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 Tripylina Andrassy, 1974
               Superfamily Tobriloidea Filipjev, 1918
                 1 Family Pandolaimidae Belogurov, 1980
                 2 Family Rhabdodemaniidae Filipjev, 1934
                 3 Family Tobrilidae Filipjev, 1918
                 4 Family Triodontolaimidae De Coninck, 1965