[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 Leptochilichthyidae - leptochilichthyids
           Genus Leptochilichthys Garman, 1899
             1 Leptochilichthys agassizii Garman, 1899 - Agassiz' smooth-head
             2 Leptochilichthys pinguis (Vaillant, 1886) - Vaillant's smooth-head