Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Siluriformes Rafinesque, 1810 - catfishes
           01 Family Diplomystidae Eigenmann, 1890 - diplomystid catfishes
           02 Family Lacantuniidae Rodiles-Hernández, Hendrickson & Lundberg, 2005
           03 Family Ictaluridae Gill, 1861 - North American freshwater catfishes
           04 Family Bagridae Bleeker, 1858 - bagrid catfishes
           05 Family Cranoglanididae Myers, 1931, nom. corr. - armorhead catfishes
           06 Family Austroglanididae Mo, 1991
           07 Family Siluridae Rafinesque, 1815 - sheatfishes
           08 Family Schilbeidae Bleeker, 1858 - schilbeid catfishes
           09 Family Pangasiidae Bleeker, 1858 - pangasid catfishes
           10 Family Amblycipitidae Day, 1873 - torrent catfishes
           11 Family Amphiliidae Regan, 1911 - loach catfishes
           12 Family Akysidae Gill, 1861 - stream catfishes
           13 Family Sisoridae Bleeker, 1858 - sisorid catfishes
           14 Family Erethistidae
           15 Family Clariidae Bonaparte, 1846 - airbreathing catfishes
           16 Family Heteropneustidae - airsac catfishes
           17 Family Claroteidae Bleeker, 1862
           18 Family Chacidae Bleeker, 1858 - squarehead catfishes
           19 Family Olyridae - olyrid catfishes see Family Bagridae Bleeker, 1858
           20 Family Malapteruridae Bleeker, 1858 - electric catfishes
           21 Family Ariidae Bleeker, 1862 - sea catfishes
           22 Family Anchariidae Glaw & Vences, 1994
           23 Family Plotosidae Bleeker, 1858 - eeltail catfishes
           24 Family Mochokidae Jordan, 1923 - squeakers and upside-down catfishes
           25 Family Doradidae Bleeker, 1858 - thorny catfishes
           26 Family Auchenipteridae Bleeker, 1862 - auchenipterid catfishes
           27 Family Pimelodidae Bonaparte, 1838 - long-whiskered catfishes
           28 Family Pseudopimelodidae Lundberg, Bornbusch & Mago-Leccia, 1991 - bumblebee catfishes
           29 Family Heptapteridae Gill, 1861
           30 Family Cetopsidae Bleeker, 1858 - whalelike catfishes
           31 Family Hypophthalmidae - loweye catfishes see Family Pimelodidae Bonaparte, 1838
           32 Family Aspredinidae Adams, 1854 - banjo catfishes
           33 Family Nematogenyidae Bleeker, 1862
           34 Family Trichomycteridae Bleeker, 1858 - parasitic catfishes and candirus
           35 Family Callichthyidae Bonaparte, 1838 - callichthyid armored catfishes
           36 Family Loricariidae Rafinesque, 1815 - suckermouth armored catfishes
           37 Family Scoloplacidae Bailey & Baskin, 1976 - spiny dwarf catfishes
           38 Family Astroblepidae Bleeker, 1862 - climbing catfishes