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 Tylenchuloidea (Skarbilovich, 1947) Raski & Siddiqi, 1975 see Superfamily Criconematoidea Taylor, 1936 (1914)
             Family Tylenchulidae Skarbilovich, 1947
               Subfamily Tylenchulinae Skarbilovich, 1947
                 Genus Tylenchulus Cobb, 1913