A case of biodiversity overestimation in the Balkan Belgrandiella A. J. Wagner, 1927 (Caenogastropoda: Hydrobiidae): molecular divergence not paralleled by high morphological variation Author Osikowski, Artur Author Hofman, Sebastian Author Rysiewska, Aleksandra Author Sket, Boris Author Prevorčnik, Simona Author Falniowski, Andrzej text Journal of Natural History 2018 2018-02-06 52 5 - 6 323 344 http://dx.doi.org/10.1080/00222933.2018.1424959 journal article 10.1080/00222933.2018.1424959 1464-5262 5178219 Belgrandiella cf. koprivnensis Radoman, 1975 ( Figure 3s, t ) Diagnosis Shell ovate, broad, spire high and broad, apex blunt, whorls rather flat, aperture ovoid, narrow, with an angle at its upper right side, peristome continuous, parietal lip well developed, umbilicus slit-like, outer lip simple. Type material Locus typicus: the Krčana spring, about 2 km from the road Cazin-Bužim, near the Donja Koprivna village , Bosnia and Herzegovina . Distribution Endemic to Bosnia and Herzegovina . Despite reservations concerning species determinations, four nominal species ( B. krupensis , B. robusta , B. umbilicata and B. zermanica ) and one genus ( Boleana ) must be synonymised with Belgrandiella kusceri , and there are no more than four valid biological species in the studied Belgrandiella . So, as noted already by Falniowski and Beran (2015) , the level of endemism is markedly overestimated in Belgrandiella snails.