Bathyomphalus contortus (Linnaeus, 1758)

Marinskiy, Vadim V., 2017, Checklist of the freshwater snails (Mollusca: Gastropoda) of Mongolia, Zootaxa 4317 (1), pp. 45-78 : 64

Bathyomphalus contortus (Linnaeus, 1758)

( fig. 6 G)

Regional distribution. ThiS Euro-Siberian SpecieS occurS only in WeStern Mongolia. Three Mongolian localitieS of B. contortus are known to the date: 1) Chono-Khoraikh gol RiVer (15.07.2012, leg. M.V. VinarSki), 2) Dorgon reSerVoir (26.08.2014, leg. A.A. Prokin), and 3) Nogoon Lake (18.06.1981, leg. D.-S. D. ZhaltSanoVa).

Extra-limital distribution. Northern and Central Palearctic ( Glöer 2002; VinarSki & Kantor 2016).

Morphology. The Mongolian repreSentatiVeS of thiS SpecieS (See fig. 6 C) are almoSt indiStinguiShable from indiVidualS of B. contortus liVing in Europe and WeStern Siberia.

Figures

FIGURE 6. Shells and genitalia of Physidae and Planorbidae discUssed in the paper. A— Physa fontinalis (19.06.2010, a channel of the Kherlen River, leg. Palatov). B— Ph. dalmatina / taslei (09.06.1996, Hövsgöl Lake near Khankh River moUth, leg. Sitnikova, LIN). C— Sibirenauta tuwaensis, a paratype (Eter River, leg. Potanin, ZIN). D— Armiger annandalei, Afghanistan, a sWamp near Vazirabad (after Likharev & Starobogatov 1967, fig. 9). E— A. annandalei from Mongolia (14.08.2012, Khait Dalai NUUr lake, leg. Palatov). F— A. crista (15.08.2012, Dorgon Water reservoir, leg. Prokin). G— Bathyomphalus contortus (15.07.2012, Chono-Khoraikhgol River, leg. Vinarski). H— Choanomphalus mongolicus (20.07.1997, Hövsgöl Lake, leg. Sitnikova, LIN). I, J—Shell, copUlative organ and prostate of Gyraulus chinensis (23.07.2012, Airag NUUr Lake, leg. Vinarski). K— G. sibiricus var. major (1877, Eter River, leg. Potanin, det. Martens, ZIN). Scale bars: 1 mm (A, D – F, H – J), 2 mm (B, C, K). All photos are original, except of I, J (made by Peter Glöer).