Chelicerata Heymons, 1901 Opiliones Sundevall, 1833 - harvestmen Phalangida Bristowe, 1949 Suborder Laniatores Thorell, 1876 - armored harvestmen Infraorder Grassatores Kury, 2002 Superfamily Zalmoxoidea Sørensen, 1886 Family Fissiphalliidae Martens, 1988