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 ) 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 ). FIGURE 55. Stegana ( Steganina ) nigridentata 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 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.