Order Opiliones Sundevall, 1833 - harvestmen
   Phalangida Bristowe, 1949
     Suborder Laniatores Thorell, 1876 - armored harvestmen
       Grassatores Kury, 2002
         Superfamily Samooidea Sørensen, 1886 [paraphyletic]
           1 Family Samoidae Sørensen, 1886
           2 Family Biantidae Thorell, 1889