Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
   Class Nematoda Gegenbaur, 1859
     Subclass Penetrantia
       Order Enoplida Filipjev, 1929
         Suborder Tripylina Andrassy, 1974
           Family Odontolaimidae Gerlach & Riemann, 1974