Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
       01 Order Nemertodermatida Karling, 1940 - nemertodermatids
       02 Order Acoela Uljanin, 1870 - acoels see Class Acoela Uljanin, 1870
       03 Order Catenulida Meixner, 1924 - catenulid flatworms
       04 Order Macrostomida
       05 Order Lecithoepitheliata
       06 Order Rhabdocoela Ehrenberg, 1831 see Infraclass Rhabdocoela Ehrenberg, 1831
       07 Order Prolecithophora Karling, 1940
       08 Order Proseriata Meixner, 1938
       09 Order Tricladida Lang, 1884
       10 Order Polycladida Lang, 1884