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 Tricladida Lang, 1884
               Suborder Terricola Hallez, 1892 see [unranked] Terricola Hallez, 1892
                 1 Family Rhynchodemidae Graff, 1896
                 2 Family Geoplanidae Stimpson, 1857
                 3 Family Bipaliidae Stimpson, 1857
                 4 Genus Digonopyla Fischer, 1926
                 5 Genus Cotyloplana Spencer, 1892
                 6 Genus Limacopsis Graff, 1899