Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum †Trilobitomorpha Størmer, 1944 - trilobites see Superclass Trilobitomorpha Størmer, 1944
       Class †Trilobita Walch, 1771 - trilobites
         Order †Phacopida Salter, 1864
           ?Suborder †Calymenina Swinnerton, 1915
             1 Family †Bathycheilidae Přibyl, 1953
             2 Family †Bavarillidae Sdzuy, 1957
             3 Family †Calymenidae Burmeister, 1843
             4 Family †Homalonotidae Chapman, 1890
             5 Family †Pharostomatidae Hupé, 1953