organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Eumetazoa Bütschli, 1910 - eumetazoans
       Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
         Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
           Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
             Parenchymia
               Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
                 Euplathelminthes see [unranked] Rhabditophora Ehlers, 1985
                   Rhabditophora Ehlers, 1985 see Subphylum Rhabditophora Ehlers, 1985
                     Trepaxonemata see [unranked] Rhabditophora Ehlers, 1985
                       Order Polycladida Lang, 1884
                         Genus Prostheceraeus Schmarda, 1859
                           Prostheceraeus vittatus (Montagu)