One problem less: the true identity of Nemoura sahlbergi problematica Zwick, 1973 (Plecoptera: Nemouridae)

By finding the epiproct slide preparation of holotype Nemoura sahlbergi problematica Zwick, 1973, which was considered to be lost, identity taxon is resolved. It raised species rank, 1973 stat. nov., and jilinensis Zhu & Yang, 2003 as its junior synonym. The widespread in Korean Peninsula, known also from NE China (Jilin Province) Russian Far East (Khabarovsk Primorsky Krai). New records are listed, distribution detailed depicted on map. Morton, 1896 but not Korea.