Gyraulus chinensis ( Dunker, 1848 )

Marinskiy, Vadim V., 2017, Checklist of the freshwater snails (Mollusca: Gastropoda) of Mongolia, Zootaxa 4317 (1), pp. 45-78 : 65

Gyraulus chinensis ( Dunker, 1848)

( Table 6, figS. 6 I, J)

Regional distribution. According to our data, G. chinensis iS Very widely diStributed in Mongolia and dwellS there in habitatS of VariouS type, large mountain lakeS to Shallow floodplain poolS. To the beSt of our knowledge, G. chinensis waS not regiStered in thiS country by preViouS workerS (See Table 1), though it might haVe been mentioned under other nameS Such aS Anisus acronicus ( StarobogatoV 1970) and A. (Gyraulus) borealis (ProzoroVa et al. 2009) . SeVeral empty ShellS of Mongolian planorbidS identified aS Anisus (G.) draparnaldi (Sheppard, 1823) and examined by uS in ZIN proVed to be SpecimenS of G. chinensis .

Extra-limital distribution. ThiS Snail iS Very common in different partS of Central and South ASia (Meier- Brook 1983; Glöer et al. 2014) and New Guinea ( Appleton & Miranda 2015). AlSo it haS been regiStered aS a nonindigenouS SpecieS in Europe ( Glöer 2002; Beran & Glöer 2006), WeSt IndieS, AuStralia, and different African countrieS ( Appleton & Miranda 2015).

Morphology. ThiS commonneSt in Mongolia SpecieS of Gyraulus can be defined conchologically aS haVing a Shell without Spiral Scupture whoSe Surface iS almoSt Smooth or, more often, coVered by well ViSible axial Striae (See fig. 6 I). The periphery of the body whorl iS eVenly rounded. Such featureS alongSide with the Structure of the copulatiVe organ and the proState (See fig. 6 J) correSpond to morphological characteriSticS of G. chinensis giVen by Meier-Brook (1983) and Appleton & Miranda (2015).

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).