Order Opiliones Sundevall, 1833 - harvestmen Suborder Dyspnoi Hansen & Sørensen, 1904 - ornate harvestmen Superfamily Acropsopilionoidea Roewer, 1923 [monotypic] Family †Halithersidae Dunlop, Selden & Giribet, 2016 1 Genus †Halithersesᵀ Giribet & Dunlop, 2005