[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] Ricinulei Thorell, 1876 - ricinuleids
         Suborder †Primoricinulei Wunderlich, 2015
           1 Family †Primoricinuleidae Wunderlich, 2015 [monotypic]
           2 Family †Hirsutisomidae Wunderlich, 2017 [monotypic]
           3 Family †Sigillaricinuleidae Wunderlich, 2022 [monotypic]
           4 Family †Monooculrcinulidae Dunlop, Penney & Jekel 2017, orth. inval. [monotypic] see Family Monooculricinuleidae Wunderlich, 2017