Nematoda Gegenbaur, 1859 - round worms
   Secernentea Von Linstow, 1905
     Tylenchia (Thorne, 1949) Inglis, 1983
       Tylenchida G. Thorne, 1949
         Tylenchina Chitwood, 1950
           Tylenchata (Thorne, 1949) M.R. Siddiqi, 2000
             Tylenchoidea Örley, 1880
               Tylodoridae Paramonov, 1967
                 Epicharinematinae Maqbool & Shahina, 1985
                   1 Epicharinema Raski, Maggenti, Koshy & Sosamma, 1980
                   2 Gracilancea Siddiqi, 1976