Gyrinus (Gyrinus) distinctus (Aubé, 1838), Aube, 1838

Van Vondel, Bernhard J., Ostovan, Hadi & Ghahari, Hassan, 2017, An annotated checklist of Iranian Myxophaga (Hydroscaphidae, Sphaeriusidae) and Adephaga (Gyrinidae, Haliplidae, Noteridae, Rhysodidae) (Insecta: Coleoptera), Zootaxa 4216 (3), pp. 225-246 : 231

Gyrinus (Gyrinus) distinctus (Aubé, 1838)

Distribution in Iran. Alborz ( Hematyian et al. 2010), Fars ( Hosseinie 1978), Guilan ( Guéorguiev 1965c; Darilmaz et al. 2013), Khuzestan ( Ghodrati et al. 2014), Lorestan ( Farzam Motlagh et al. 2012), Markazi ( Vafaei 2005; Vafaei et al. 2004), Mazandaran ( Ochs 1953; Vafaei et al. 2009), Sistan & Baluchistan ( Ochs 1957), Tehran ( Vafaei et al. 2009), Iran (no locality cited) ( Hafezieh 1997).

General distribution. Afghanistan, Austria, Azerbaijan, Belgium, Bosnia Herzegovina, Bulgaria, Byelorussia, Croatia, China (Nei Mongol, Xinjiang, Xizang) , Cyprus, Czech Republic, Denmark, Egypt, Finland, France, Great Britain, Germany, Greece, Hungary, India (Kashmir), Iraq, Israel, Italy, Kazakhstan, Kyrgyzstan, Lebanon, Lybia, Macedonia, Mongolia, Netherlands, Norway, Poland, Portugal, Russia (Central, Southern and Northern European Territory) , Slovakia, Spain, Sweden, Switzerland, Syria, “Transcaucasia”, Turkey, Uzbekistan, former Yugoslavia ( Mazzoldi 2003), Iran ( Guéorguiev 1981; Mazzoldi 2003; Darilmaz & Kiyak 2006; Kiyak et al. 2006).

Comments. This species has a dark ventral side. Specimens with a light ventral side were described by Régimbart, 1883 as G. fairmairi . Generaly last “species” is considered as an aberration of G. distinctus . Ochs (1953), however, never found intermediate forms, at least leaving the discussion open if fairmairi is just an aberration of distinctus . Therefor records of G. fairmairi or G. distinctus faimairi are treated separately below. Bodemeyer (1927) collected Gyrinus natator Linné, 1758 in Guilan, in a pool in the Elbruz Mountains, but it most likely concerns G. distinctus . Along coasts of dam lakes and slowly flowing streams; fresh and brackish water (Kiyat et al. 2006). On surface of clear, small, slow-moving streams ( Hosseinie 1978). Up to an altitude of 2100 m ( Ochs 1953).