Order Opiliones Sundevall, 1833 - harvestmen Suborder Laniatores Thorell, 1876 - armored harvestmen Infraorder Grassatores Kury, 2002 Superfamily Gonyleptoidea Sundevall, 1833 Family Agoristenidae Šilhavý, 1973 Subfamily Leiosteninae Šilhavý, 1973 Genus Leptostygnus Mello-Leitão, 1940