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 78. Dreissena polymorpha ( Pallas, 1771 ) Findings in Serbia . Dreissena polymorpha : Matoničkin et al. (1975) ; Arambašić (1994) ; JDS-ITR Report (2002) ; Paunović et al. (2005 , 2007 b , 2015); Đurković et al. (2006) ; Simić et al. (2009); Tomović et al. (2010 b , 2014); Zorić et al . (2010 , 2020 ); Kovačević et al. (2012) ; Marković et al. (2012) ; Raković et al. (2013) ; Martinović-Vitanović et al . (2007 , 2013); Lucić et al. (2015) ; Raković (2015) . Common name . Zebra mussel. Morphology . Medium-sized bivalve. Elongate rounded-triangular shell reaches dimensions of 20–50 mm , height 13–18 mm , and depth 17–20 mm . For more details see Welter-Schultes (2012: 16 , figure at the bottom of the page). Distribution and ecology . Ponto-Caspian native species, nowadays widespread across Europe, reaching North America ( Moorkens & Killeen 2009 ; Welter-Schultes 2012 ). It prefers hard substrate (attaching itself by byssus threads) of slow-flowing waters (rivers, canals, reservoirs, power station cooling systems, water treatment facilities, water pipelines). In Serbia , it is found mostly in large lowland rivers (Danube, Tisza, Sava, Velika Morava), and it has been recorded in the Drina River as well. Other remarks . Invasive species which has been ranked as the “worst alien” mollusc species in Europe and as 23 rd species in the “List of the worst alien species for Europe” ( Nentwig et al. 2018 ). It has 56 nominal species as synonyms ( Graf & Cummings 2021 ). On the IUCN Red List it has been assessed as LC ( Van Damme 2014 ).