Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Class †Placodermi McCoy, 1848 Order †Arthrodira Woodward, 1891 see Order Arthrodiriformes Grande & Eastman, 1986 Suborder †Phlyctaeniina see Suborder Phlyctaeniida 1 Family †Phlyctaeniidae Fowler, 1947 2 Family †Holonematidae Obruchev, 1932