Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Torquentia Order Chromadorida Chitwood, 1933 Suborder Desmodorina De Coninck, 1965 Family Desmodoridae Filipjev, 1922