Orthocladius (Orthocladius) rivinus Potthast 1914

Orthocladius (Orthocladius) rivinus Potthast, 1914 Material examined. 1 pupal exuvium, left-hand tributary of Zhdenivka River (S 3), 7 May 2018. Distribution. Palaearctic. Norway, Great Britain, Ireland, Austria, Slovakia, Hungary, Poland, Belarus, Germany, Switzerland, France, Italy, Spain, Canary Islands, and Portugal (Cobo et al. 2002; Ashe and O’Connor 2012; Moller Pillot 2013; Móra et al. 2013; Sołtys-Lelek et al. 2014). Habitat. Rheophilic species inhabiting springs and flowing waters from small streams to large rivers, although it has been reported also from lakes (Langton and Visser 2003). Rossaro et al. (2003) underline its preference for cold waters, but some findings question this (e. g., Langton and Orendt 1996; Móra et al. 2013). Remarks. The species is known from a few European countries and is generally considered rare. Like the ambiguous data on its ecology, this may also be the result of misidentification.