Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Phalangida Bristowe, 1949
       Suborder Eupnoi Hansen & Sørensen, 1904 - daddy longlegs
         Superfamily Phalangioidea Latreille, 1802
           1 Genus †Petrunkevitchiana Mello-Leitão, 1937, incertae sedis
           2 Family Monoscutidae Forster, 1948 see Subfamily Enantiobuninae Mello-Leitão, 1931
           3 Family Neopilionidae Lawrence, 1931
           4 Family Phalangiidae Latreille, 1802
           5 Family Protolophidae Banks, 1893
           6 Family Sclerosomatidae Simon, 1879