Chelicerata Heymons, 1901
   †Eurypterida Burmeister, 1843 - eurypterids
     †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