Nematoda Gegenbaur, 1859 - round worms
   Secernentea Von Linstow, 1905
     Tylenchia (Thorne, 1949) Inglis, 1983
       Tylenchida G. Thorne, 1949
         Hoplolaimina Chizhov & Berezina, 1988
           Dolichodoroidea (Chitwood, in Chitwood & Chitwood, 1950) Siddiqi, 1986 see Superfamily Tylenchoidea Örley, 1880
             Telotylenchidae Siddiqi, 1960
               Telotylenchinae Siddiqi, 1960
                 Bitylenchus (Filipjev, 1934) Jairajpuri, 1982