†Placodermi McCoy, 1848
Status: fossil
   †Arthrodira Woodward, 1891
  Status: fossil
     †Brachythoraci Gross, 1932
    Status: fossil
       †Eubrachythoraci Miles, 1971
      Status: fossil
         †Pachyosteomorphi Stensiö, 1944 - pachyosteomorphs
        Status: fossil
           Superfamily †Dunkleosteoidea Stensiö, 1963
          Status: fossil
             Family †Dunkleosteidae Stensiö, 1963, "nom. praeval."
            Status: fossil
               Genus †Eastmanosteus Obruchev, 1964 [paraphyletic]
              Status: fossil
                 1 †Eastmanosteus calliaspis Dennis-Bryan, 1987
                Status: fossil
                 n †Eastmanosteus pustulosus (Eastman, 1897)
                Status: fossil