Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801 Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes see Infraclass Elasmobranchii Bonaparte, 1838 Superorder Euselachii Hay, 1902 see Subclass Euselachii Hay, 1902 Order Galeomorpha see Superorder Galeomorphii Compagno, 1973 Family †Palaeospinacidae Regan, 1906