Kingdom Animalia Linnaeus, 1758 - animals Phylum Platyhelminthes Gegenbaur, 1859 - flatworms Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831 Order Acoela Uljanin, 1870 - acoels see Class Acoela Uljanin, 1870 Genus Convoluta Oersted, 1843