Some new Bythinella spp. from southern Greece (Gastropoda: Bythinellidae) Author Glöer, Peter Schulstrasse 3, D- 25491 Hetlingen, Germany; e-mail: gloeer @ malaco. de Author Hirschfelder, Hans-Jürgen Schützenstr. 2, D- 93309 Kelheim, Germany; e-mail: hja @ hirschfelder-kelheim. de text Ecologica Montenegrina 2020 2020-04-14 30 60 67 http://dx.doi.org/10.37828/em.2020.30.5 journal article 10.37828/em.2020.30.5 2336-9744 13231395 urn:lsid:zoobank.org:pub:2062AA44-F3E4-4813-90FB-BB88271CC666 Bythinella eleousae n. sp. [ fig. 2.1 ] Type locality: Greece , Phocis , Parnassus Mountains , Polidrosos , Kifisou Spring at the ruin of the Byzantine church Agia Eleousa , 1.5 km SW of Polidrosos , N 38°37'45.1" / E 22°31'12.4" , 311 m a.s.l. , 07.05.2017 , leg. Hans-Jürgen & Andrea Hirschfelder. Type Material: Holotype ( ZMH 140676 ): Shell height 2.95 mm , shell width 1.9 mm . Paratypes from type locality: ZMH (140677/1), coll. Hirschfelder ( 7 adult , 2 subadult ) . Etymology: The new species is named after the Byzantine church Agia Eleousa. The type locality is situated just below that ruin. Description: Shell: The shell is cylindrical with a flat apex and relatively broad. The 4.5-5 whorls are slightly convex with a clear suture. The body whorl takes about 0.75 of shell height. The aperture is ovate, with a sharp peristome. The umbilicus is slit-like. The shell is 2.8-3.1 mm high and 1.8-1.9 mm broad. Differentiating characters : The new species exhibits the smallest length to width ratio (1.50-1.55) of all Greek Bythinella species. The most similar form is B. kwanti Glöer & Reuselaars, 2020 , from the area of Kalavrita with a ratio of 1.6. In all other species that ratio is (much) higher. Distribution: Only known from type locality on the northern slope of the Parnassus Mountains.