The freshwater molluscs of Serbia: Annotated checklist with remarks on distribution and protection status Author Marković, Vanja Author Gojšina, Vukašin Author Novaković, Boris Author Božanić, Milenka Author Stojanović, Katarina Author Karan-Žnidaršič, Tamara Author Živić, Ivana text Zootaxa 2021 2021-07-16 5003 1 1 64 journal article 218052 10.11646/zootaxa.5003.1.1 aceedc3f-3f24-490c-8046-7528c30aac10 1175-5326 5120059 8C98CC0B-18AF-418A-A794-AA3CA9CB7409 14. Bythinella istoka Glöer & Pešić, 2014 Findings in Serbia . Bythinella istoka : Glöer & Pešić (2014) . Morphology . Minute snails. Shell, up to 2.8 mm high, is whitish and ovoid, finely striated and with deep suture. Umbilicus is closed, aperture is oval. Mantle colour is black, penis has long flagellum. For more details see Glöer & Pešić (2014: 252, figs 11–13). Distribution and ecology . Endemic species known from only one locality. Type locality: Spring Vrelo, Istok Municipality (KiM). Other remarks . Not assessed on the IUCN Red List.