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 †Redlichiida Richter, 1932
           Suborder †Redlichiina Richter, 1932 [paraphyletic]
             Superfamily †Ellipsocephaloidea Matthew, 1887
               1 Family †Agraulidae Raymond, 1913
               2 Family †Bigotinidae Hupé, 1953
               3 Family †Ellipsocephalidae Matthew, 1887
               4 Family †Estaingiidae Öpik, 1975
               5 Family †Palaeolenidae Hupé, 1953
               6 Family †Yunnanocephalidae Hupé, 1953