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 †Asaphida Salter, 1864
           Superfamily †Trinucleoidea Hawle & Corda, 1847
             1 Family †Alsataspididae Turner, 1940
             2 Family †Dionididae Gürich, 1907
             3 Family †Liostracinidae Raymond, 1937
             4 Family †Raphiophoridae Angelin, 1854
             5 Family †Trinucleidae Hawle & Corda, 1847