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 Tylenchina Chitwood, 1950
               Superfamily Anguinoidea Nicoll, 1935 (1926)
                 Family Anguinidae Nicoll, 1935 (1926)