[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Osteichthyes Huxley, 1880 - bony fishes and tetrapods see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
       Order Gadiformes Goodrich, 1909 - cods and hakes
         Family Macrouridae Bonaparte, 1831 - grenadiers
           Genus Hymenocephalus Giglioli, 1884
             Subgenus Hymenocephalus (Hymenogadus) Gilbert & Hubbs, 1920 see Genus Hymenogadus Gilbert & Hubbs, 1920
               Hymenocephalus (Hymenogadus) gracilis Gilbert & Hubbs, 1920 - graceful grenadier