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
                 Genus Stylochus Ehrenberg, 1831
                   1 Stylochus zebra (Verrill, 1882)
                   2 Stylochus pilidium (Goette, 1881) see Stylochus pillidum (Goette, 1881) Lang, 1884
                   3 Stylochus frontalis Verrill, 1893