Viviparus sphaeridius (Bourguignat, 1880)

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 : 358

Viviparus sphaeridius (Bourguignat, 1880) ( fig. 3, 3 )

D i s t r i b u t i o n. The general distribution of V. sphaeridius includes lakes of south part of Alps, Danube, Dniester and Dnipro rivers basins ( Anistratenko, Anistratenko, 2001). In Ukraine it occurs in the Dniester and Dnipro basins as well as in the mouth of Danube. In the Transcarpathian Region the species is recently reported for the first time ( Anistratenko et al., 2018); currently it recorded in two localities: 8 and 12 ( fig. 1 , table 1 ).

Remarks. In the Transcarpathia V. sphaeridius occurs sporadically at same biotopes where V. viviparus live. The shell characteristics of V. sphaeridius from Transcarpathia match well the original description of Vivipara sphaeridia Bourguignat, 1880 , syntypes as well as topotypes of this species collected in the Danube near Marten, Bulgaria ( Glöer, Georgiev, 2014).

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