Hydromya dorsalis (Fabricius, 1775)

Khaghaninia, S., Kazerani, F. & Vala, Jean-Claude, 2018, New Data About Snail-Killing Flies (Diptera, Sciomyzidae) In Iran, Vestnik Zoologii 52 (1), pp. 21-30 : 24

Hydromya dorsalis (Fabricius, 1775)

Material examined: Iran: East Azerbaijan Province, Kandovan (moist grassland habitat) [37°45´N, 46°18´E, 2840 m], 20.05.2010, 1 ♀ ; Qaradagh (forest habitat) [38°51´N, 46°52´E, 1770 m], 14.06.2010, 3 ♂, 4 ♀ ; Horand (grassland habitat) [38°59´N, 47°22´E, 1370 m], 14.07.2010, 1 ♂; Qurigol (lagoon habitat) [37°54.975´N, 46°41,120´E, 1943 m], 9.07.2012, 1 ♂, 3 ♀ (Khaghaninia leg.) .

D i s t r i b u t i o n. Palaearctic: Europe: widely distributed from Scandinavia to Spain and the British Isles to Siberia. North Africa. Asia: Turkey, Afghanistan, Mongolia to Japan. Iran: Knutson, Berg (1963); Seddighi Sadr, Mohammadzade Namin (2016).

Biology. Larvae predate mainly the aquatic gastropods living on wet edge of various lentic freshwater habitats, predominantly Lymnaeidae species and also attack their egg masses with or without embryos or not ( Knutson, Berg, 1963; Gaponov, 2016). Vaillant (1956) found larvae in many madicole microhabitat in France. All the immature stages have been described by Knutson, Berg (1963). The puparia are formed outside of the snail host, on wet edge of the larval habitat ( Knutson, Berg, 1963). This species seems multivoltine ( Gaponov, 2016).