Segmentina montgazoniana Bourguignat

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 : 370

Segmentina montgazoniana Bourguignat in Servain, 1881 ( fig. 4 , 18–20)

D i s t r i b u t i o n. In the Transcarpathia S. montgazoniana is registered for the first time and is a formally new species for the regional fauna. Currently its populations are found in two localities: 6 and 7 ( fig. 1 , table 1 ). In Ukraine S. montgazoniana is known from the Polissya and Forest-Steppe zones (Anistratenko, Chernogorenko, 1989; Stadnichenko, 1990). Global distribution — Europe ( Vinarski, Kantor, 2016).

Remarks. In the Transcarpathia S. montgazoniana occur in shallow permanent waterbodies (rivers and their floodplains) on vegetation within the lowland area (ca. 100 m a. s. l.) ( table 1 , 2). European authors usually consider diversity of Segmentina as confined to one morphologically variable species, S. nitida ( Falkner et al., 2001; Glöer, 2002; Welter-Schultes, 2012). However, some anatomical and conchological differences allow distinguishing among this group several separate species ( Kruglov, Soldatenko, 1997) of which S. montgazoniana is recorded in the studied region.

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).

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