Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Platy-helminthes see Phylum Platyhelminthes Gegenbaur, 1859
           Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
             Superorder Neoophora see Class Neoophora
               Order Seriata
                 Suborder Tricladida Lang, 1884 see Order Tricladida Lang, 1884
                   Paludicola Hallez, 1892
                     Genus Crenobia Kenk, 1930
                       Crenobia alpina (Dana, 1766)
                         1 Crenobia alpina septentrionalis (Thienemann, 1766)
                         2 Crenobia alpina meridionalis (Thienemann, 1938)