living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
           Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
             Order Neorhabdocoela see Order Rhabdocoela Ehrenberg, 1831
               Suborder Kalyptorhynchia Graff, 1905 see Order Kalyptorhynchia Graff, 1905
                 Section Eukalyptorhynchia Meixner, 1928
                   Family Cystiplanidae Karling, 1964
                     Genus Nigerrhynchus Schilke, 1970