Bythinella gregoi Glöer & Reuselaars, 2020, n. sp.

Overview & Synopsis

Bythinella gregoi n. sp. [fig. 2.2] Material examined: Holotype (RMNH.MOL.340496) and 2 paratypes (RMNH.MOL.340497) from type locality. Holotype: 2.5 mm high, 1.4 mm broad from type locality. Paratypes: 2 paratypes from type locality, 2 adult and 5 subadult ex. in coll. Robert Reuselaars (no. 839). Locus typicus: Spring SW of Anthousa, Greece, at 1.000 meters altitude, 39° 39' 31.97786'' N 21° 12' 27.76905'' E, 09.05.2013 Robert Reuselaars leg. Habitat: Slow running spring, the specimen were collected from old leaves. Etymology: Named after Jozef Grego who did so much for our knowledge of the hydrobiids from the Balkan. Description: The shell is slim ovate with 4-4.5 slightly convex whorls which are separated by a clear suture. The aperture is ovate, slightly angled at the top. The peristome is broadened at the columella. The umbilicus is slit-like. The aperture is 0.8 mm high and 0.7 mm broad. The ratio of shell height to shell width is 1.7. The shell is 2.4-2.7 mm high and 1.4-1.5 mm broad. Differentiating characters: See Bythinella kyriaki n. sp. Distribution: Only known from type locality.