Enallagma cyathigerum risi Schmidt, 1961(= Ehallagma risi)

A South Siberian and Central Asian subspecies of a complex Holarctic species Enallagma cyathigerum Charpentier, 1840. This subspecies ranges on plains from Saratov Province to Chita Province and throughout Central Asia. Its main diagnostic feature is the shape of the appendages superiores in males and lamela mesostigmalis in females. However, in more humid mountainous areas protrusing into the range of risi from the north, all the continuum of transitions to the typical shapes of these structures can be observed. The famous Siberian odonatologist B. F. Belyshev believed that southern West Siberia is inhabited by the nominotypical subspecies and so had a vague idea about what is risi, in fact he dealt almost exclusively with this taxon.

a copula

A small Lake Kudon on the right bank floodland of the Onon River 10 km upstream of Nizhnii Tsasuchei village, Onon District, Chita Province, SE Transbaikalia, Siberia, Russia. 15th July 1996. O. Kosterin.

O. Kosterin