Bythinella pesici, Glöer & Reuselaars, 2020

Glöer, Peter & Reuselaars, Robert, 2020, The Bythinella spp. of Greece (Gastropoda: Hydrobioidea: Bythinelliidae), Ecologica Montenegrina 29 (2020), pp. 20-33 : 26

Bythinella pesici n. sp. [fig. 2.3]

Material examined: Holotype ( RMNH.MOL.340499) and 3 paratypes ( RMNH.MOL.340499) from type locality.

Holotype: 2.8 mm high, 1.7 mm broad from type locality.

Paratypes: 3 paratypes from type locality, 1 adult and 6 subadult ex. in coll. Robert Reuselaars (no. 1267).

Locus typicus: Spring north of Klima, Aetolia, Greece (south of lake Trichonida) at 660 meters altitude ( Figure 14 ), 17.06.2019 Robert Reuselaars leg.

Habitat: In the concrete canal and on old leaves of the artificial basin. This species occupies an area of less than 0, 5 m 2.

Etymology: Named after Vladimir Pešić who did so much for our knowledge of the freshwater molluscs from the Balkans.

Description: The shell is ovate with 4-4.5 convex whorls which are separated by a deep suture. The aperture is ovate. The peristome is somewhat broadened at the columella. The umbilicus is closed. The body whorl takes 0.75 of shell height. The aperture is 0.9 mm high and 0.8 mm broad. The ratio of shell height to shell width is 1.6. The shell is 2.3-2.8 mm high and 1.5-1.7 mm broad.

Differentiating characters: The shell is smaller than B. klimaensis n. sp. and B. righaensis n. sp., but larger than B. radomani n. sp. In B. klimaensis n. sp. and in B. radomani n. sp. the aperture is angled at the top. In B. righaensis n. sp. the whorls of the spire are more convex than in B. pesici n. sp.

Distribution: Only known from type locality.

Figures

Figures 10-14: Sampling sites. 10. Aghios Petros (type locality of Bythinella petrosensis n. sp.), 11. Monia Konstadinou (type locality of Bythinella konstandinensis n. sp.), 12. Olymbos mountain (type locality of Bythinella olymbosensis n. sp.), 13. Kokinochori (type locality of Bythinella radomani n. sp.), 14. N. of Klima (type locality of Bythinella pesici n. sp.), 15: spring above Eftalophos (type locality of Daphniola eptalofos).