Nanna articulata ( Becker, 1894 )

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 : 224

Nanna articulata ( Becker, 1894)

Figs 74–81 .

articulata Becker, 1894: 117 (Amaurosoma) . Type-locality: “Rothkirch” [=Czerwony Kościół (51.186N 16.061E)] ( Poland).

Remarks. Noted by Gorodkov (1970: 449; 1986: 18) for European part of Russia without indicating specific locality.

Material examined. Moscow and Moscow Oblast: Izmaylovo (55.7867N 37.8350E, 55.7870N 37.8338E, 55.7872N 37.8365E), 11.V.2007, 11.V., 12. VI.2009, A.L. Ozerov (10 ♂♂, 9 ♀♀, ZMUM); Golitsyno (55.6496N 37.0117E), 21.V.1977, A. Shatalkin (1 ♂, ZMUM); Dmitrov env. (56.3163N 37.7258E), 27.V.2009, N. Vikhrev (1 ♂, ZMUM); Naro-Fominsk (55.3955N 36.7823E), 1.V.2008, D. Gavryushin (1 ♀, ZMUM); Tatarstan: Volzhsko- Kamskiy Reserve, Lake Raifa (55.897357N 48.733022E), 11 and 20.V.2005, Basov (2 ♀♀, ZMUM);

Diagnostic description. Body-length 3.5–4.5 mm. Head. Frons black in upper part and reddish-yellow in lower quarter. 2 orbital setae present. Antenna black. Postpedicel with acutely angled upper apical corner, approximately 3 times as long as wide, in male slightly wider than in female. Thorax black, extensively grey dusted. Proepisternum without hairs in central part. Katepisternum with 3 strong setae: anterior katepisternal seta black and the rest pale in male and all black in female. Legs yellow, only tarsi slightly darkened. Fore femur with 6–8 anteroventral setae ( Fig. 74 ). Hind tibia without apical posteroventral seta. Wing clear. Abdomen black, greyish dusted. Male sternite 4 rectangular, approximately 2 times as long as wide ( Fig. 75 ). Male sternite 5 with black lobes, as in Figs 78, 79 . Epandrium, cerci and surstyli as in Figs 76, 77 . Female sternite 8 as two small separate sclerites ( Fig. 80 ).

Distribution. Russia ( Fig. 81 ): Moscow and Moscow Oblast, Tatarstan.—Europe.

Figures

FIGURES 74 – 81. Nanna articulata (Becker): 74 — fore femur, anterior view; 75 — male sternite 4; 76 — epandrium, cerci and surstyli, lateral view; 77 — same, dorsal view; 78 — male sternite 5; 79 — same, lateral view; 80 — female abdominal sternites 7 and 8; 81 — distribution map.