Stagnicola (Corvusiana) corvus (Gmelin in Linnaeus, 1791)

Distribution. In Ukraine the species inhabits basins of the Dnipro Bug River and Pripyat Polissia zone (Anistratenko, Сhernogorenko, 1989; Stadnichenko, 2004). In the Transcarpathian Region S. corvus has been recently recorded ror the first time at only a single locality (Anistratenko et al., 2018: shell depicted in fig. 3, C). Currently populations of this snail found in few additional localities: 6-8, 14, 28 and 32 (fig. 1, table 1).

Remarks. In the Transcarpathian Region this species inhabits usually warm (T = 16.0–25.7 °С), mainly small even periodically dried waterbodies, natural ponds and roadside canals within the altitude range between 100 and 165 m a. s. l., occacionally — up to 560 m a. s. l. (table 2). S. corvus prefer clay-silty bottom sediments though are associating with macrophytes (e. g. Iris pseudacorus L.) too. These pond snails are relatively rare in terms of number of populations we found in the region.