Bithynia tentaculata (Linnaeus, 1758)

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 : 359

Bithynia tentaculata (Linnaeus, 1758) ( fig. 3 , 4 )

D i s t r i b u t i o n. Global range of B. tentaculata covers the Europe and Western Siberia. In Ukraine the species is the most common bithyniid species in all regions except the mountainous areas of Carpathians and Crimea (e. g. Anistratenko, Stadnichenko, 1995). In the Transcarpathia its populations are rarely occurred ( Zdun, 1960; Anistratenko et al., 2017, 2018) in the lowland area. Altogether we only recorded this species in 3 localities: 8, 9 and 15 ( fig. 1 , table 1 ).

Remarks. In the Transcarpathian region B. tentaculata inhabits shallow, slowly current and mostly warm (up to 25.6 °С) waters of rivers and their floodplains; it sometimes occurs in small artificial ponds (locality 8). Molluscs are usually associating with macrophytes at depths of 0.1–1.5 m at various bottom sediments (silty, sandy, stony, etc.).

Figures

Fig. 3. Shells of Transcarpathian gastropod molluscs: 1 — Viviparus viviparus (locality 12); 2 — Contectiana contecta (locality 15); 3 — Viviparus sphaeridius (locality 12); 4 — Bithynia tentaculata (locality 15); 5 — Valvata (Cincinna) ambigua (locality 15); 6 — Bithynia troschelii (locality 13); 7 — Valvata (Cincinna) piscinalis (locality 22); 8 — Lithoglyphus naticoides (locality 9); 9–11 — Planorbis planorbis (locality 15); 12, 13 — Planorbarius corneus (locality 15). Scale bars are given for 1–3, 4–8, and 9–13 correspondingly.

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.