Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Phalangida Bristowe, 1949
       Suborder Laniatores Thorell, 1876 - armored harvestmen
         Infraorder Grassatores Kury, 2002
           1 Superfamily Samoidea Gerlach, 2010, orth. inval. see Superfamily Samooidea Sørensen, 1886
           2 Superfamily Assamioidea Sørensen, 1884
           3 Superfamily Gonyleptoidea Sundevall, 1833
           4 Superfamily Phalangodoidea Simon, 1879
           5 Superfamily Zalmoxoidea Sørensen, 1886