Orientogalba ollula (Gould, 1859)

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

27. Orientogalba ollula (Gould, 1859) Figs 8M ; 9N ; Table 3

Limnaea ollula Gould 1859: 40.

Limnaeus pervius von Martens 1867: 221.

Lymnaea viridis - Hubendick 1951: 162, fig. 351 (partim).

Galba pervia - Zhadin 1952: 176, fig. 77.

Lymnaea (Orientogalba) ollula - Kruglov and Starobogatov 1993b: 175, fig. 10C.

Orientogalba ollula - Vinarski and Kantor 2016: 357; Aksenova et al. 2018a: 4.

TL.

China, streams and marshes of Hong Kong Island.

Lectotype.

National Museum of Natural History, Smithsonian Institution, Washington, USA ( Johnson 1964).

Though the type material of L. ollula Gould is extant, we were unable to study it. Instead, we examined a small series of shells of this species collected in Yokohama, Japan ( NHMUK). Shell is ovoid, with shortened spire and strongly-inflated body whorls. Generally, it much resembles the shell of O. viridis and we could not delimit these two taxa by means of conchology. Like most species of radicines discussed above, O. ollula is characterised by the disproportion in sizes between the penis sheath and praeputium, the latter being much larger and broader (see Fig. 8M ).

Taxonomic remark.

This species, described from eastern China, has usually been considered as a junior synonym of O. viridis ( Hubendick 1951; Brandt 1974); however, Kruglov and Starobogatov (1993b) regarded it as a separate taxon. The results of our study allowed us to accept their opinion and use the name O. ollula to label a species of Orientogalba , widely distributed in China (found also in South Korea and Nepal). Perhaps, all recordings of " Lymnaea viridis " from Siberia, Russian Far East and Mongolia ( Kruglov and Starobogatov 1985a, 1993b; Vinarski and Kantor 2016; Vinarski et al. 2017) should also be referred to as O. ollula .

Figures

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.

Figure 9. Shells of species of the genera Ampullaceana, Kamtschaticana, Myxas, Tibetoradix, Racesina, Orientogalba and Bullastra. A. Ampullaceana relicta relicta (05.1975, Macedonia, a spring near St. Naum monastery, Ohrid Lake region; NHMW). B. A. r. pinteri, a paratype (05.06.1973, Macedonia, Prespa Lake near Perovo; MHMW). C, D. Kamtschaticana kamtschatica (Russia, Kamchatka Peninsula, Valley of Geysers; RMBH). E. Myxas glutinosa (14.09.1963, Kazakhstan, floodplain of the Tobol River near Kustanay City; ZISP). F, G. Tibetoradix hookeri, two syntypes (NHMUK). H. T. kozlovi, the holotype (ZISP). I. Racesina luteola (India, Bengal, Paksay, Pabna; NHMUK). J. R. oxiana (04.07.2016, Tajikistan, a roadside ditch near Kurban-Shakhid village; LMBI). K. R. siamensis (" Thailand "; ZMB). L. Orientogalba viridis, a syntype (Guam Island; NMNH). M. O. ollula (1883, Japan, Yokohama; NHMUK). N. Limnaea bowelli, a type (after Preston 1909). O. Orientogalba cf. bowelli (30.06.1924, China, Tibet, Lingka, 14,500 feet a. s. l.; NHMUK). P. Bullastra cumingiana (Philippine, Cebu Island; NHMUK). Scale bars: 2 mm (C, D, F-H, L, M, O), 5 mm (A, B, E, J-K, N, P).