[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] †Eurypterida Burmeister, 1843 - eurypterids
         [Suborder] †Stylonurina Diener, 1924
           Superfamily †Stylonuroidea Kjellesvig-Waering, 1959
             Family †Stylonuridae Diener, 1924
               1 Genus †Ctenopterus Clarke & Ruedemann, 1912
               2 Genus †Laurieipterus Kjellesvig-Waering, 1966
               3 Genus †Pagea Waterston, 1962
               4 Genus †Stylonurus Page, 1856