Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Chromadorea Inglis, 1983
       Subclass Chromadoria Adamson, 1987 [monotypic]
         Superorder Chromadorica Hodda, 2007
           Order Selachinematida Hodda, 2011 [monotypic]
             Suborder Selachinematina Hodda, 2011 [monotypic]
               Superfamily Selachinematoidea Cobb, 1915
                 1 Family Choanolaimidae Filipjev, 1926
                 2 Family Choniolaimidae Schuurmans Stekhoven & Adam, 1931
                 3 Family Richtersiidae Kreis, 1929
                 4 Family Selachinematidae Cobb, 1915