Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801 Gnathostomata Class †Placodermi McCoy, 1848 Order †Petalichthyida Jaekel, 1911 [monotypic] see Order Petalichthyiformes 1 Family †Macropetalichthyidae Eastman, 1898