Gonarcticus arcticus ( Becker, 1907 )

Ozerov, A. L. & Krivosheina, M. G., 2015, A review of the genera Cleigastra Macquart, Gonarcticus Becker, Gonatherus Rondani, Hexamitocera Becker, Nanna Strobl, Orthacheta Becker and Spathephilus Becker (Diptera, Scathophagidae) of Russia, Zootaxa 4012 (2), pp. 201-258 : 212-215

Gonarcticus arcticus ( Becker, 1907)

Figs 34–37 , 39–43 .

arctica Becker, 1907: 412 ( Pselaphephila ). Type-locality: East Greenland.

Material examined. Altay: Ridge Kurayskiy, 2500–2700 m (50.33N 87.75E), 3.VII.2008, A. Barkalov (1 ♀, ZMUM); Chukotka: Vrangel I. (71.29N 179.63E), 13.VII.2008, O. Chruleva (1 ♂, ZMUM).

Additional material examined. CANADA: Cambrige Bay, N.W.T., 1 and 22.VII.1950, G.K. Sweatman (1 ♂, 2 ♀♀, ZMH; all determined by J.R. Vockeroth as G. arcticus ).

Diagnostic description. Body-length 5–6 mm. Head. Frontal vitta blackish in upper half and yellow in lower half. Antenna black. Palpus darkened apically. Katepisternum with 2 strong black setae, anterior katepisternal seta absent. Legs yellow, but all coxae blackish, fore femur posterodorsally and tarsi darkened. Mid femur with a row of posteroventral setae. Hind tibia with posteroventral apical seta. Vein R1 bare on apical third of dorsal surface. Abdomen black. Sternites 4 and 5 as in Figs 37, 36 . Epandrium, cerci and surstyli as in Figs 34, 35 . Ovipositor as in Figs 39–41 .

Distribution. Russia ( Fig. 43 ): Altay, Chukotka (first record for Russia and Palaearctic).—North America ( Vockeroth, 1965: 832).

Figures

FIGURES 30 – 38. Gonarcticus antennatus (Zetterstedt) (30 – 33, 38), Gonarcticus arcticus (Becker) (34 – 37): 30, 36 — male sternite 5; 31, 34 — epandrium, cerci and surstyli, lateral view; 32, 35 — same, dorsal view; 33, 37 — male sternite 4; 38 — distribution map.

FIGURES 39 – 44. Gonarcticus arcticus (Becker) (39 – 43) and Gonarcticus abdominalis (Zetterstedt) (44): 39 — end of female abdomen, ventral view; 40 — same, dorsal view; 41 — same, lateral view; 42 — male, habitus; 43, 44 — distribution maps.