Chelicerata Heymons, 1901
†Eurypterida Burmeister, 1843 - eurypterids
†Stylonurina Diener, 1924
†Eurypterina Burmeister, 1843
Genus †Dorfopterus Kjellesvig-Waering, 1955, incertae sedis
Genus †Holmipterus Kjellesvig-Waering, 1979, incertae sedis
Genus †Marsupipterus Caster & Kjellesvig-Waering, 1955, incertae sedis
Genus †Unionopterus Chernyshev, 1948, incertae sedis