Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Chromadorea Inglis, 1983
       Subclass Chromadoria Adamson, 1987 [monotypic]
         Superorder Chromadorica Hodda, 2007
           1 Order Chromadorida Chitwood, 1933 [monotypic]
           2 Order Desmodorida De Coninck, 1965 [monotypic]
           3 Order Desmoscolecida Filipjev, 1929 [monotypic]
           4 Order Selachinematida Hodda, 2011 [monotypic]