Chelicerata Heymons, 1901
   Opiliones Sundevall, 1833 - harvestmen
     Phalangida Bristowe, 1949
       Suborder Laniatores Thorell, 1876 - armored harvestmen
         Infraorder Grassatores Kury, 2002
           Superfamily Samoidea Gerlach, 2010, orth. inval. see Superfamily Samooidea Sørensen, 1886
             1 Family Biantidae Thorell, 1889
             2 Family Escadabiidae Kury & Pérez-González, 2003
             3 Family Kimulidae Pérez-González, Kury & Alonso-Zarazaga, 2007
             4 Family Podoctidae Roewer, 1912
             5 Family Samoidae Sørensen, 1886
             6 Family Stygnommatidae Roewer, 1923