Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Enoplea Inglis, 1983
       Subclass Triplonchia Hodda, 2007 [monotypic]
         Superorder Triplonchica Hodda, 2007
           Order Tripylida Siddiqi, 1983
             Suborder Prismatolaimina Hodda, 2011
               1 Superfamily Onchuloidea Andrassy, 1964 [monotypic]
               2 Superfamily Prismatolaimoidea Micoletzky, 1922