Gyrinus (Gyrinus) caspius Ménetries, 1832

Gyrinus elongatus Aubé, 1838 .

Distribution in Iran. East Azarbaijan (Atamehr 2002; Atamehr et al. 2004), Golestan (Ochs 1953), Guilan (Bodemeyer 1927; Guéorguiev 1965c; Kamali 2008), Mazandaran (Ochs 1953; Legros 1972).

General distribution. Algeria, Armenia, Azerbaijan, Belgium, Bosnia Herzegovina, Bulgaria, Byelorussia, China (Xinjiang), Croatia, Cyprus, Denmark, Estonia, France, Germany, Georgia, Greece, Iraq, Israel, Italy, Kazakhstan, Lebanon, Lithuania, Morocco, Netherlands, Norway, Poland, Portugal, Russia (Central and South European Territory), Slovenia, Spain, Sweden, Ukraine, Syria, Turkmenistan, Turkey, former Yugoslavia (Mazzoldi 2003), Iran (Guéorguiev 1981; Mazzoldi 2003; Shaverdo 2003; Darilmaz & Kiyak 2006; Kiyak et al. 2006).

Comments. Puddles and slowly flowing streams; fresh and brackish water (Kiyak et al. 2006). Bodemeyer (1927) reports this species from a brooklet in the Elbruz Mountains.