[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] †Phalangiotarbida Haase, 1890 Family †Opiliotarbidae Petrunkevitch, 1945 [monotypic] 1 Genus †Opiliotarbus Pocock, 1910