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) 1 Suborder Squaloidea see Order Squaliformes Compagno, 1973 2 Suborder Pristiophoroidea [monotypic] see Order Pristiophoriformes Compagno, 1973 3 Suborder Squatinoidea [monotypic] see Order Squatiniformes Buen, 1926