Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Vertebrata Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
         Myopterygii Janvier, 1978 - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade †Placodermiomorphi [monotypic]
               Class †Placodermi McCoy, 1848
                 Order †Antiarchiformes Grande & Eastman, 1986 - antiarchs see [unranked] Antiarchi Cope, 1885
                   Suborder †Bothriolepoidei see Suborder Bothriolepidoidei Cope, 1886
                     Infraorder †Sinolepida [monotypic] see Infraorder Sinolepidida
                       Family †Sinolepidae Liu & Pan, 1958
                         Genus †Grenfellaspis Ritchie, Wang, Young & Zhang, 1992