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 Mononchida Jairajpuri, 1969 [monotypic]
             Suborder Mononchina Kirjanova & Krall, 1969
               Superfamily Anatonchoidea Jairajpuri, 1969
                 1 Family Anatonchidae Jairajpuri, 1969
                 2 Family Iotonchidae Jairajpuri, 1969