Wiedemannia (Eucelidia) zetterstedti (Fallén), Fallen

Kustov, Semen & Zherebilo, Danil, 2015, New data on the genus Wiedemannia Zetterstedt (Diptera: Empididae) from the Caucasus with description of four new species, Zootaxa 4032 (4), pp. 351-369 : 366-367

Wiedemannia (Eucelidia) zetterstedti (Fallén)

( Fig. 17 )

Empis zetterstedti Fallén, 1826: 7 .

Material examined. RUSSIA: Krasnodarskiy Territory, env. Oktyabrskiy (2), 29.v.2013, S.Yu.Kustov, V.V. Gladun (2 ♂, 8 ♀); env. Betta (1), 12.vi.2013, V.V. Gladun (3 ♂, 1 ♀); Nature Reserve “Kamyshanova Polyana” (5), 24.vi.2013, S. Kustov (12 ♂, 16 ♀). GEORGIA: Mingrelia, env. Doberazeni (28), 2.v.2014, D. Zherebilo (25 ♂, 20 ♀); Mingrelia, ridge Ofitsari (30), 4.v.2014, D. Zherebilo (7 ♂, 8 ♀); same data, 6.v.2014, D. Zherebilo (31 ♂, 18 ♀); env. Chinkadziebi (25), 6.iv.2015, A.V. Zherebilo (2 ♂); env. Zedachukhuneti (27), 7.iv.2015, A.V. Zherebilo (1 ♂); env. Chaisubani (26), 8.iv.2015, A.V. Zherebilo (3 ♂, 1 ♀); env. Zedakinchha (34), 9.iv.2015, A.V. Zherebilo (1 ♂, 1 ♀); env. Opitara (35), 10.iv.2015, A.V. Zherebilo (3 ♂, 2 ♀); env. Chkumi (36), 11.iv.2015, A.V. Zherebilo (1 ♂); env. Namohvani (37), 15.iv.2015, A.V. Zherebilo (2 ♂, 1 ♀); env. Mukhuri (42), 17.iv.2015, A.V. Zherebilo (1 ♀). ABKHAZIA: River Pshitsa (9), 11.vii.2013, D. Zherebilo (3 ♂, 2 ♀); env. Sukhum (18), 27.vi.2013, D. Zherebilo (12 ♂).

Diagnosis. Wiedemannia (Eucelidia) zetterstedti differs by the completely olive-brown scutum, minute acrostichals extending to second pair of dorsocentrals, 5 pairs of dorsocentrals without intermediate setae interspersed among primary setae, fore femur with 2–3 strong bristles at the tip, fore coxae with 1–3 erect projecting setae, longer than surrounding setae and longer than width of coxa; clasping cercus bilobed, mittenshaped.

Distribution. PALAEARCTIC: Europe: Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyclades Is., Cyprus, Czech Republic, European Turkey, Finland, Germany, Greek mainland, Hungary, Italian mainland, Lithuania, Montenegro, North Aegean Is., Poland, Slovakia, Slovenia, Sweden, Switzerland, The Netherlands; Caucasus: Russia (Krasnodarsky Territory), Georgia, Abkhazia; Asia: Turkey (Bolu: Yedigöller National Park).

Remarks. This species was noted by Joost (1981) from the Sochi River ( Russia, Krasnodarskiy Territory), but in the Catalogue of Palaearctic Diptera it was mistakenly indicated from the Georgian territory. Therefore W. (E.) zetterstedti is noted from the territories of Georgia and Abkhazia for the first time. This common species is known from mountain rivers of the Caucasus from elevations between 288–2100 m a.s.l. and is active from April to July.

Figures

FIGURES 12 – 17. Male terminalia of Wiedemannia, lateral view. 12, W. pseguashae sp. nov.; 13, W. pseudovaillanti Joost; 14, W. shamshevi Kustov & Zherebilo; 15, W. sinclairi Kustov & Zherebilo; 16, W. vaillanti Joost; 17, W. zetterstedti (Fallén). Scale bar = 0.1 mm.