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).