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 10.11646/zootaxa.5250.1.1 1175­5334 7705657 4729EAF3-8B78-4AAD-B373-9179D008F239 Stegana ( Steganina ) cornuta Li & Chen , sp. nov. ( Figs. 7A, 7B , 32 ) Diagnosis. This species closely resembles S . ( S .) angulistrata Wu & Chen, 2010 in the shape of male terminalia (as fig. 1–6 in Wu & Chen 2010 , Fig. 32 ), but can be distinguished from the latter by having the aedeagus medially lacking serrated process but mediolaterally with a pair of horned processes ( Fig. 32C, D ); the aedeagal sheath distally slender and strongly dorsad curved ( Fig. 32E, F ). Description. Male and female: First flagellomere brown. Clypeus yellow. Mesonotum yellow ( Fig. 7A ). Katepisternum yellowish ( Fig. 7B ). Scutellum yellow ( Fig. 7A ). Halter mostly grey ( Fig. 7B ). Fore femur with a row of 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites brown to dark brown ( Fig. 7A, B ); sternites brown, slightly wider than long. Male terminalia ( Fig. 32 ): Epandrium with ca . 9 setae on dorsal to posterior portions per side ( Fig. 32A ). Surstylus with 1 prensiseta, several setulae, and serrated processes near distal margin ( Fig. 32A, B ). Cercus lacking pubescence ( Fig. 32A ). Hypandrium expanded anteromedially ( Fig. 32C, D ). Pregonite small, with 2 sensilla ( Fig. 32C, D ). Aedeagus rounded distally, with numerous minute, serrated processes laterally and much pubescence distoventrally and sublaterally ( Fig. 32C, D ). Aedeagal sheath with some minute, serrated processes distally ( Fig. 32E, F ). Subepandrial sclerite slightly vaulted, split medially ( Fig. 32G ). Measurements and indices. BL = 3.00 mm in holotype ( 2.34–3.04 in 4♁, 2.88–3.44 in 5♀ paratypes ), ThL = 1.48 mm ( 1.21–1.46 in ♁, 1.29–1.80 in ♀ ), WL = 2.32 mm ( 2.31–2.59 in ♁, 2.43–2.72 in ♀ ), WW = 1.20 mm ( 0.97–1.09 in ♁, 0.91–1.24 in ♀ ), arb = 9/5 (6–9/4–6), avd = 0.83 (0.76–0.93), adf = 1.50 (0.91–1.29), flw = 2.50 (1.74–2.16), FW/HW = 0.48 (0.27–0.46), ch/o = 0.17 (0.26–0.37), prorb = 1.50 (0.53–1.41), rcorb = 0.70 (0.59– 1.16), vb = 0.56 (0.46–1.22), dcl = 0.33 (0.43–0.69), presctl = 0.57 (0.39–0.63), sctl = 2.23 (1.47–2.27), sterno = 0.64 (0.53–0.96), orbito = 1.40 (1.67–1.98), dcp = 0.28 (0.16–0.39), sctlp = 1.89 (1.55–2.08), C = 1.74 (1.53–2.13), 4c = 1.55 (1.06–1.38), 4v = 2.40 (1.36–2.10), 5x = 1.50 (1.06–2.00), ac = 15.50 (8.36–17.55), M = 0.75 (0.58–0.72), C3F = 0.81 (0.56–0.71). Type materials. Holotype ♁ ( SCAU , No. 125586, DNA #1414, 2665), CHINA : Yixiang , Pu'er , Yunnan , 22°44'19''N , 101°07'01''E , alt. 1420m , 13.v.2012 , ex tree trunk, H.W. Chen . Paratypes : 2♁, 5♀ ( SCAU , Nos. 125587–93, DNA #1414, 1939, 2665, 2702), 1 ♁, 1♀ on 28–30.iii.2013 , J.J. Gao , other data same as holotype; 1♁ ( SCAU , No. 125594, DNA #2173), Mengdong , Cangyuan , Yunnan , 23°10'08''N , 99°13'52''E , alt. 1320m , 10.v.2016 , ex tree trunk, J. Huang . Distribution. China ( Yunnan ).