Revision of the subgenus Stegana (Steganina) from China, with assessment of species delimitation using DNA barcodes (Diptera, Drosophilidae) Author WANG, YA-LIAN Author LI, BING-XUE Author CUI, MENG-DI Author ZHANG, YUAN Author WANG, LE Author ZHANG, CAI-HONG Author TSAUR, SHUN-CHERN Author CHEN, HONG-WEI Author HUANG, JIA text Zootaxa 2023 2023-03-07 5250 1 1 109 http://dx.doi.org/10.11646/zootaxa.5250.1.1 journal article 53812 10.11646/zootaxa.5250.1.1 da8acfed-df61-403e-9a49-7f856ce56196 1175­5334 7705657 4729EAF3-8B78-4AAD-B373-9179D008F239 Stegana ( Steganina ) yani Li & Chen , sp. nov. ( Figs. 14A, 14B , 63 ) Diagnosis. This species is similar to S . ( S .) cornuta sp. nov. in the shape of epandrium, surstylus, cercus ( Figs. 32A, 32B , 63A ), aedeagus ( Figs. 32C, 32D , 63B, 63C ), and subepandrial sclerite ( Figs.32E, 32F , 63D, 63E ), but can be distinguished from the latter by having the cercus with sparse pubescence ( Fig. 63A ); the pregonite blurry or absent ( Fig. 63B, C ); the subepandrial sclerite nearly triangular ( Fig. 63F ). FIGURE 63. Stegana ( Steganina ) yani Li & Chen , sp. nov. , male terminalia. A. Epandrium, surstylus, and cercus in lateral view; B, C. Hypandrium, aedeagus, and phallapodeme in ventral and lateral views; D, E. Aedeagal sheath in ventral and lateral views; F. Subepandrial sclerite in ventral view. Description. Male and female: First flagellomere brown. Clypeus brown. Mesonotum brownish ( Fig. 14A ). Katepisternum yellowish ( Fig. 14B ). Scutellum brown ( Fig. 14A ). Halter mostly grey ( Fig. 14B ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites dark brown ( Fig. 14A, B ); sternites dark brown, about 1.2 times as wide as long. Male terminalia ( Fig. 63 ): Epandrium with ca . 12 setae on dorsal to posterior portions per side ( Fig. 63A ). Surstylus with 1 peg-like tooth and some setulae near distal margin, lacking serrated process and pubescence ( Fig. 63A ). Hypandrium roundly expanded anteromedially ( Fig. 63B, C ). Aedeagus with numerous minute, serrated processes distodorsally and much pubescence distoventrally ( Fig. 63B, C ). Aedeagal sheath distally slender, strongly dorsad curved, and with some minute, serrated processes ( Fig. 63D, E ). Measurements and indices. BL = 2.39 mm in holotype ( 2.25–2.57 in 5♂, 2.47–3.05 in 5♀ paratypes ), ThL = 1.07 mm ( 1.14–1.29 in ♂, 0.99–1.46 in ♀ ), WL = 2.21 mm ( 2.12–2.43 in ♂, 2.14–2.66 in ♀ ), WW = 0.92 mm ( 0.93–1.04 in ♂, 0.94–1.07 in ♀ ), arb = 6/4 (6–8/4–5), avd = 0.81 (0.75–0.89), adf = 1.17 (0.80–1.32), flw = 2.00 (1.41–2.22), FW/HW = 0.43 (0.37–0.43), ch/o = 0.34 (0.24–0.42), prorb = 1.17 (0.72–1.36), rcorb = 0.60 (0.69– 0.87), vb = 0.74 (0.68–1.13), dcl = 0.53 (0.65–0.94), presctl = 0.76 (0.46–0.84), sctl = 2.52 (1.25–2.69), sterno = 0.73 (0.64–1.07), orbito = 1.63 (1.61–2.41), dcp = 0.35 (0.31–0.36), sctlp = 1.95 (1.65–2.17), C = 1.87 (1.57–1.84), 4c = 1.23 (0.91–1.36), 4v = 2.06 (1.47–2.19), 5x = 1.13 (1.31–1.82), ac = 9.88 (8.55–11.22), M = 0.56 (0.55–0.76), C3F = 0.62 (0.53–0.70). Type materials. Holotype ♂ ( SCAU , No.125732, DNA #2179), CHINA : Qimaba , Lüchun , Yunnan , 22°49'08''N , 102°17'25''E , alt. 600m , 30.x.2016 , ex tussock, H.W. Chen . Paratypes : 1♀ ( SCAU , No. 125734, DNA #2182), Er'pu , Lüchun , Yunnan , 22°37'06''N , 102°21'06''E , alt. 600m , 28.x.2016 , ex tree trunk, H.W. Chen ; 2♂, 3♀ ( SCAU , Nos. 125735–39, DNA #2728), Longtan Park , Ximeng , Yunnan , 22°38'55''N , 99°36'02''E , alt. 1150m , 17.iv.2018 , ex tree trunks, H.W. Chen , L. Gong , Y. Lin ; 1♀ ( SCAU , No. 125733, DNA #2188), Botanic Garden , Ruili , Yunnan , 24°04'19''N , 97°49'08''E , alt. 1150m , 22.iv.2018 , ex tree trunk, H.W. Chen ; 4♂ ( SCAU , Nos. 125740–43, DNA #2643, 2744), Menglun , Mengla , Yunnan , 21°47'29''N , 101°22'59''E , alt. 560m , 16,17. iv.2007 , ex tree trunks, H.W. Chen , J.J. Gao , F. Zhao . Distribution. China ( Yunnan ). Etymology. From the word " yani " in Hani language from the Hani nationality living in Yunnan , China , referring to the meaning "dreamlike hometown".