Enallagma cyathigerum risi Schmidt, 1961(= Ehallagma risi)
A South Siberian and Central Asian subspecies of a complex Transpalearctic 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 teneral male
Russia, Central Siberia, Tyva Republic (Tuva), Tanda Kozhuun, the western shallow bay of the brackish Lake Khadyn, 2nd July 2017.
O. Kosterin
Южносибирско-центральноазиатский подвид транспалеарктического вида.
свежевыплодившийся самец
Россия, Средняя Сибирь, Республика Тыва (Тува), Тандинский Кожуун, западный мелководный залив солоноватого озера Хадын, 2 июля 2017 г.
О. Костерин