Chelicerata Heymons, 1901 Opiliones Sundevall, 1833 - harvestmen Phalangida Bristowe, 1949 Suborder Dyspnoi Hansen & Sørensen, 1904 - ornate harvestmen Family †Halithersidae Dunlop, Selden & Giribet, 2016 [monotypic] 1 Genus †Halitherses Giribet & Dunlop, 2005