Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Dorylaimea Hodda, 2007
       Subclass Bathyodontia Hodda, 2007 [monotypic]
         Superorder Mononchica Hodda, 2007
           Order Bathyodontida Siddiqi, 1983 [monotypic]
             Suborder Bathyodontina Coomans & Loof, 1970
               Superfamily Cryptonchoidea Chitwood, 1937
                 1 Family Bathyodontidae Clark, 1961
                 2 Family Cryptonchidae Chitwood, 1937