Discomyza incurva ( Fallén, 1823 )

Dawah, Hassan A., Ahmad, Syed K., Abdullah, Mohammed A. & Zatwarnicki, Tadeusz, 2019, An overview of the Ephydridae (Diptera) of Saudi Arabia, Zootaxa 4711 (3), pp. 401-445 : 406

Discomyza incurva ( Fallén, 1823)

( Fig. 2–3 )

Psilopa incurva Fallén, 1823: 6 .

Discomyza incurva: Meigen 1830: 76 [generic combination]; Bergenstamm 1864: 713–716 [natural history, larva in dead snail, Helix pomatia L. ( Helicidae )]; Franz 1989: 264 [larvae reared from snails: Aegopis verticillus (Férussac) (Zonitidae) and Arianta arbustorum (L.) ( Helicidae )]; Zatwarnicki & Mathis 2007: 250–258 [revision].

Specimens examined. 1 ♂, Asir, Abha, Hay Al-Nusub ( Abha Farm Centre), 20. iv. 2013, Malaise trap, H.A. Dawah ( CERS) ; 2 ♀, same but, 1–25. v. 2013 ( CERS) .

Distribution. This is the first record from Saudi Arabia and Arabian Peninsula. This species was described from Sweden (Uplandia and Esperöd). Widespread in Europe, from southern Sweden to North Africa and east to Russia and the Caucasus, it is also recorded from Japan. It is also known from Nearctic Canada. In Britain, it is usually found on dunes where its larvae develop in dead snails.

Remarks. Deeming (1995) reported that in UK he reared it from the grove snail or brown-lipped snail Cepaea nermoalis L. ( Helicidae ).

Figures

FIGURES 2–3. Habitus, lateral view. Discomyza incurva (Fallén, 1823). 2. Male. 3. Female. (Images: James Turner, NMWC).