Abstract Nemoura kozari sp. n. is described on the basis of morphology male adults collected in Eastern Carpathians. The new species classified as a member marginata group. It was found medium elevations Krasna Mts, Ukraine, and Rodna Romania, inhabiting slowly flowing, small brooks. New diagnosis group enumeration its members are provided.

The present study focuses on the sensitivity among freshwater invertebrate species to acidic stress. Three common macroinvertebrate species in the Vosges Mountains (North-Eastern France), Gammarus fossarum (Amphipoda), Hydropsyche pellucidula (Trichoptera) and Dinocras cephalotes (Plecoptera) were exposed for 24, 72 and 120 h to natural acidified water (pH=4.73+/-0.08, [Ca2+]=39.1+/-0.6 micromo...