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 18. Bythinella serborientalis Radoman, 1978 Findings in Serbia . Bythinella serborientalis : Radoman (1978 , 1983 ); Jovanović (1991 , 1995). Morphology . Minute snails, up to 3 mm high. Shell is ovoid, with blunt apex. Aperture is pear-shaped, suture is deep, umbilicus mostly slit-like. For more details see Radoman (1983: 179 , pl. 12, fig. 211). Distribution and ecology . Serbian endemic species known from only one locality. Type locality Vrelo Spring ( Pirot Municipality, Balkan Mtn.). Other remarks . On the IUCN Red List of threatened species this taxon has been assessed as DD (Seddon 2011 b ). The species is protected on national level (Annex 1-strictly protected species; Official Gazette of RS 5/2010, 47/2011, 32/2016, 98/2016).