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 Order †Symmoriida Zangerl, 1981 see Order Symmoriiformes Zangerl, 1981 Family †Stethacanthidae Lund, 1974 see Family Symmoriidae Dean, 1909