Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Enoplea Inglis, 1983
       Subclass Enoplia Pearse, 1942
         Superorder Enoplica Hodda, 2007
           Order Ironida Hodda, 2007
             1 Suborder Ironina Siddiqi, 1983 [monotypic]
             2 Suborder Oxystominina Siddiqi, 1983 [monotypic]
             3 Suborder Rhabdolaimina Hodda, 2011 [monotypic]
             4 Suborder Campydorina Jairajpuri, 1983 [monotypic]