Phylum Nematoda Gegenbaur, 1859 - round worms
   Class Secernentea Von Linstow, 1905
     Subclass Tylenchia (Thorne, 1949) Inglis, 1983
       Order Tylenchida G. Thorne, 1949
         Suborder Hoplolaimina Chizhov & Berezina, 1988
           Superfamily Dolichodoroidea (Chitwood, in Chitwood & Chitwood, 1950) Siddiqi, 1986 see Superfamily Tylenchoidea Örley, 1880
             1 Family Dolichodoridae Chitwood, 1950
             2 Family Belonolaimidae Whitehead, 1959
             3 Family Telotylenchidae Siddiqi, 1960
             4 Family Psilenchidae Paramonov, 1967