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 kithiraensis n. sp. [ fig. 2.8 ] Type locality: Greece , Attica , Kithira Island , Mylopotamos , “Valley of the Mills”, tiny spring beside the big waterfall, N 36°14'38.8" / E 22°56'42.0" , 275 m a.s.l. , 19.10.2019 , leg. Hans-Jürgen Hirschfelder. Type Material: Holotype ( ZMH 140690 ): Shell height 2.4 mm , shell width 1.4 mm . Paratypes from type locality: ZMH (140691/1), coll. Hirschfelder ( 2 adult , 6 subadult ) . Etymology: The new species is named after Kithira Island. Description: Shell: The shell is cylindrical with a small and broad flat apex. The 4.5-5 whorls are convex with a deep suture. The body whorl takes about 0.6 of shell height. The aperture is ovate, with a sharp peristome. The umbilicus is closed. The shell is 2.2-2.5 mm high and 1.3-1.4 mm broad. Differentiating characters: Both Kithiran species are smaller than the species of southern Peloponnese except B. beckmanni . The shell of B. amira n. sp. is in average higher, more conical with a smaller apex than B. kithiraensis n. sp. and the length to width ratio is about 1,9 whereas the latter shows a ratio of about 1.75. Associated species : Pseudamnicola magdalenae , Gyraulus sp. Distribution : Only known from type locality in western Kithira Island. Remarks: This species was not found in the big spring in the center of Mylopotamos.