[Arthropoda] Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848 Arachnomorpha Heider, 1913 †Trilobitomorpha Størmer, 1944 see Superclass Trilobitomorpha Størmer, 1944 †Helmetiida Novozhilov, 1969 see Order Helmetiida Novozhilov, 1969 †Helmetiidae Simonetta & Delle Cave, 1975 Genus †Kuamaia Hou, 1987