Chelicerata Heymons, 1901 Ricinulei Thorell, 1876 [monotypic] - ricinuleids Suborder †Palaeoricinulei Selden, 1992 Family †Poliocheridae Scudder, 1884 1 Genus †Poliochera Scudder, 1884 2 Genus †Terpsicroton Selden, 1993