Chelicerata Heymons, 1901
   †Eurypterida Burmeister, 1843 - eurypterids
     †Stylonurina Diener, 1924
       Superfamily †Mycteropoidea Cope, 1886
         Family †Hibbertopteridae Kjellesvig-Waering, 1959
           1 Genus †Campylocephalus Eichwald, 1860
           2 Genus †Cyrtoctenus Størmer & Waterston, 1968
           3 Genus †Dunsopterus Waterston, 1968
           4 Genus †Hastimima White, 1908
           5 Genus †Hibbertopterus Kjellesvig-Waering, 1959
           6 Genus †Vernonopterus Waterston, 1968