Class †Placodermi McCoy, 1848 Order †Arthrodira Woodward, 1891 see [unranked] Arthrodira Woodward, 1891 †Aspinothoracida see [unranked] Aspinothoracidi Stensiö, 1959 Family †Selenosteidae Dean, 1901 Genus †Draconichthys Rücklin, 2011 †Draconichthys elegans Rücklin, 2011