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 †Cheirurina Harrington & Leanza, 1957
             1 Family †Cheiruridae Hawle & Corda, 1847
             2 Family †Encrinuridae Angelin, 1854
             3 Family †Pliomeridae Raymond, 1913