Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Superclass Pisces Linnaeus, 1758 - fishes Chondrichthyes Huxley, 1880 - cartilaginous fishes Family Torpedinidae Henle, 1834 - electric rays Genus Hypnos Duméril, 1852 Hypnos monopterygium (Shaw, 1795) see Hypnos monopterygius (Shaw, 1795)