Distribution of Steninae in Iran. 1. Geographical subdivision of Iran modified after Petrov (1955) and 2–6 distribution data of Steninae: 2. Dianous and the Stenus alpicola species group: ● D. coerulescens korgei, ○ S. proprius; 3. S. ater species group: ➕ S. affaber, ● S. ater, △ S. hypoproditor, ■S. intricatus zoufali, ●S. mongolicus, ○ S. nodipes, ▲ S. skoraszewskyi; 4. S. brunnipes species group: ● S. b. brunnipes; 5. S. canaliculatus species group: ● S. canaliculatus; 6. S. cautus species group: ○ S. cautus. Abbreviations: C - Caspian wet forest region, D - deserts and salt marshes, G - Golestan region, Gh - Ghohrud Mountains, Hm - mountains of Hormozgan, Khu - Khuzestan Plain, NB - North Baluchestan Mountains, NKh - North Khorasan Mountains, NNW - northern part of North Zagros Mountains, NZ - North Zagros Mountains, SB - South Baluchestan Mountains, SC - coast of Persian Gulf and Oman Sea, SE - southern slopes of Elburz Mountains, SKh - southern Khorasan Mountains, SZ - southern Zagros Mountains in Fars, Z - Zagros Mountains.