[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Osteostracomorphi
         Class †Galeaspidomorphi
           Superorder †Polybranchiaspidida Zhu & Gai, 2007
             Order †Pituriaspidiformes [monotypic]
               Family †Pituriaspididae Davis, 1994, nom. nud.
                 1 Genus †Pituriaspis Young, 1991
                 2 Genus †Neeyambaspis Young, 1991