Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes Superorder Euselachii Hay, 1902 see Infraclass Euselachii Hay, 1902 Order †Ctenacanthiformes Glikman, 1964 Superfamily †Hybodontoidea Owen, 1846 1 Family †Hybodontidae Owen, 1846