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 †Olenida Adrain, 2011
           01 Family †Andrarinidae Raymond, 1937
           02 Family †Aphelaspididae Palmer, 1960
           03 Family †Asaphiscidae Raymond, 1924
           04 Family †Cedariidae Raymond, 1937
           05 Family †Dokimokephalidae Kobayashi, 1935
           06 Family †Eulomidae Kobayashi, 1955
           07 Family †Idahoiidae Lochman, 1956
           08 Family †Loganellidae Rasetti, 1959
           09 Family †Olenidae Burmeister, 1843
           10 Family †Parabolinoididae Lochman, 1956
           11 Family †Pterocephaliidae Kobayashi, 1935
           12 Family †Remopleurididae Hawle & Corda, 1847