[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
       Order Osmeriformes - freshwater smelts see Suborder Osmeroidei
         Family Alepocephalidae - slickheads
           01 Genus Alepocephalus Goode & Bean, 1879
           02 Genus Asquamiceps Zugmayer, 1911
           03 Genus Bajacalifornia Townsend & Nichols, 1925
           04 Genus Bathylaco Goode & Bean, 1896
           05 Genus Bathyprion Marshall, 1966
           06 Genus Bathytroctes
           07 Genus Conocara Goode & Bean, 1896
           08 Genus Einara Parr, 1951
           09 Genus Herwigia Nielsen, 1972
           10 Genus Leptoderma Vaillant, 1886
           11 Genus Mirognathus Parr, 1951
           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