Heterostropha Species of the Turkish Coasts: Odostomiinae Pelseneer, 1928 (Gastropoda, Heterobranchia, Pyramidellidae)

The present paper deals with Odostomiinae species distributed along the Turkish coasts. The examination of a material sampled from different depths (0-875 m) and biotopes between 1996 and 2011 resulted in identification of 20 Odostomia (O. acuta, O. angusta, O. barashi, O. carrozzai, O. conoidea, O. conspicua, O. erjaveciana, O. eulimoides, O. megerlei, O. kromi, O. improbabilis, O. lorioli, O. lukisii, O. plicata, O. scalaris, O. sicula, O. silesui, O. turriculata, O. turrita and O. unidentata), 2 Liostomia (L. afzelii and L. clavula) 1 Noemiamea (N. dolioliformis) and 5 Ondina (O. anceps, O. crystallina, O. diaphana, O. vitrea and O. warreni) species. Among the identified species, Odostomia silesui and Ondina anceps are new records for the eastern Mediterranean, Liostomia afzelii is new for the Levantine and Aegean Seas, Odostomia megerlei is new for the Levantine Sea, Odostomia angusta, O. barashi and O. lorioli are new for the Aegean Sea molluscan fauna, Odostomia carrozzai is new for the Turkish mollusc fauna, Odostomia unidentata is new for the Turkish Levantine and Aegean Seas, Liostomia clavula is new for the Turkish Levantine coast and 6 species (Odostomia conspicua, O. kromi, O. improbabilis, O. lukisii, O. turrita and Ondina diaphana) are new ones for the Turkish Aegean Sea fauna. Of the identified species, Odostomia conoidea is the most abundant and widely distributed species along the Turkish coasts, whereas Odostomia angusta, O. barashi, O. megerlei, Ondina anceps and O. crystallina are species with restricted distribution. Odostomia silesui is the deepest living Odostomiinae species among the dealed with herein. In the present study, some ecological and distributional features and taxonomic remarks, with colour photographs of the identified species, are given