The freshwater snails (Gastropoda) of Iran, with descriptions of two new genera and eight new species Gloeer, Peter Pesic, Vladimir ZooKeys 2012 2012-09-04 219 11 61 urn:lsid:zoobank.org:act:22D0892E-8670-4131-9149-0F77C007BB94 Glöer & Pešić, 2012 Glöer & Pešić 2012 Gastropoda Bithyniidae Bithynia GBIF,CoL Animalia Bithynia (Bithynia) mazandaranensis Littorinimorpha 7 18 Mollusca species mazandaranensis sp. n. Bithynia  Type locality. Mazandaran Province, Nowshahr city, pond near Caspian Sea, 51°31'E, 36°38'N, 18 June 2005.  Holotype (ZMH 79369):Shell height 8.0 mm, width 5.0 mm.  Etymology. Named after the region where the species was collected.  Description. The horn-coloured shell is conical with 5.5 whorls, which are slightly convex with a clear suture and an acute apex. The umbilicus is closed. The aperture is ovate, angled at the top. The margin of the aperture is, from lateral view, sinuated. The surface bears a lattice structure. Shell height 8.0 mm, width 5.0 mm, aperture height 3.6 mm.  Differentiating features. The new species resembles  Bithynia tentaculatabut differs from it by the following features: (i) the operculum is more angled ( Fig. 7c), (ii) the whorls are more convex ( Fig. 7a-b), and (iii) the surface has longitudinal and transverse striae ( Fig. 7d).  Associated species.   Planorbis carinatus,  Anisussp.,  Valvata cristata,  Valvata nowshahrensissp. n.,  Hippeutis complanatus.  Remarks. Probably this species formerly (e.g., Mansoorian 2000) was confused with  Bithynia tentaculata. Because we had only an empty shell of this species, we do not know if it belongs to the genus  Bithyniaor  Pseudobithynia, so our generic assignment is tentative. To address this question, anatomical studies of more specimens are necessary.