Bythinella petrosensis, Glöer & Reuselaars, 2020

Glöer, Peter & Reuselaars, Robert, 2020, The Bythinella spp. of Greece (Gastropoda: Hydrobioidea: Bythinelliidae), Ecologica Montenegrina 29 (2020), pp. 20-33 : 28

Bythinella petrosensis n. sp. [fig. 2.8]

Material examined: Holotype ( RMNH.MOL.340508) and 1 paratype ( RMNH.MOL.340509) from type locality.

Holotype: 2.9 mm high, 1.8 mm broad from type locality.

Paratypes: 1 paratype from type locality, 2.0 mm high and 1.3 mm broad, 4 (dry) in coll. Robert Reuselaars (no. 682).

Locus typicus: Spring 5-6 km Se of Aghios Petros, Parnon mountains, Peleponnesos, Greece at 1.105 meters altitude ( Figure 10 ), 37° 17' 36.115787'' N 22° 35' 30.35337'' E, 24.09.2010 Robert Reuselaars leg.

Habitat: This species occupies an area of only less than 0, 15 m 2 in an artificial basin of a slow running spring

Etymology: Named after Aghios Petros town.

Description: The shell is elongated ovate with 3-4.5 convex whorls which are separated by a deep suture. The aperture is ovate. The peristome is thickened at the columella. The umbilicus is closed. The body whorl takes 0.8 of shell height. The aperture is 0.8 mm high and 0.7 mm broad. The ratio of shell height to shell width is 1.6. The shell is 2.0- 2.2 mm high and 1.3 mm broad.

Differentiating characters: This species is much smaller than B. liandinaensis n.sp. and much smaller than B. atypicos as well.

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).