vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorpha
     Subclass †Heterostraci Lankester, 1868
       Order †Tesseraspidiformes Halstead, 1962
         Family †Tesseraspididae Berg, 1955, nom. praeval.
           1 Genus †Tesseraspis Wills, 1935