterid catfishes
                     20 Family Aspredinidae Adams, 1854 - banjo catfishes
                     21 Family Plotosidae Bleeker, 1858 - eeltail catfishes
                     22 Family Pimelodontidae see Family Pimelodidae Bonaparte, 1838
                     23 Family Ageneiosidae - bottlenose catfishes see Family Auchenipteridae Bleeker, 1862
                     24 Family Hypopthalmidae see Family Hypophthalmidae
                     25 Family Helogeneidae - helogeneid catfishes see Subfamily Helogeneinae
                     26 Family Cetopsidae Bleeker, 1858 - whalelike catfishes
                     27 Family Stegophilidae see Subfamily Stegophilinae
                     28 Family Trichomycteridae Bleeker, 1858 - parasitic catfishes and candirus
                     29 Family Callichthyidae Bonaparte, 1838 - callichthyid armored catfishes
                     30 Family Loricariidae Rafinesque, 1815 - suckermouth armored catfishes