Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Torquentia Order Chromadorida Chitwood, 1933 Suborder Cyatholaimina Family Ethmolaimidae Filipjev & Schuurmans Stekhoven, 1941