Radix (Radix) ampla (Hartmann, 1821)

Anistratenko, Vitaliy V., Vinarski, Maxim V., Anistratenko, Olga Yu., Furyk, Yurii I. & Degtyarenko, Elena V., 2018, New data on pond snails (Mollusca: Gastropoda: Lymnaeidae) inhabiting the Ukrainian Transcarpathian: diversity, distribution and ecology, Ecologica Montenegrina 18, pp. 1-14 : 11

Radix (Radix) ampla (Hartmann, 1821)

( Fig. 3 , O; 4 , B)

Distribution: The species is new for the Transcarpathian region; found in 3 localities (3, 12, 15 – Table 1). In Ukraine the species is registered (under the name L. monnardi (Hartmann, 1844)) from the Forest-Steppe and Polissya zones ( Stadnichenko 2004). General distribution – Europe and Siberia.

Remarks: In the Transcarpathian this species is found only in rivers among vegetation.

Taxonomic remarks: Though some authors ( Hubendick 1951; Jackiewicz 1998) rejected the validity of R. ampla , the recent works based on either morphology ( Glöer 2002; Stadnichenko 2004; Kruglov 2005) or molecular taxonomy ( Schniebs et al. 2011) have shown it is a biological species. According to Kruglov (2005), R. ampla (= Lymnaea patula sensu Kruglov ) has a rather long penis sheath, and the preaeputium: penis sheath ratio in this species is around 0.75. The proportions of the copulatory apparatus of a single specimen of R. ampla dissected during this study correspond well to Kruglov‟s description (see Fig. 4 , B).

Figures

Figure 3. Shells of pond snails found. A – Lymnaea stagnalis from locality 16; B – L. fragilis, locality 7; C – Stagnicola corvus, locality 8; D – Galba truncatula, locality 21; E – G. subangulata, locality 16; F – G. oblonga, locality 4; G, H – Ladislavella terebra, loc. 17; I – Radix auricularia, locality 3; J, K – R. parapsilia, locality 10; L – R. ampullаcea, locality 3; M – R. balthica, locality 2; N – R. intermedia, locality 4; O – R. ampla, locality 15; P – R. tumida, locality 15. Scale bar = 10 mm for A–C and 5 mm for D–P.

Figure 4. The copulatory organs of some lymnaeid snails from the Transcarpathian region. A – Ladislavella terebra; B – Radix ampla; C – R. tumida. Scale bars = 1 mm for A and 2 mm for B, C. Abbreviations: pp – praeputium, ps – penis sheath.