Radix (Peregriana) balthica (Linnaeus, 1758)

Anistratenko, V. V., Furyk, Yu. I., Anistratenko, O. Yu. & Degtyarenko, E. V., 2019, A Review Of Species Diversity, Distribution And Ecology Of Freshwater Gastropod Molluscs Inhabiting The Ukrainian Transcarpathian, Vestnik Zoologii 53 (5), pp. 349-374 : 366

Radix (Peregriana) balthica (Linnaeus, 1758)

D i s t r i b u t i o n. The species is recently found in the Transcarpathian Region for the first time ( Anistratenko et al., 2018: shell illustrated in fig. 3 , M). Currently five localities of R. balthica are revealed in the region: 1, 2, 15, 21 and 26 ( fig. 1 , table 1 , 2); one of which (26) is located in a mountainous area, 700 m a. s. l. representing one of the highest place of occurrence of lymnaeid snail here. In Ukraine the species is registered in various regions, excluding Steppe zone and Carpathians (Anistratenko, Сhernogorenko, 1989; Stadnichenko, 2004). General distribution — Palaearctic ( Vinarski, Kantor, 2016).

Remarks. R. balthica is one of the widespread and common species of the subgenus Peregriana in the fauna of Europe. Its populations in the Transcarpathia are characterized by high density. According to our observations, R. balthica occurs here only in rivers and prefers cold and fast-running water conditions. Relevant remarks on taxonomic identity of R. balthica from the Transcarpathia are given in Anistratenko et al. (2018).

Figures

Fig. 3. Shells of Transcarpathian gastropod molluscs: 1 — Viviparus viviparus (locality 12); 2 — Contectiana contecta (locality 15); 3 — Viviparus sphaeridius (locality 12); 4 — Bithynia tentaculata (locality 15); 5 — Valvata (Cincinna) ambigua (locality 15); 6 — Bithynia troschelii (locality 13); 7 — Valvata (Cincinna) piscinalis (locality 22); 8 — Lithoglyphus naticoides (locality 9); 9–11 — Planorbis planorbis (locality 15); 12, 13 — Planorbarius corneus (locality 15). Scale bars are given for 1–3, 4–8, and 9–13 correspondingly.

Fig. 1. Map showing the localities of samples studied. Details for each sampling point are given in table 1.