Kingdom Animalia Linnaeus, 1758 - animals Phylum Platyhelminthes Gegenbaur, 1859 - flatworms Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831 Order Prolecithophora Karling, 1940 Genus Urostoma see Genus Urastoma Doerler, 1900