Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Chromadorea Inglis, 1983
       Subclass Plectia Hodda, 2007
         Superorder Rhabditica Hodda, 2007
           Order Spirurida Railliet, 1914
             Suborder Spirurina Railliet & Henry, 1915
               01 Superfamily Acuarioidea Railliet, Henry & Sisoff, 1912 [monotypic]
               02 Superfamily Aproctoidea Yorke & Maplestone, 1926
               03 Superfamily Camallanoidea Railliet & Henry, 1915
               04 Superfamily Diplotriaenoidea Skrjabin, 1916 [monotypic]
               05 Superfamily Filarioidea Weinland, 1858
               06 Superfamily Habronematoidea Chitwood & Wehr, 1932
               07 Superfamily Lucionematoidea Moravec, Molnar & Szekely, 1998 [monotypic]
               08 Superfamily Rictularioidea Hall, 1913 [monotypic]
               09 Superfamily Spiruroidea Oerley, 1885
               10 Superfamily Thelazioidea Railliet, 1910