Radix (Peregriana) tumida (Held, 1836) sensu Kruglov & Starobogatov

Marinskiy, Vadim V., 2017, Checklist of the freshwater snails (Mollusca: Gastropoda) of Mongolia, Zootaxa 4317 (1), pp. 45-78 : 59

Radix (Peregriana) tumida (Held, 1836) sensu Kruglov & Starobogatov

( Table 5; fig. 5 H )

Regional distribution. We found SeVeral SpecimenS phenotypically reSembling Radix tumida SenSu KrugloV & StarobogatoV (1993b) in a branch of a riVer inflowing to the Airag Nuur Lake, WeStern Mongolia (See Appendix). Extra-limital distribution. Europe and Siberia ( KrugloV 2005; VinarSki & Kantor 2016).

Remarks. KrugloV & StarobogatoV (1993b; KrugloV 2005) deScribe thiS taxon aS a SpecieS of Peregriana conchologically intermediate between Radix balthica and R. ampla (Hartmann, 1821) . The taxonomic diStinctneSS of R. tumida aS well aS itS true identity remain controVerSial. Glöer (2002) treated it aS a Variety of R. auricularia , whereaS moSt WeStern European malacologiStS did not accept it aS a Separate taxon of any rank (e.g. Welther- SchulteS 2012). PoSSibly, R. tumida SenSu KrugloV & StarobogatoV iS a Synonym of Some other SpecieS of the SubgenuS Peregriana .

Figures

FIGURE 5. Shells of the lymnaeid snails discUssed in the paper (continUation). A— Limnaea auricularia morpha kosogolensis, a syntype (ZIN, leg. Mikhno, det. Lindholm). B— Radix obliquata (06.1978, Uvs NUUr Depression, an Unnamed lake, leg. Lobachev, ZIN). C— R. lagotis (01.08.2011, Khar NUUr Lake, UnknoWn collector, LIN). D— R. obliquata, shell spire, enlarged (19.07.2012, Khar Us NUUr Lake, leg. Vinarski). E— R. zazurnensis (21.07.1990, KhUrkh River in the Onon River basin, leg. DUlmaa, ZIN). F— Lymnaea nogoonica, the holotype (22.08.1978, a lake near Kosh-Agach settlement near the RUssian- Mongolian border, leg. Starobogatov, ZIN). G— L. tsalolikhini, the holotype (27.06.1978, a bay of the Nogoon Lake, leg. Tsalolikhin, ZIN). H— R. tumida (23.07.2012, branch of a river infloWing to the Airag NUUr Lake, leg. Vinarski). I— Orientogalba viridis (20.08.1976, Khovd River, leg. Zhaltsanova). J— O. hookeri (10.06.1987, Bayan NUUr Lake, 80 km E from the Uvs NUUr Lake, leg. Tsalolikhin, ZIN). K— R. kurejkae (27.06.1978, a bay of the Nogoon Lake, leg. Tsalolikhin, ZIN). Scale bars: 2 mm (A, C, E – K), 5 mm (B). All photos are original, except of I (photo made by Ivan Nekhaev).