Stegana (Steganina) lancang 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 lancang

description: Stegana (Steganina) lancang Li & Chen, sp. nov.
(Figs. 10E, 10F, 46)
Diagnosis. This species is similar to S. (S.) kanmiyai Okada & Sidorenko, 1992 in the shape of male terminalia (as fig. 3E–G in Okada & Sidorenko 1992, Fig. 46A–G), but can be distinguished from the latter by having the brownish yellow body color (Fig. 10E, F); the surstylus with 1 peg-like tooth near distal margin (Fig. 46A, B); the aedeagus lacking pubescence distolaterally (Fig. 46C, D).
Description. Male: Clypeus and palpus yellow. Mesonotum brownish yellow (Fig. 10E). Katepisternum yellowish (Fig. 10F). Scutellum brownish yellow, brownish near distal margin (Fig. 10E). Halter mostly grey (Fig. 10F). Fore femur with a row of 3 strong setae on distal part of posteroventral surface. Abdominal tergites brownish yellow (Fig. 10E, F); sternites yellow, about 2 times as wide as long. Male terminalia (Fig. 46A–G): Epandrium with 13 setae on dorsal to posterior portions per side (Fig. 46A). Surstylus with numerous setulae distally and some minute, serrated processes distoventrally (Fig. 46C, D). Aedeagal sheath acute apically, with 1 pair of acute processes subapically (Fig. 46E, F). Subepandrial sclerite vaulted (Fig. 46G). Female terminalia (Fig. 46H–J): Epiproct with several setae on distal 1/3 (Fig. 46H). Cercus and hypoproct with numerous setae and much pubescence (Fig. 46H, J). Eight sternite about 2 times as long as wide, mostly glabrous except with some setae distally (Fig. 46I).
Measurements and indices. BL = 2.74 mm in holotype (2.33–2.67 in 5♂, 2.39–2.73 in 4♀ paratypes), ThL = 1.32 mm (1.21–1.31 in ♂, 1.21–1.37 in ♀), WL = 2.48 mm (2.16–2.43 in ♂, 2.27–2.63 in ♀), WW = 0.99 mm (0.95–1.02 in ♂, 0.95–1.05 in ♀), arb = 6/4 (6–8/4–5), avd = 0.88 (0.74–0.89), adf = 1.05 (1.00–1.74), flw = 1.81 (1.56–2.15), FW/HW = 0.47 (0.34–0.43), ch/o = 0.27 (0.22–0.30), prorb = 0.93 (0.77–1.53), rcorb = 0.60 (0.62–0.91), vb = 0.52 (0.46–0.83), dcl = 0.87 (0.59–0.87), presctl = 0.52 (0.60–0.84), sctl = damaged (1.41–1.94), sterno = 0.52 (0.63–1.08), orbito = 1.80 (1.59–1.96), dcp = 0.30 (0.24–0.35), sctlp = 1.67 (1.27–2.19), C = 1.76 (1.65–2.11), 4c = 1.26 (0.96–1.30), 4v = 1.86 (1.44–1.84), 5x = 1.59 (1.26–1.76), ac = 10.67 (8.17–11.00), M = 0.67 (0.55–0.72), C3F = 0.68 (0.57–0.66).
Type materials. Holotype ♂ (SCAU, No. 125697, DNA #2637), CHINA: Guanlei, Mengla, Yunnan, 21°38'39''N, 101°09'52''E, alt. 560m, 24.iv.2016, ex tree trunk, J. Huang. Paratypes: 4♀ (SCAU, Nos. 125698–701, DNA #2637), other data same as holotype; 8♂ (SCAU, Nos. 125702–09, DNA #2638), Wangtianshu, Mengla, Yunnan, 21°36'09''N, 101°35'06''E, alt. 560m, 17.xii.2017, ex tree trunks, H.W. Chen, L. Gong.
Distribution. China (Yunnan).
Etymology. From the word " lancang " in Dai language from the Dai nationality living in Yunnan, China, referring to the Lancang River.
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 79-80, DOI: 10.11646/zootaxa.5250.1.1, http://zenodo.org/record/7705657