Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801 Gnathostomata Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Order †Petalodontida see Order Petalodontiformes Zangerl, 1981 Family †Pristodontidae Woodward, 1889