Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Order Opiliones Sundevall, 1833 - harvestmen
           Suborder Dyspnoi Hansen & Sørensen, 1904 - ornate harvestmen
             Superfamily Troguloidea Sundevall, 1833
               1 Family Dicranolasmatidae Simon, 1879
               2 Family †Eotrogulidae Petrunkevitch, 1955 [monotypic]
               3 Family Nemastomatidae Simon, 1872
               4 Family †Nemastomoididae Petrunkevitch, 1955
               5 Family Nipponopsalididae Martens, 1976
               6 Family Trogulidae Sundevall, 1833