Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Chromadorea Inglis, 1983
       Subclass Plectia Hodda, 2007
         Superorder Rhabditica Hodda, 2007
           Order Rhabditida Chitwood, 1933
             Suborder Rhabditina Chitwood, 1933
               Superfamily Rhabditoidea Örley, 1880
                 1 Family Diploscapteridae Chitwood & Chitwood, 1937
                 2 Family Rhabditidae Örley, 1880