Chelicerata Heymons, 1901 Opiliones Sundevall, 1833 - harvestmen Phalangida Bristowe, 1949 Suborder Dyspnoi Hansen & Sørensen, 1904 - ornate harvestmen Superfamily Ischyropsalidoidea Simon, 1879 Genus †Piankhi Dunlop, Bartel & Mitov, 2012