Three species of the Vitrinidae are known from Turkey, Vitrina pellucida, Gallandia annularis, and Gallandia olympica. Vitrina pellucida differs from the two Turkish Gallandia species in the smooth, more globose shell with more rapidly increasing whorls, the presence of shell lobes, the slender penis with a penial tunica, the lack of the vagina and of the glandula amatoria. Gallandia olympica sp. nov. differs from G. annularis in the generally imperforate, ribbed shell, the distinctly longer vagina and the partly multicuspid radular marginals. Whereas V. pellucida and G. annularis are holarctic resp. W-palaearctic species, G. olympica is known only from a part of NW-Turkey belonging to the Pontic region. Gallandia is a genus of the Phenacolimax group of the Vitrinidae, which is characterized by the following autapomorphies: shell conoid-globose, shell and mantle lobes reduced, free oviduct short, pedunculus short, penis short. It includes the species G. annularis (Studer), G. olympica sp. nov., G. lederi (O. Boettger) and possibly the anatomically unknown Vitrina subconica O. Boettger. The phylogenetic relationships of the anatomically known species are shown in a cladogram (fig. 13). G. lederi, the type species of Trochovitrina, is the sister species of G. olympica. Therefore the separation of Trochovitrina is not accepted.
