Chordata Bateson, 1885 - chordates
   Class †Ostracophori
     Order †Heterostraci Lankester, 1868 - heterostracans see Subclass Heterostraci Lankester, 1868
       Family †Ceraspidae nom. illeg. [monotypic]
         1 Genus †Ceraspis Schlüter, 1887, nom. illeg. see Genus Cornaspis Whitley, 1940