[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
       Order Rhabdocoela Ehrenberg, 1831 see Infraclass Rhabdocoela Ehrenberg, 1831
         Suborder Kalyptorhynchia Graff, 1905 see Order Kalyptorhynchia Graff, 1905
           01 Family Acrumenidae
           02 Family Aculeorhynchidae Schilke, 1969
           03 Family Bertiliellidae Rieger & Sterrer, 1975
           04 Family Cicerinidae Meixner, 1928
           05 Family Cystiplanidae Karling, 1964
           06 Family Cytocystidae
           07 Family Diascorhynchidae Meixner, 1929
           08 Family Gnathorhynchidae Meixner, 1929
           09 Family Karkinorhynchidae Meixner, 1928
           10 Family Koinocystididae Meixner, 1924
           11 Family Nematorhynchidae Schilke, 1969
           12 Family Placorhynchidae Meixner, 1938
           13 Family Polycystididae Graff, 1905
           14 Family Psammorhynchidae Karling, 1956
           15 Family Schizorhynchidae Graff, 1905