[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] †Eurypterida Burmeister, 1843 - eurypterids [Suborder] †Stylonurina Diener, 1924 Genus †Stylonuroides Kjellesvig-Waering, 1966, incertae sedis