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 ) menghai Zhang & Chen , sp. nov. ( Figs. 11E, 11F , 50 ) Diagnosis. This species slightly resembles S . ( S .) nigridentata sp. nov. in the shape of epandrium, surstylus, cercus ( Figs. 50A , 55A ), and subepandrial sclerite ( Figs. 50F , 55F ), but can be distinguished from the latter by having the small pregonite with 4 sensilla ( Fig. 50B, C ); the aedeagus with numerous minute, serrated processes distally ( Fig. 50B, C ); the aedeagal sheath distally cambered, not strongly expanded ( Fig. 50D, E ). Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum broadly dark brown medially, brown laterally ( Fig. 11E ). Katepisternum mostly yellowish, brownish on anterior corner ( Fig. 11F ). Scutellum dark brown, yellow at tip ( Fig. 11E ). Halter mostly grey ( Fig. 11F ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites black ( Fig. 11E, F ); sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 50 ): Epandrium with ca . 14 setae on dorsal to posterior portions per side ( Fig. 50A ). Surstylus with 1 peg-like tooth, several setulae, and some pubescence near distal margin ( Fig. 50A ). Cercus with much pubescence ( Fig. 50A ). Hypandrium roundly expanded anteromedially ( Fig. 50B, C ). Aedeagus roundly expanded distally, lacking pubescence ( Fig. 50B, C ). Aedeagal sheath with numerous minute, serrated processes distally ( Fig. 50D, E ). Subepandrial sclerite vaulted, roundly expanded dorsally ( Fig. 50F ). Measurements and indices. BL = 3.00 mm in holotype ( 3.07 in 2♂, 2.93–3.67 in 5♀ paratypes ), ThL = 1.47 mm ( 1.33 in ♂, 1.27–2.27 in ♀ ), WL = 2.00 mm ( 2.33 in ♂, 2.20–2.60 in ♀ ), WW = 1.00 mm ( 1.20 in ♂, 1.00– 1.27 in ♀ ), arb = 6/3 (7–8/3–5), avd = 0.89 (0.80–1.60), adf = 1.13 (0.63–1.25), flw = 1.63 (1.20–1.75), FW/HW = 0.38 (0.32–0.48), ch/o = 0.28 (0.24–0.40), prorb = 1.50 (0.71–1.25), rcorb = 0.80 (0.56–0.81), vb = 0.40 (0.27–0.36), dcl = 0.57 (0.32–0.57), presctl = 0.63 (0.50–0.71), sctl = 2.73 (1.43–3.50), sterno = 0.95 (0.65–0.87), orbito = 2.00 (2.00–2.50), dcp = 0.21 (0.20–0.34), sctlp = 2.00 (1.88–2.78), C = 1.90 (1.60–1.83), 4c = 1.25 (1.11–1.38), 4v = 1.88 (1.78–2.25), 5x = 2.00 (1.67–1.75), ac = 6.67 (6.50–12.00), M = 1.00 (0.56–0.88), C3F = 0.80 (0.67–0.82). Type materials. Holotype ♂ ( SCAU , No. 125641, DNA #1433), CHINA : Hesong , Menghai , Yunnan , 21°50'17''N , 100°05'48''E , alt. 1600m , 7.v.2012 , ex tree trunk, H.W. Chen . Paratypes : 5♀ ( SCAU , Nos. 125642–46, DNA #2657), other data same as holotype ; 2♂, 1♀ ( SCAU , Nos. 125647–49, DNA #2732), Botanic Garden , Ruili , Yunnan , 24°04'19''N , 97°49'08''E , alt. 1150m , 22.iv.2018 , ex tree trunks, H.W. Chen . Distribution. China ( Yunnan ). Etymology. From the name of the type locality "Menghai".