Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Phalangida Bristowe, 1949
       Suborder Laniatores Thorell, 1876 - armored harvestmen
         Infraorder Insidiatores Loman, 1900
           Superfamily Triaenonychoidea Sørensen, 1886
             1 Family Synthetonychiidae Forster, 1954
             2 Family Triaenonychidae Sørensen, 1886