[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 Pantetrapulmonata Shultz, 2007 [Order] Araneida Clerck, 1757 - spiders [Suborder] †Chimerarachnida Wunderlich, 2018 [monotypic] - tailed spiders 1 Family †Chimerarachnidae Wunderlich, 2019