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 Squalomorpha see Superorder Squalomorphii (Compagno, 1973) Suborder Pristiophoroidea [monotypic] see Order Pristiophoriformes Compagno, 1973 1 Family Pristiophoridae Bleeker, 1859 - saw sharks