The Bythinella spp. of Greece (Gastropoda: Hydrobioidea: Bythinelliidae) Author Glöer, Peter Schulstrasse 3, D- 25491 Hetlingen, Germany; e-mail: gloeer @ malaco. de Author Reuselaars, Robert Traverse 33, 9408 MG Assen, The Netherlands; e-mail: f 2 hreuselaa @ hetnet. nl text Ecologica Montenegrina 2020 2020-03-14 29 2020 20 33 http://dx.doi.org/10.37828/em.2020.29.3 journal article 10.37828/em.2020.29.3 2336-9744 12808255 urn:lsid:zoobank.org:pub:873D27C2-1693-4E93-8313-D00B72F82B82 Bythinella liandinaensis n. sp. [fig. 2.9] Material examined: Holotype ( RMNH .MOL.340510) and 3 paratypes ( RMNH .MOL.340511) from type locality. Holotype : 3.0 mm high, 1.8 mm broad from type locality. Paratypes : 3 paratypes from type locality, 6 adult and 8 subadult (dry) in coll. Robert Reuselaars (no. 683). Locus typicus: Spring between Liandina and Vasiliki, Peleponnesos , Greece , at 70 meters altitude ( Figure 8 ), 36° 54' 42.86614'' N 22° 26' 33.74825'' E , 19.09.2010 Robert Reuselaars leg. Habitat: On old leaves in a smal spring, this species occupies an area of about 1 m 2 . Etymology: Named after Liandina town. Description: The shell is elongated ovate with 4.5-5 slightly convex whorls which are separated by a deep suture. The aperture is ovate, slightly angled at the top. The peristome is sharp. The umbilicus is slit-like. The body whorl takes 0.67 of shell height. The aperture is 1.0 mm high and 0.8 mm broad. The ratio of shell height to shell width is 1.8. The shell is 2.4-3.0 mm high and 1.4-1.6 mm broad. Differentiating characters: See B. petrosensis n. sp. Distribution: Only known from type locality.