Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct. see Subphylum Vertebrata Cuvier, 1812
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
         Myopterygii - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade Teleostomi Bonaparte, 1836
               Euteleostomi - bony vertebrates
                 Class Actinopterygii Woodward, 1891 - ray-finned fishes
                   Subclass Neopterygii Regan, 1923
                     Division Teleostei Müller, 1845 see Infraclass Teleostei Müller, 1845
                       Elopocephala see Supercohort Teleocephala de Pinna, 1996
                         Clupeocephala
                           Subdivision Euteleostei Greenwood et al., 1966 [monophyletic?] see Cohort Euteleosteomorpha (Greenwood et al., 1966)
                             Superorder Protacanthopterygii Greenwood et al., 1966 see Subcohort Protacanthopterygii Greenwood et al., 1966
                               Order Argentiniformes Johnson & Patterson, 1996 - marine smelts
                                 Suborder Alepocephaloidei
                                   Family Alepocephalidae - slickheads
                                     01 Genus Alepocephalus Goode & Bean, 1879
                                     02 Genus Asquamiceps Zugmayer, 1911
                                     03 Genus Aulastomatomorpha Alcock, 1890
                                     04 Genus Bajacalifornia Townsend & Nichols, 1925
                                     05 Genus Bathyprion Marshall, 1966
                                     06 Genus Bathytroctes
                                     07 Genus Bellocia Parr, 1951
                                     08 Genus Conocara Goode & Bean, 1896
                                     09 Genus Ericara Gill & Townsend, 1897
                                     10 Genus Leptochilichthys Garman, 1899
                                     11 Genus Leptoderma Vaillant, 1886
                                     12 Genus Narcetes Alcock, 1890
                                     13 Genus Photostylus Beebe, 1933
                                     14 Genus Rinoctes Parr, 1952
                                     15 Genus Rouleina Jordan, 1923 - Roule's smooth-head
                                     16 Genus Talismania Goode & Bean, 1895
                                     17 Genus Xenodermichthys Günther, 1878