Teslenko V.A., Khamenkova E.V.
В журнале Евразиатский энтомологический журнал
Год: 2023 Том: 22 Номер: 4 Страницы: 218-226
The Northeast is a special region of the Asia, including the Chukotka, Yakutiya, Kamchatka and Magadanskaya Oblast, which along with Alaska (USA), Yukon and the Northwest Territories (Canada) were part of ancient Beringia in the past. Currently, a total of 156 stonefly species from 49 genera and 9 families with 61 species in the Asia and 104 species in American part are known for Beringia. Among them there are eight common species, Capnia nearctica Banks, 1918 , Eucapnopsis brevicauda (Claassen, 1924) , Mesocapnia variabilis (Klapálek, 1920) , Nemoura arctica Esben-Petersen 1910 , Podmosta weberi (Ricker, 1952) , Arcynopteryx dichroa (McLachlan, 1872) , Diura bicaudata (Linnaeus, 1758) and Plumiperla diversa (Frison, 1935), and 22 common genera, demonstrating important role of Beringia in intercontinental faunistic exchanges and in independent development of present West Nearctic and East Palearctic stonefly faunas. There are nine species, known to be endemic, namely: five American, Mesocapnia bergi (Ricker, 1965) , Podmosta weberi, Alaskaperla ovibovis (Ricker, 1965), Isoperla katmaiensis Szczytko et Stewart, 1979 and I. decolorata (Walker, 1852), and four Asian species, Capnia tshukotica Zhiltzova et Levanidova, 1978, C. levanidovae Kawai, 1969, C. kolymensis Zhiltzova, 1979 and C. kurnakovi Zhiltzova, 1978). The species richness distribution in the Northeast Asia stonefly fauna corresponds to the general patterns and increases with the advancement from the Arctic deserts to the taiga zone and from the maritime monsoon climate to the continental one. The lowest species richness was noted in the tundra watercourses of the Chukotka, the greatest is in the streams and rivers of the taiga zone in the Magadanskaya Oblast. The richness of stonefly species in Kamchatka, located to the south, is poorer than the Magadanskaya Oblast due to paleogeographycal events and volcanic activity of the Kamchatka-Koryak volcanogenic belt. The composition and similarity of regional faunas is briefly considered. The species Paraleuctra cercia (Okamoto, 1922) and Plumiperla diversa (Frison, 1935) are reported for Chukotka for the first time.
