Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Platy-helminthes see Phylum Platyhelminthes Gegenbaur, 1859
           Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
             Superorder Archoophora see Class Turbellaria Ehrenberg, 1831
               Order Polycladida Lang, 1884
                 1 Genus Stylochus Ehrenberg, 1831
                 2 Genus Graffizoon Heath, 1928
                 3 Genus Notoplana Laidlaw, 1903
                 4 Genus Discocoelis see Genus Discocelis Ehrenberg, 1836
                 5 Genus Prostheceraeus Schmarda, 1859
                 6 Genus Thysanozoon Grube, 1840
                 7 Genus Yungia Lang, 1884