Lymnaea fragilis (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 : 363

Lymnaea fragilis (Linnaeus, 1758)

Distribution. In Ukraine L. fragilis is registered in all regions including the Transcarpathian (Anistratenko, Сhernogorenko, 1989; Stadnichenko, 2004; Stadnichenko, Gyrin, 2011 a). The species is recorded in five localities of the Transcarpathian Region: 10, 13, 17, 23 and 24 ( fig. 1 , table 1 ); the shell is illustrated by Anistratenko et al. (2018: fig. 3 , B).

Remarks. In the Transcarpathian this species occurs sporadically, inhabiting mainly natural and artificial ponds and associating with macrophytes at depths of 0.5–1.0 m. We recorded L. fragilis in the same altitude range as previous species (table 2). Although the taxonomic status of “ fragilis ” is not commonly accepted ( Vinarski, Kantor, 2016), we treat this form as a conchologically distinct “morphospecies ” ( Anistratenko et al., 2018).

Figures

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

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.