[Arthropoda] Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848 Arachnomorpha Heider, 1913 †Trilobitomorpha Størmer, 1944 see Superclass Trilobitomorpha Størmer, 1944 †Naraoiidae Walcott, 1912 †Liwiinae Dzik & Lendzion, 1988 Genus †Soomaspis Fortey & Theron, 1995