[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
           Genus Alepocephalus Goode & Bean, 1879
             1 Alepocephalus agassizii Goode & Bean, 1883 - Agassiz' smooth-head
             2 Alepocephalus bairdii Goode & Bean, 1879 - Baird's smooth-head
             3 Alepocephalus productus Gill, 1883 - smalleye smooth-head
             4 Alepocephalus rostratus Risso, 1820 - Risso's smooth-head