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 Bunonematina Siddiqi, 1980
               Superfamily Bunonematoidea Micoletzky, 1922
                 1 Family Bunonematidae Micoletzky, 1922
                 2 Family Pterygorhabditidae Goodey, 1963