[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 †Tolypelepidiformes [monotypic]
               Family †Tolypelepididae Strand, 1934 (1932), nom. praeval. see Subfamily Tolypelepidinae Strand, 1934 (1932), nom. praeval.
                 1 Genus †Tolypaspis Schmidt, 1893 see Genus Tolypelepis Pander, 1856
                 2 Genus †Tolypelepis Pander, 1856