[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
         Class †Pteraspidomorpha
           Subclass †Heterostraci Lankester, 1868
             Order †Corvaspidiformes Stensiö, 1964 [monotypic]
               Family †Corvaspididae Dineley, 1955, nom. praeval.
                 1 Genus †Corvaspis Woodward, 1934