Fishes
   Class Actinopterygii Woodward, 1891 - ray-finned fishes
     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 Cranoglanididae Myers, 1931, nom. corr. - armorhead catfishes
       05 Family Siluridae Rafinesque, 1815 - sheatfishes
       06 Family Schilbeidae Bleeker, 1858 - schilbeid catfishes
       07 Family Pangasiidae Bleeker, 1858 - pangasid catfishes
       08 Family Amblycipitidae Day, 1873 - torrent catfishes
       09 Family Amphiliidae Regan, 1911 - loach catfishes
       10 Family Akysidae Gill, 1861 - stream catfishes
       11 Family Parakysidae - parakysid catfishes see Subfamily Parakysinae
       12 Family Sisoridae Bleeker, 1858 - sisorid catfishes
       13 Family Clariidae Bonaparte, 1846 - airbreathing catfishes
       14 Family Heteropneustidae - airsac catfishes
       15 Family Chacidae Bleeker, 1858 - squarehead catfishes
       16 Family Olyridae - olyrid catfishes see Family Bagridae Bleeker, 1858
       17 Family Malapteruridae Bleeker, 1858 - electric catfishes
       18 Family Ariidae Bleeker, 1862 - sea catfishes
       19 Family Plotosidae Bleeker, 1858 - eeltail catfishes
       20 Family Mochokidae Jordan, 1923 - squeakers and upside-down catfishes
       21 Family Doradidae Bleeker, 1858 - thorny catfishes
       22 Family Auchenipteridae Bleeker, 1862 - auchenipterid catfishes
       23 Family Pimelodidae Bonaparte, 1838 - long-whiskered catfishes
       24 Family Ageneiosidae - bottlenose catfishes see Family Auchenipteridae Bleeker, 1862
       25 Family Helogeneidae - helogeneid catfishes see Subfamily Helogeneinae
       26 Family Cetopsidae Bleeker, 1858 - whalelike catfishes
       27 Family Hypophthalmidae - loweye catfishes see Family Pimelodidae Bonaparte, 1838
       28 Family Aspredinidae Adams, 1854 - banjo catfishes
       29 Family Trichomycteridae Bleeker, 1858 - parasitic catfishes and candirus
       30 Family Callichthyidae Bonaparte, 1838 - callichthyid armored catfishes
       31 Family Loricariidae Rafinesque, 1815 - suckermouth armored catfishes
       32 Family Scoloplacidae Bailey & Baskin, 1976 - spiny dwarf catfishes
       33 Family Astroblepidae Bleeker, 1862 - climbing catfishes