[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
         Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
           Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
             Infraclass Elasmobranchii Bonaparte, 1838
               Division Batomorphi - rays
                 Order Torpediniformes de Buen, 1926 - electric rays
                   1 Family Torpedinidae Henle, 1834 - torpedo electric rays
                   2 Family Hypnidae Gill, 1862 - coffin rays
                   3 Family Narcinidae Gill, 1862 - electric rays
                   4 Family Narkidae Fowler, 1934 - sleeper rays