Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Phalangida Bristowe, 1949
       Suborder Dyspnoi Hansen & Sørensen, 1904 - ornate harvestmen
         1 Genus †Ameticos Garwood, Dunlop, Giribet & Sutton, 2011
         2 Genus †Echinopustulatus Dunlop, Penney & Jekel, 2010, orth. inval. see Genus Echinopustulus Dunlop, 2004
         3 Superfamily Acropsopilionoidea Roewer, 1923 [monotypic]
         4 Family †Halithersidae Dunlop, Selden & Giribet, 2016 [monotypic]
         5 Superfamily Ischyropsalidoidea Simon, 1879
         6 Superfamily Troguloidea Sundevall, 1833