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 †Corynexochida Kobayashi, 1935
           1 Suborder †Corynexochina Kobayashi, 1935
           2 Suborder †Illaenina Jaanusson, 1959 [monophyletic?]
           3 Suborder †Leiostegiina Bradley, 1925