[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 Anguilliformes Berg, 1943 - eels
         Family Congridae Kaup, 1856 - conger eels
           Genus Gnathophis Kaup, 1859
             1 Gnathophis codoniphorus Maul, 1972
             2 Gnathophis mystax (Delaroche, 1809) - blacktailed conger