Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Chromadorea Inglis, 1983
       Subclass Plectia Hodda, 2007
         Superorder Rhabditica Hodda, 2007
           Order Panagrolaimida Hodda, 2007
             Suborder Panagrolaimina Hodda, 2007
               Superfamily Strongyloidoidea Chitwood & McIntosh, 1934
                 1 Family Strongyloididae Chitwood & McIntosh, 1934
                 2 Family Rhabdiasidae Railliet, 1916