Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859
   Class Nematoda Gegenbaur, 1859
     Subclass Penetrantia
       Order Dorylaimida Pearse, 1942
         Suborder Dorylaimina Chitwood, 1933
           Family Leptonchidae Thorne, 1935
             Genus Tylencholaimellus Cobb, in M.V. Cobb, 1915