[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]
Family †Adelophthalmidae Tollerton, 1989
Genus †Pittsfordipterus Kjellesvig-Waering & Leutze, 1966