TheFauna of the Caddis-fly (Insecta, Trichoptera) of the Nakhchivan Autonomous Republic

The article presents data on the species diversity of larvae of the caddis-fly living in the bottom fauna of the rivers of Nakhchivan AR and their tributaries. As a result of long-term hydrobiological studies, 43 species of larvae of caddis-flys were found in the fauna of the Nakhchivan natural area of the Lesser Caucasus. The detachment is represented by 9 superfamilies, 16 families and 32 genus. According to the modern Zoological Nomenclature, the species composition of the detachment was specified, dominant, subdominant and minor (accidental) species were determined according to their ecological indicators. Dominant (10) and subdominant (8) species as rheophilic organisms are distributed in the benthic fauna of all flowing water bodies in all three altitudinal belts of the region. The peculiarities of changes in the species composition of larvae along the lower, middle and upper reaches of rivers are analyzed.