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 11. Bythinella austriaca ( Frauenfeld, 1857 ) Findings in Serbia . Bythinella austriaca : Filipović (1954) ; Tomić (1959) . Common name . Austrian spring snail. Morphology . Minute snails (ovoid cylindric shell up to 3 mm high). It has 3.5–4.5 regularly increasing whorls separated by deep suture almost perpendicular to the columella and blunt apex. More details in Glöer (2002: 164 , figs 198–201). Distribution and ecology . Central European species preferring cold clean waters with increased carbonate levels (in springs and adjacent brook systems) ( Sturm 2016 ). In Serbia , it has been reported from few springs (Vrujci, Čočića vrelo and Široke Luke Springs) from central and eastern Serbia . Other remarks . A wider distribution range of this species, accompanied with quite narrow ecological preferences, low dispersal ability and highly isolated habitats ( Benke et al . 2009 ; Beran 2010 ; Sturm 2016 ), brings possibility for intraspecific diversification. In that regard Glöer (2002) has distinguished four subspecies. On the IUCN Red List it has been assessed as LC ( Fehér et al . 2010 ).