Ancylus fluviatilis O. F. Müller, 1774 (fig. 4, 21–23)

D i s t r i b u t i o n. In Ukraine A. fluviatilis is registered in all regions except Crimea (Anistratenko, Сhernogorenko, 1989; Stadnichenko, 1990). This river limpet was repeatedly recorded in the Transcarpathian Region (Zdun, 1960; Stadnichenko, Gyrin, 2011 b; Anistratenko et al., 2018) where it appears to be one of the most common and widespread pulmonate species — we found its populations in 7 localities: 12, 18, 19, 25, 28, 51 and 58 (table 1). Global distribution — Europe, Northern Africa and north-western Asia (Vinarski, Kantor, 2016).

Remarks. According to our observations in Transcarpathia, this species inhabits shallow (up to 0.2 m) zone of springs and rivers in both lowland and mountainous areas in the altitude range 110–570 m a. s. l. (table 2). Limpets prefer clean and oxygen-rich conditions with hard, mostly rocky substrates on the surface of which they are firmly adhere.