[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
         Class †Pteraspidomorpha
           Subclass †Heterostraci Lankester, 1868
             Order †Pteraspidiformes Berg, 1940
               Suborder †Pteraspidoidei Berg, 1940
                 Family †Doryaspididae Heintz, 1962
                   1 Genus †Doryaspis White, 1935
                   2 Genus †Lyktaspis Heintz, 1968 see Genus Doryaspis White, 1935