Abstract
Megarcys changbaishana sp. nov. from Changbai Mountain in Jilin Province, China, is described and compared with similar perlodid taxa and congeners. Isoperla altaica Šamal, 1939 and I. mongolica Zhiltzova, 1972 are reported for the first time from the Xinjiang Uygur Autonomous Region of China. Diagnostic features of these species are illustrated with color images.
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