[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
         Class †Pteraspidomorpha
           Subclass †Arandaspida
             Order †Arandaspidiformes Ritchie & Gilbert-Tomlinson, 1977 [monotypic]
               Family †Arandaspididae Ritchie & Gilbert-Tomlinson, 1977
                 Genus †Porophoraspis Ritchie & Gilbert-Tomlinson, 1977