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 Aphelenchina Geraert, 1966
               Superfamily Aphelenchoidoidea Skarbilovich, 1947
                 1 Family Acugutturidae Hunt, 1980
                 2 Family Aphelenchoididae Skarbilovich, 1947
                 3 Family Berntsenidae Hodda, 2003
                 4 Family Ektaphelenchidae Paramonov, 1964
                 5 Family Entaphelenchidae Nickle, 1970
                 6 Family Parasitaphelenchidae Ruehm, 1956
                 7 Family Seinuridae Husain & Khan, 1967