[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Osteostracomorphi
         Class †Galeaspidomorphi
           Superorder †Polybranchiaspidida Zhu & Gai, 2007
             Order †Polybranchiaspidiformes Liu, 1965
               Family †Polybranchiaspididae Liu, 1965, nom. praeval.
                 Genus †Cyclodiscaspis Liu, 1975