Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
   Class Nematoda Gegenbaur, 1859
     Subclass Penetrantia
       Order Dorylaimida Pearse, 1942
         Suborder Mononchina Kirjanova & Krall, 1969
           64 Family Bathyodontidae Clark, 1961
           65 Family Mononchidae Filipjev, 1934
           66 Family Anatonchidae Jairajpuri, 1969