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 Criconematoidea Taylor, 1936 (1914)
                 1 Family Criconematidae Taylor, 1936 (1914)
                 2 Family Hemicycliophoridae Skarbilovich, 1959
                 3 Family Paratylenchidae Thorne, 1949
                 4 Family Sphaeronematidae Raski & Sher, 1952
                 5 Family Tylenchulidae Skarbilovich, 1947