Stegana (Steganina) angustigena Cheng, Gao &amp; Chen, 2009, sp. nov.
Creators: name: Cheng, Yu
name: Gao, Jian-Jun
name: Chen, Hong-Wei
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana
Stegana angustigena

description: <i>Stegana</i> (<i>Steganina</i>) <i>angustigena</i> sp. nov. (Figs 7–10) <b>Specimens examined.</b> Holotype: &amp;male; (SCAU, No. 120621), CHINA: Jianfengling, Ledong, Hainan, 18°41' N, 108°52' E, altitude 700 m, 19.v.2004, on tree trunks, HW Chen. Paratypes: CHINA: 6&amp;male; 10&amp;female; (3&amp;male; 5&amp;female; in KIZ; 3&amp;male; 5&amp;female; in SCAU, Nos 120692-99), same data as holotype except for 20.iv.2008, XP Chen, JJ Gao; 2&amp;male; 3&amp;female; (SCAU, Nos 120622-26), Wuzhishan, Hainan, 18°48ʹ N, 109°19ʹ E, altitude 440 m, 20.iv.2007, on tree trunks, HZ Cao, T Li; 1&amp;male; (SCAU, No. 120627), Nonggang, Chongzuo, Guangxi, 22°33ʹ N, 106°92ʹ E, altitude 230 m, 23.viii.2004, on tree trunks, HW Chen; 4&amp;female; (KIZ), Menglun, Xishuangbanna, Yunnan, 21°41' N, 101°25' E, altitude 880 m, 16–19.iv.2007, <i>ex</i> tussock, JJ Gao; 3&amp;male; 14&amp;female; (1&amp;male; 1&amp;female; on tree trunks) (1&amp;male; 6&amp;female; in KIZ; 1&amp;male; 6&amp;female; in SCAU, Nos 120628-34, 1&amp;male; 2&amp;female; in SEHU), Mengla, Xishuangbanna, Yunnan, 21°28' N, 101°38' E, altitude 600 m, 21–24.iv.2007, <i>ex</i> tussock, HW Chen, JJ Gao, F Zhao. <b>Diagnosis.</b> Surstylus strongly curved submedially (Fig. 8); aedeagus composed of 1 lobe-like and 1 pair of slender, rod-like processes; the lobe-like process bifurcated distally, with pubescence (Fig. 10). <b>Description.</b> Male and female: Pedicel brown; first flagellomere black. Palpus black. Mesonotum brown to dark brown, without stripe. Scutellum dark brown to black. Katepisternum brown on upper part, yellow on lower part. Legs white-yellow, brown on apical part of fore femur, dark brown to black medially on mid and hind femora, with 2 dark brown rings on all tarsomeres. Fore femur with 4–5 setae on distal part of ventral surface. All abdominal tergites and sternites dark brown to black. Male terminalia: Epandrium with approximately 30 setae near posterior to ventral margin on each body-side (Fig. 7). Cercus lacking pubescence (Fig. 7). Plate between hypandrium and aedeagus slightly pubescent (Fig. 10). <b>Measurements.</b> BL = 2.25 mm in holotype (range in 4&amp;male; 5&amp;female; paratypes: 2.13–2.47 mm in &amp;male;, 2.28–2.91 mm in &amp;female;); ThL = 1.13 mm (1.00– 1.22 mm in &amp;male;, 1.09–1.38 mm in &amp;female;); WL = 1.84 mm (1.74–1.90 mm in &amp;male;, 1.88–2.28 mm in &amp;female;); WW = 1.00 mm (0.98–1.24 mm in &amp;male;, 1.04–1.26 mm in &amp;female;). Indices: arb = 8/6 (7–9/6–7), avd = 0.86 (0.67–0.82), adf = 1.27 (1.36–1.80), flw = 1.91 (1.80–2.10), FW/HW = 0.34 (0.33–0.40), ch/o = 0.06 (0.06–0.09), prorb = 1.28 (1.05–1.25), rcorb = 0.78 (0.71–0.94), vb = 0.21 (0.20–0.33), dcl = 0.40 (0.38– 0.47), presctl = 0.54 (0.47–0.61), sctl = 1.29 (1.46–1.72), sterno = 0.81 (0.80–0.93), orbito = 2.50 (2.00–2.50), dcp = 0.20 (0.16–0.24), sctlp = 1.06 (0.94–1.18), C = 1.89 (1.78–2.12), 4c = 1.33 (1.17–1.37), 4v = 1.81 (1.68–1.81), 5x = 1.30 (1.08–1.30), ac = 9.33 (7.50–10.00), M = 0.62 (0.52–0.62), C3F = 0.69 (0.56–0.73). <b>Distribution.</b> China (Guangxi, Hainan, Yunnan). <b>Etymology.</b> A combination of the Latin words: angustus and gena, referring to the narrow gena.
description: Published as part of <i>Cheng, Yu, Gao, Jian-Jun &amp; Chen, Hong-Wei, 2009, Stegana ornatipes species group from the Oriental Region (Diptera: Drosophilidae), pp. 37-48 in Zootaxa 2216 (1)</i> on pages 41-42, DOI: 10.11646/zootaxa.2216.1.3, http://zenodo.org/record/5321864