[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Osteostracomorphi
         Class †Galeaspidomorphi
           Order †Hanyangaspidiformes
             Family †Dayongaspididae Pan & Zeng, 1985, nom. praeval.
               Genus †Dayongaspis Pan & Zeng, 1985