Stegana (Steganina) nigridentata Li & Chen, sp. nov.
Creators: name: WANG, YA-LIAN
name: LI, BING-XUE
name: CUI, MENG-DI
name: ZHANG, YUAN
name: WANG, LE
name: ZHANG, CAI-HONG
name: TSAUR, SHUN-CHERN
name: CHEN, HONG-WEI
name: HUANG, JIA
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana
Stegana nigridentata

description: Stegana (Steganina) nigridentata Li & Chen, sp. nov.
(Figs. 12E, 12F, 55)
Diagnosis. This species is similar to S. (S.) menghai sp. nov. in the shape of male terminalia (Figs. 50, 55), but can be distinguished from the latter by having the pregonite blurry or absent (Fig. 50B, C); the aedeagus laterally deeply dehiscent and with 4 small black teeth per side, distally lacking serrated process (Fig. 55B, C).
Description. Male and female: First flagellomere dark brown. Clypeus dark brown medially, yellow laterally. Mesonotum brown to black medially, brownish yellow to brown laterally (Fig. 12E). Katepisternum yellow above, brownish below (Fig. 12F). Scutellum dark brown to black (Fig. 12E). Halter mostly grey (Fig. 12F). Fore femur with a row of 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites mostly black (Fig. 12E, margin, lacking pubescence (Fig. 55A). Cercus with much pubescence (Fig. 55A). Hypandrium expanded anteromedially (Fig. 55B, C). Aedeagal sheath distally dorsad curved and with numerous minute, serrated processes (Fig. 55D, E). Subepandrial sclerite vaulted (Fig. 55F).
Measurements and indices. BL = 3.28 mm in holotype (2.88–3.52 in 5♂, 3.24–4.20 in 5♀ paratypes), ThL = 1.44 mm (1.43–1.80 in ♂, 1.76–2.05 in ♀), WL = 2.44 mm (2.36–3.00 in ♂, 2.72–3.24 in ♀), WW = 1.20 mm (1.10–1.40 in ♂, 1.208–1.60 in ♀), arb = 14/5 (8–14/4–6), avd = 0.60 (0.44–0.91), adf = 1.43 (1.57–2.25), flw = 1.57 (1.50–2.60), FW/HW = 0.38 (0.27–0.38), ch/o = 0.22 (0.13–0.27), prorb = 1.25 (0.75–1.14), rcorb = 0.92 (0.58–1.17), vb = 0.75 (0.29–0.67), dcl = 0.75 (0.27–0.75), presctl = 0.63 (0.50–0.93), sctl = 1.50 (1.24–1.93), sterno = 0.92 (0.59–0.82), orbito = 2.60 (1.67–2.50), dcp = 0.21 (0.18–0.26), sctlp = 1.73 (1.50–2.27), C = 2.62 (1.73–2.25), 4c = 0.81 (1.09–1.26), 4v = 1.63 (1.63–2.19), 5x = 1.60 (1.36–2.00), ac = 13.00 (10.00–21.25), M = 0.50 (0.50–0.81), C3F = 0.57 (0.69–0.82).
Type materials. Holotype ♂ (SCAU, No. 121132), CHINA: Maoershan, Xing'an, Guangxi, 25°51'28''N, 110°25'01''E, alt. 700m, 23.x.2004, ex tree trunk, H.W. Chen. Paratypes: 6♂, 18♀ (SCAU, Nos. 121133–56, DNA #1461, 1462), 19.x.2006, other data same as holotype; 2♀ (SCAU, Nos. 125606, 07, DNA #2190), Yixiang, Pu'er, Yunnan, 22°44'19''N, 101°07'01''E, alt. 1400m, 13.v.2012, ex tree trunks, J.J. Gao.
Distribution. China (Guangxi, Yunnan).
Etymology. A combination of the Latin words " niger " (= black) and " dentatus " (= dentate), referring to the aedeagus laterally with 4 small black teeth.
description: Published as part of WANG, YA-LIAN, LI, BING-XUE, CUI, MENG-DI, ZHANG, YUAN, WANG, LE, ZHANG, CAI-HONG, TSAUR, SHUN-CHERN, CHEN, HONG-WEI & HUANG, JIA, 2023, Revision of the subgenus Stegana (Steganina) from China, with assessment of species delimitation using DNA barcodes (Diptera, Drosophilidae), pp. 1-109 in Zootaxa 5250 (1) on pages 90-91, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657