Phylum Nematoda Gegenbaur, 1859 - round worms
   Class Secernentea Von Linstow, 1905
     Subclass Tylenchia (Thorne, 1949) Inglis, 1983
       Order Tylenchida G. Thorne, 1949
         Suborder Criconematina Siddiqi, 1980
           Superfamily Hemicycliophoroidea (Skarbilovich, 1959) Siddiqi, 1980 see Superfamily Criconematoidea Taylor, 1936 (1914)
             1 Family Hemicycliophoridae Skarbilovich, 1959
             2 Family Caloosiidae Siddiqi, 1980