Coenagrion ecornutum (Selys, 1872)
An Asian species ranging from Ural to Japan, locally common in S Siberia.
A copula
A sedge bank of a mortlake of the right bank floodland of the Onon River 10 km upstream of Nizhnii Tsasuchei village, Onon District, Chita Province, SE Transbaikalia, E Siberia, Russia. 6th July 1996.
O. Kosterin