Chelicerata Heymons, 1901 †Eurypterida Burmeister, 1843 - eurypterids †Eurypterina Burmeister, 1843 Superfamily †'Eurypteroidea' Burmeister, 1843 [monophyletic?] Family †Eurypteridae Burmeister, 1843 [monotypic] 1 Genus †Eurypterus de Kay, 1826