[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 Bathytroctes
             1 Bathytroctes macrognathus Sazonov, 1999
             2 Bathytroctes macrolepis Günther, 1887
             3 Bathytroctes michaelsarsi Koefoed, 1927 - Michael Sars smooth-head
             4 Bathytroctes microlepis Günther, 1878 - smallscale smooth-head