Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
   Class Nematoda Gegenbaur, 1859
     Subclass Torquentia
       Order Chromadorida Chitwood, 1933
         1 Suborder Chromadorina Filipjev, 1929
         2 Suborder Cyatholaimina
         3 Suborder Desmodorina De Coninck, 1965