Kingdom Animalia Linnaeus, 1758 - animals Phylum Platyhelminthes Gegenbaur, 1859 - flatworms Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831 Order Rhabdocoela Ehrenberg, 1831 see Infraclass Rhabdocoela Ehrenberg, 1831 Suborder Dalyellioida (L. v. Graff, 1905) Bresslau, 1933 see Suborder Dalyelliida Genus Callastoma see Genus Collastoma Doerler, 1900