author(s)
Mahsa Ebrahimian Dehkordi and Mohammad Saeed Heydarnejad

abstract
Aquatic Coleoptera has been used as biological assessment of water quality with two largest families i.e. Dytiscidae and Hydrophilidae in terms of species richness and species diversity. As due to the limited studies on these organisms in Chaharmahl va Bakhtiari province, this study aimed to investigate bio systematics aquatic Coleoptera in central region of the province, i.e. Shahrekord. Sampling was done seasonally for one year at six nominated stations with the help of Sachuk. Collected samples were removed from debris by forceps and then transferred into vials containing 70% ethyl alcohol. The aquatic Coleoptera were identified at species level with the help of keys, books and related references and finally confirmed by foreign experts. A total of 8 species belonging to 6 genera (all from one family) were identified. Agabus bipustulatus and Scarodytes halensis were the most abundant insects. Considering that the identification of the aquatic Coleoptera fauna of the province is carried out for the first time, it is suggested that identification of aquatic Coleoptera to be continued at other freshwater habitats.