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 Sphaerularioidea Lubbock, 1861
                 1 Family Allantonematidae Pereira, 1931
                 2 Family Iotonchiidae Goodey, 1953
                 3 Family Neotylenchidae Thorne, 1941
                 4 Family Parasitylenchidae Siddiqi, 1986
                 5 Family Sphaerulariidae Lubbock, 1861