Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
   Class Nematoda Gegenbaur, 1859
     Subclass Secernentia (Von Linstow, 1905) Andrássy, 1976
       Order Rhabditida Chitwood, 1933
         Suborder Diplogasterina Paramonov, 1952 see Suborder Diplogastrina Paramonov, 1952
           Family Diplogasteridae Micoletzky, 1922 see Family Diplogastridae Micoletzky, 1922