[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] †Eurypterida Burmeister, 1843 - eurypterids
         [Suborder] †Eurypterina Burmeister, 1843
           [Infraorder] †Diploperculata Lamsdell, Hoşgör & Selden, 2013
             Superfamily †Carcinosomatoidea Størmer, 1934
               Family †Mixopteridae Caster & Kjellesvig-Waering, 1955
                 1 Genus †Lanarkopterus Ritchie, 1968
                 2 Genus †Mixopterus Ruedemann, 1920
                 3 Genus †Terropterus Wang, Dunlop, Gai, Lei, Jarzembowski & Wang, 2021