Anisus septemgyratus (Rossmässler, 1835)

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 : 368-369

Anisus septemgyratus (Rossmässler, 1835) ( fig. 4 , 6–8)

Distribution. In the studied region the species found at a single locality (58 — table 1 ). In the rest part of Ukraine A. septemgyratus the populations are also not abundant although occur in all regions (Anistratenko, Сhernogorenko, 1989; Stadnichenko, 1990). Global distribution — Europe ( Glöer, Meier-Brook, 2008; Vinarski, Kantor, 2016).

Remarks. In the Transcarpathian Region mollusc is recorded in various types of waterbodies ( Stadnichenko, Gyrin, 2011 b); we found it only in streams in the highland zone (550 m a. s. l.) along with Terrestribythinella baidashnikovi , Galba truncatula and Ancylus fluviatilis ( table 1 , 2). The shell characteristics of A. septemgyratus from Transcarpathia match well the fully-grown specimen illustrated by Glöer and Meier- Brook (2008) who clearly argued distinctness of this species from others similar Anisus .

Figures

Fig. 4.Shells of Transcarpathian gastropod molluscs: 1 — Radix peregra (locality 55); 2 — R. lagotis (locality 48); 3–5 — Physa acuta (3, 4—from locality 6; 5 — locality 15); 6–8 — Anisus septemgyratus (locality 58); 9–11 — Anisus spirorbis (locality 16); 12–14 — Gyraulus albus (locality 16); 15–17 — Segmentina nitida (locality 14); 18–20 — S. montgazoniana (locality 7); 21–23 — Ancylus fluviatilis (locality 58).