35. Valvata cristata O. F. Müller, 1774

Findings in Serbia.

Valvata cristata: Hesse (1929); Karaman (2001); Paunović et al. (2007a); Martinović-Vitanović et al. (2013).

Common name. Crested valve snail, flat valve snail.

Morphology. Minute snails up to 3.5 mm long/wide. Shell is flat, transparent, and consists of three whorls. Aperture is circular in shape, umbilicus is wide. For more details see Welter-Schultes (2012: 42, figure at the bottom of the page).

Distribution and ecology. European species, known from Turkey and Iran as well (Glöer 2019). Inhabits a wide variety of habitats, including permanent and temporary flowing and standing waters. Prefers a muddy substrate, submerged vegetation and higher carbonate levels. In Serbia, it was recorded only from the Danube, with most localities in the Iron-Gate area.

Other remarks. Despite its wide distribution and its eutrophication tolerance, it is considered vulnerable, or even endangered, due to pronounced habitat degradation in some regions, (Welter-Schultes 2012). On the IUCN Red List it has been assessed as LC (Vavrova 2011 e).