Class †Placodermi McCoy, 1848
   Order †Arthrodira Woodward, 1891 see [unranked] Arthrodira Woodward, 1891
     Genus †Turriaspis orth. inval. see Genus Turrisaspis Daeschler, Frumes & Mullison, 2003
       1 †Turriaspis elektor comb. inval. see Turrisaspis elektor Daeschler, Frumes & Mullison, 2003