Chelicerata Heymons, 1901 Ricinulei Thorell, 1876 [monotypic] - ricinuleids Suborder †Primoricinulei Wunderlich, 2015 Family †Monooculrcinulidae Dunlop, Penney & Jekel 2017, orth. inval. [monotypic] see Family Monooculricinuleidae Wunderlich, 2017 Genus †Monooculricinuleus Wunderlich, 2017