Nanna longicornis

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 : 240

Nanna longicornis (von Roser, 1840)

Figs 134–139 .

longicornis von Roser, 1840: 59 ( Cordylura ). Type-locality: not given (?Württemberg). “ longirostris ”, error ( Ozerov, 2010d: 3, 5).

Remarks. This species was recorded for the first time for Russia by Ozerov (2010d: 5) from Karelia.

Material examined. Karelia: Reserve “Kivach” [ca. 62.2672N 33.9822E], 26.VI.2001 and 27.V.2003, Polevoy (1 ♂, 2 ♀♀, ZMUM); Novosibirsk Oblast: 55.52N, 83.24E, pine forest and bog, 22.V.2010, Kosterin (1 ♀, ZMUM).

Diagnostic description. Body-length about 4 mm. Head. Frons black in upper half and yellow in lower half. 2 orbital setae present. Antenna black. Postpedicel with a few acutely angled upper apical corner, approximately 4 times as long as wide. Thorax black, grey dusted, but scutum with four shining spots, also anepisternum and katepisternum with shining spots. Proepisternum with hairs in central part. Katepisternum with strong and usually pale upper posterior and lower posterior katepisternal setae. Legs yellow, only mid and hind coxae, and tarsi slightly darkened. Fore femur without or with one anteroventral seta ( Fig. 134 ). Hind tibia with apical posteroventral seta, which is sometimes shorter than anteroventral apical seta. Wing tinged with brownish. Abdomen black, greyish dusted. Male sternite 4 rectangular, approximately 2 times as long as wide ( Fig. 138 ). Male sternite 5 with black lobes, as in Fig. 135 . Epandrium, cerci and surstyli as in Figs 136, 137 . Female sternite 8 as two small separate sclerites.

Distribution. Russia ( Fig. 139 ): Karelia, Novosibirsk Oblast.—Europe.

Figures

FIGURES 134 – 139. Nanna longicornis (von Roser): 134 — fore femur, anterior view; 135 — male sternite 5; 136 — epandrium, cerci and surstyli, lateral view; 137 — same, dorsal view; 138 — male sternite 4; 139 — distribution map.