Nanna inermis ( 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 : 231-235

Nanna inermis ( Becker, 1894)

Figs 111–116 .

inermis Becker, 1894: 119 (Amaurosoma) . Type-locality: “Livland” ( Latvia or Estonia).

albipilum Ringdahl, 1936: 177 ( Amaurosoma ). Type-locality: “Jämtland bei Vallbo” ( Sweden).

Material examined. Adygea: Lagonaki (44.01N 40.02E), 1500–1700 m, 11.VI.2012, 5–7.V.2013, N. Vikhrev (2 ♂♂, 3 ♀♀, ZMUM); Arkhangelsk Oblast: Nenetskiy Reserve, Cordon “Bol'shoy Gusinets” (68.1759N 53.6453E), 10.VII.2008, A.L. Ozerov (1 ♀, ZMUM); Krasnodar Kray: Sochi, Estosadk env., Mt. Psekhako (43.6911N 40.3666E), 14–18.VI.2008, K. Tomkovich (2 ♂♂, 2 ♀♀, ZMUM); Kursk Oblast: Streletskaya Steppe (51.5795N 36.0870E), 5–15.V.2008, K. Tomkovich (2 ♂♂, ZMUM); Leningrad Oblast and St.-Petersburg: Jukki (ca. 60.11N 30.29E), 18.V.1933, 27.V.1956, A. Stackelberg (9 ♂♂, 2 ♀♀, ZISP); Luga (ca. 58.73N 29.84E), 11.V.1954, A. Stackelberg (1 ♂, ZISP); Pesochnaya (60.1175N 30.1518E), 22.V.1966, K. Gorodkov (3 ♂♂, ZISP); Roshino (60.25N 29.61E), 20.V.1954, A. Stackelberg (2 ♂♂, 4 ♀♀, ZISP); Yashchera (58.8945N 29.8206E), 26.V.1957, A. Stackelberg (5 ♂♂, 2 ♀♀, ZISP); Komarovo (60.18N 29.81E), 13.V.1951 and 23.V.1954, A. Stackelberg (2 ♂♂, 1 ♀, ZISP); Udel'naya (ca. 60.01N 30.29E), 13.V.1952, 24.V.1956, A. Stackelberg (4 ♂♂, 2 ♀♀, ZISP); Moscow and Moscow Oblast: Petrovsko-Razumovskoe (55.8399N 37.5694E), 6.V.1931, N. Violovich (1 ♂, ZMUM); Andreevskoe (55.9783N 35.5885E), 14.V.2007, A.L. Ozerov (1 ♀, ZMUM); Burtsevo (55.9957N 35.6174E), 9–10.VI.2008, A.L. Ozerov (1 ♂, 1 ♀, ZMUM); Golitsyno (55.6496N 37.0117E), 20 and 27.V.1978, A. Shatalkin (1 ♂, 1 ♀, ZMUM); Dmitrov env. (56.3163N 37.7258E), 21.IV., 7–15.V.2007, N. Vikhrev (5 ♂♂, 1 ♀, ZMUM); Ivanovskoe (55.9338N 35.6275E), 14.V.2006, A.L. Ozerov (3 ♀♀, ZMUM); Mikhnevo (55.1258N 37.9620E), 17.V.1964, E. Antonova (1 ♂, ZMUM); Yakshino (55.9198N 35.5833E), 2.V.2008, A.L. Ozerov (1 ♂, ZMUM).

Diagnostic description. Body-length 3.0–5.0 mm. Head. Frons black in upper half and reddish-yellow in lower half. 3 orbital setae present. Antenna black. Postpedicel with acutely angled upper apical corner, approximately 2–2.5 times as long as wide, in male wider than in female. Thorax black, extensively grey dusted. Proepisternum with hairs in central part. Katepisternum with 3 strong setae, from yellow to black. Legs. All coxae and femora blackish, tibiae yellow, sometimes hind tibia darkened on apical half, tarsi slightly darkened. Fore femur without setae anteroventrally ( Fig. 111 ). Hind tibia without apical posteroventral seta. Wing clear or tinged with brownish. Abdomen black, greyish dusted. Male sternite 4 rectangular, approximately 2 times as long as wide ( Fig. 115 ). Male sternite 5 with black lobes, as in Fig. 112 . Epandrium, cerci and surstyli as in Figs 113, 114 . Female sternite 8 as two small separate sclerites.

Distribution. Russia ( Fig. 116 ): Adygea, Arkhangelsk Oblast, Krasnodar Kray, Kursk Oblast, Leningrad Oblast and St.-Petersburg, Moscow and Moscow Oblast.—Europe; Mongolia (Šifner, 1975: 220).

Figures

FIGURES 111 – 116. Nanna inermis (Becker): 111 — fore femur, anterior view; 112 — male sternite 5; 113 — epandrium, cerci and surstyli, lateral view; 114 — same, dorsal view; 115 — male sternite 4; 116 — distribution map.