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.