Stegana (Steganina) montana, Chen, Xi-Peng & Chen, Hong-Wei, 2012

Chen, Xi-Peng & Chen, Hong-Wei, 2012, Ten new species of the Stegana (Steganina) shirozui species group (Diptera, Drosophilidae) from China, Zootaxa 3333, pp. 24-37 : 28-29

Stegana (Steganina) montana sp. nov.

( Figs 21–27 )

Diagnosis. This species is related to S. dianensis sp. nov., but clearly distinguishable from the latter by the scutellum and tenth sternite, in this species: scutellum yellow medially, black laterally; tenth sternite expanded distally ( Fig. 23 ).

Description. Male terminalia: Epandrium broadened on posterior margins, wider than 3/5 high, pointedly protruded ventrally ( Fig. 21 ). Cercus lacking pubescence ( Fig. 21 ). Surstylus with 6 prensisetae submedially ( Fig. 22 ). Tenth sternite furcated basally ( Fig. 23 ). Paramere with ca. 3 sensilla ( Figs 24, 25 ). Aedeagal opening slightly infundibular in ventral view ( Figs 24, 25 ). Gonopods acute apically, with broadened, medially depressed projection dorsomedially ( Fig. 27 ).

Measurements. BL = 3.04 mm in holotype (range in 43 and 5Ƥ paratypes: 2.80–3.20 mm in 3, 2.90–3.25 mm in Ƥ), ThL = 1.85 mm (1.83–1.88 mm in 3, 1.60–1.80 mm in Ƥ), WL = 3.35 mm (3.20–3.50 mm in 3, 3.28– 3.65 mm in Ƥ), WW = 1.50 mm (1.45–1.50 mm in 3, 1.44–1.45 mm in Ƥ), arb = 9/5 (7–9/4–5), avd = 0.75 (0.68– 0.83), adf = 1.78 (1.45–1.64), flw = 1.89 (1.71–1.83), FW/HW = 0.41 (0.40–0.43), ch/o = 0.16 (0.15–0.16), prorb = 1.25 (1.18–1.19), rcorb = 0.75 (0.75–0.88), vb = 0.47 (0.33–0.47), dcl = 0.46 (0.41–0.52), sctl = 1.35 (1.30–1.45), sterno = 0.83 (0.82–0.86), orbito = 1.60 (1.60–1.80), dcp = 0.23 (0.22–0.23), sctlp = 2.11 (1.78–2.00), C = 2.00 (1.77–2.09), 4c = 1.03 (1.06–1.10), 4v = 1.60 (1.50–1.67), 5x = 1.60 (1.45–1.67), ac = 12.00 (10.60–12.00), M = 0.46 (0.43–0.52), C3F = 0.70 (0.71–0.78).

Type material. Holotype 3 ( SCAU, No. 120745), CHINA: Mt. Wuliang, Nanjian, Yunnan, 2450 m, 25.vii.2006, HL Cao. Paratypes: CHINA: 1238Ƥ (333Ƥ in KIZ; 935Ƥ in SCAU, Nos 120746 -59), same data as holotype except 25–28.vii.2006, HL Cao, HZ Cao, T Li; 632Ƥ ( SCAU, Nos 120760 -67), Mt. Wuliang, Jingdong, Yunnan, 4.viii.2006, HL Cao, HZ Cao, T Li; 532Ƥ ( SCAU, No. 121081 -87), Menghai, Xishuangbanna , Yunnan, 21°50' N, 100°08' E, 1940 m, 8.iv.2011, JM Lu, ZF Shao, YR Su, SJ Yan.

Distribution. China (Yunnan).

Etymology. From the Latin word “montanus” (= montaneous), referring to the specimens collected in mountains.

Figures

FIGURE 21 – 27. Stegana (Steganina) montana sp. nov., male terminalia: 21. Epandrium, cercus and surstylus; 22. surstylus; 23. 10 th sternite; 24, 25. hypandrium, aedeagus and aedeagal apodeme; 26, 27. gonopods. Scale bars: 0.1 mm.