Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Torquentia 1 Order Monhysterida Filipjev, 1929 2 Order Desmoscolecida Filipjev, 1929 [monotypic] 3 Order Araeolaimida see Suborder Araeolaimina De Coninck, 1965 4 Order Chromadorida Chitwood, 1933