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 †Eodiscida Kobayashi, 1939
           1 Family †Calodiscidae Kobayashi, 1943
           2 Family †Eodiscidae Raymond, 1913
           3 Family †Hebediscidae Kobayashi, 1944
           4 Family †Tsunyidiscidae Zhang, 1980
           5 Family †Weymouthiidae Kobayashi, 1943
           6 Family †Yukoniidae Zhang, 1980