Ampullaceana dipkunensis (Gundrizer & Starobogatov, 1979)

Vinarski, Maxim V., Aksenova, Olga V. & Bolotov, Ivan N., 2020, Taxonomic assessment of genetically-delineated species of radicine snails (Mollusca, Gastropoda, Lymnaeidae), Zoosystematics and Evolution 96 (2), pp. 577-608 : 577

12. Ampullaceana dipkunensis (Gundrizer & Starobogatov, 1979) Figs 7E, F ; 8C ; Table 2

Lymnaea peregra - Hubendick 1951: 146, figs 1, 9 (partim).

Lymnaea dipkunensis Gundrizer and Starobogatov 1979: 1134, fig. 1(4).

Lymnaea (Peregriana) dipkunensis - Kruglov and Starobogatov 1993b: 164, fig. 2B (partim).

Lymnaea (Peregriana) tumida - Kruglov and Starobogatov 1993b: 166, fig. 6G, non Held 1836 (partim).

Radix (Peregriana) dipkunensis - Vinarski and Kantor 2016: 332 (partim).

Radix (Peregriana) tumida - Vinarski and Kantor 2016: 336, non Held 1836 (partim).

Ampullaceana cf. dipkunensis - Aksenova et al. 2018a: 4.

TL.

Russia, Krasnoyarsk Territory, Gornoye Lake in the floodplain of the Kureika River upstream of the mouth of the Dipkun River.

Holotype.

ZISP (see Sitnikova et al. 2014).

A species characterised by a broad shell with well-developed aperture, relatively-low spire and inflated body whorl. Its range covers European North of Russia and Eastern Europe ( Aksenova et al. 2018a). Anistratenko et al. (2018) mentioned it (as Radix tumida ) from the Western Ukraine. Specimens, morphogically identified as R. tumida , are known from the Urals, Western and Eastern Siberia ( Gundrizer 1984; Kruglov 2005; Khokhutkin et al. 2009; Andreeva et al. 2010).

Conchologically, A. dipkunensis resembles A. ampla , but differs from the latter by a slightly higher spire and less inflated aperture. Besides, Kruglov (2005) reported some differences in the proportions of the copulatory organs of these two snails. As was stated above, the penis sheath in A. ampla is slightly longer than the praeputium, whereas, in A. dipkunensis , one may observe an opposite state. According to Kruglov (2005), the praeputium of R. tumida is around 1.7 times longer than the penis sheath. In a sample containing 103 specimens of this species, collected from four localities in Russia, the mean ICA value was 1.84 ± 0.22 (limits of variation: 1.37-2.44) [Vinarski, unpublished data].

Taxonomic remark.

Aksenova et al. (2018a) genetically studied some specimens of radicine snails identified as Lymnaea (Peregriana) tumida Held, 1836 sensu Kruglov and Starobogatov (1983b, 1993b) and showed that it is a valid species, distinct from A. ampla . However, to use this species name is hardly acceptable. This taxon is usually considered as an intraspecific morph of Radix auricularia living in large Alpine lakes ( Geyer 1927; Glöer 2002). Examination of the topotypes (dried shells) of L. tumida , kept in different European museums ( NHMW, NMG, ZMUC), allowed Aksenova et al. (2018a) to agree with this opinion. Therefore, the authors used the next oldest available name, Lymnaea dipkunensis Gundrizer et Starobogatov, 1979, to designate this clade. The identity of this taxon was revealed by means of the inspection of the type series (see also Sitnikova et al. 2014). The records of Lymnaea tumida sensu Kruglov and Starobogatov in the Lower Yenissei Basin ( Gundrizer 1984), the type region of L. dipkunensis , give indirect evidence in favour of their identity. However, this taxonomic hypothesis is in need of future integrative research using the topotypes of L. dipkunensis .

Figures

Figure 7. Shells of species of the genera Ampullaceana and Peregriana. A. Ampullaceana ampla (Austria, Wallersee Lake; NHMW). B. A. ampla (Germany, Neckarsteinach; NHMUK). C. A. balthica (14.12.1946, Denmark, Fureso Lake; ZMUC). D. A. balthica (Sweden, Stockholm; NMG). E. A. dipkunensis (Russia, Arkhangelsk Region, Nyandomka River; LMBI). F. A. dipkunensis, the holotype (07.07.1977, Russia, Krasnoyarsk Territory, Gornoye Lake; ZISP). G. Limneus fontinalis, the lectotype (after Forcart 1957). H. A. fontinalis (18.08.2017, Russia, Rostov Region, Veselovskoye Reservoir; LMBI). I. Limneus intermedius (France, Lyon; NHMW). J. A. lagotis (Russia, Leningrad Region, Lava River near Troitskoye; ZISP). K. A. lagotis (Austria, Buergenland, Bodersdorf; NHMW). L. Peregriana dolgini (Russia, Republic of Buryatia, Kironskiy Spring; RMBH). M. P. peregra (France, from Draparnaud's collection; NHMW). Scale bars: 2 mm (D-F, J, L, M), 5 mm (A-C, H, I, K). G - scale bar absent from the original publication.

Figure 8. Copulatory apparatuses of the species in the genera Ampullaceana, Peregriana, Kamtschaticana, Tibetoradix, Racesina, Orientogalba and Bullastra. A. Ampullaceana ampla (11.07.2017, Ukraine, Transcarpathian Region, Irshava River). B. A. balthica (Germany, Mecklenburg-Vorpommern, lake Torgelower See). C. A. dipkunensis (15.09.2016, Ukraine, Transcarpathian Region, Tisa River). D. A. fontinalis (20.08.2017, Russia, Rostov Region, Severskiy Donets River). E. A. lagotis (29.06.2016, Tajikistan, a stream in the Panj River floodplain). F. Peregriana dolgini (13.07.2015, Russia, Tyumen' Region, a floodplain of the Tol'ka oxbow). G. Peregriana peregra (01.07.2006, Russia, Omsk Region, vicinity of Chernoluchye settlement). H. Kamtschaticana kamtschatica (12.04.2014, Russia, Kamchatka Peninsula, Valley of Geysers). I. Tibetoradix hookeri (09 - 10.2012, China, Tibet, a brook, 250 km N of Lhasa). J. T. kozlovi (after Aksyonova et al. 2018 a, modified). K. Racesina oxiana (04.07.2016, Tajikistan, a roadside ditch near Kurban-Shakhid village). L. R. siamensis (24.11.2016, Myanmar, a water reservoir on the Yetho River). M. Ampullaceana relicta relicta (2005, Ohrid Lake). N. Orientogalba ollula (08.07.2010, China, Shaanxi Province, a roadside ditch near Yandi village). O. Bullastra cumingiana (Philippines, Luzon Island, Lake Sampaloc). Scale bars: 1 mm. B - after Schniebs et al. (2011), modified.