Chordata Bateson, 1885 - chordates Class †Arthrodira Woodward, 1891 - arthrodires see Order Arthrodiriformes Grande & Eastman, 1986 Order †Stegophthalami see Class Placodermi McCoy, 1848 Family †Macropetalichthyidae Eastman, 1898 [monotypic] Genus †Macropetalichthys Norwood & Owen, 1846