Diamesa (Diamesa) vaillanti Serra-Tosio 1972

Diamesa (Diamesa) vaillanti Serra-Tosio, 1972 Material examined. 1 pupal exuvium, Rypenka river (S 7), 7 May 2018. Distribution. Palaearctic: Germany, Switzerland, France, Italy, Austria, Slovakia, Poland, Russia, Spain, Turkey, Morocco (Ashe and O’Connor 2009), and Azerbaijan (Kownacki 1985). Habitat. Rheophilic species inhabiting high-altitude springs, streams (including glacier-fed), and rivers with rocky bottoms, but also alpine lakes (Bitušík 2004; Lencioni et al. 2011; Rossaro and Lencioni 2015). The species is cold-stenothermal (e. g., Rossaro 1991) although the findings from streams in the High Atlas indicate that it can tolerate relatively high temperatures of up to 22 ° C (Azzouzi et al. 1992). Remarks. The occurrence of the species is limited to waters at high altitudes. Since our record is from 448 m a. s. l., our finding is exceptional.