In her earlier paper (Jackiewicz, 1959) the author distinguished within the complex species Galba palustris (O. F. Müller, 1774) the three species: Galba corvus Gmelin, 1788, G. turricula Held, 1836, and G. occulta Jackiewicz, 1959. The species were distinguished mainly on a basis of the characters of their reproductive organs. In the present paper it is shown that, owing to the characters of both its reproductive organs and shell.
G. corvus is most closely related to Lymnaea vulnerata (Küster, 1862) and L. stagnalis (Linnaeus, 1758). However, the latter three species are markedly different from other lymnaeids, so that it seems justified to create within the genus Lymnaea Lamarck, 1799 the new separate subgenus Lymnaea s. stricto, for the three species to be placed in it.