Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Torquentia Order Desmoscolecida Filipjev, 1929 [monotypic] Suborder Desmoscolecina Chitwood, 1933 Family Desmoscolecidae Shipley, 1896