Phylum Nematoda Gegenbaur, 1859 - round worms
Class Secernentea Von Linstow, 1905
Subclass Tylenchia (Thorne, 1949) Inglis, 1983
Order Tylenchida G. Thorne, 1949
Suborder Hexatylina Siddiqi, 1980
Superfamily Sphaerularioidea Lubbock, 1861
Family Allantonematidae Pereira, 1931
1 Subfamily Allantonematinae Pereira, 1931
2 Subfamily Contortylenchinae Rühm, 1956