[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] Ricinulei Thorell, 1876 - ricinuleids Suborder †Palaeoricinulei Selden, 1992 1 Family †Curculioididae Cockerell, 1916 2 Family †Poliocheridae Scudder, 1884