Chelicerata Heymons, 1901 †Eurypterida Burmeister, 1843 - eurypterids †Eurypterina Burmeister, 1843 Superfamily †'Eurypteroidea' Burmeister, 1843 [monophyletic?] Family †Erieopteridae Tollerton, 1989 [monotypic] 1 Genus †Erieopterus Kjellesvig-Waering, 1958