[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 †Adelophthalmoidea Tollerton, 1989 [monotypic] 1 Family †Adelophthalmidae Tollerton, 1989