[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
         Class †Pteraspidomorpha
           Subclass †Astraspida Berg, 1940 [monotypic]
             Order †Astraspidiformes Berg, 1940
               Family †Eriptychiidae Tarlo, 1962
                 1 Genus †Eriptychius Walcott, 1892