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 ) nayun Li & Chen , sp. nov. ( Figs. 12C, 12D , 54 ) Diagnosis. This species is similar to S . ( S .) cylindrica Wang, Gao, & Chen, 2013 in the shape of male terminalia (as fig. 2 in Wang et al. 2013 , Fig. 54 ), but can be distinguished from the latter by having the tubular aedeagus distoventrally with 3 rugae per side, lacking pubescence ( Fig. 54C, D ); the subepandrial sclerite lacking pubescence ( Fig. 54G ). Description. Male and female: First flagellomere brownish. Clypeus yellow. Mesonotum brown medially, brownish yellow laterally ( Fig. 12C ). Katepisternum yellow ( Fig. 12D ). Scutellum brown medially, dark brown laterally, yellow at tip ( Fig. 12C ). Halter mostly grey ( Fig. 12D ). Fore femur with a row of 4 long setae on distal part of posteroventral surface. Abdominal tergites brown to dark brown; sternites brown, about 2 times as wide as long. Male terminalia ( Fig. 54A–G ): Epandrium with ca . 11 setae on dorsal to posterior portions per side ( Fig. 54A ). Surstylus with 1 peg-like tooth and some setulae near distal margin, lacking pubescence ( Fig. 54A, B ). Cercus lacking pubescence ( Fig. 54A ). Hypandrium strongly expanded anteromedially ( Fig. 54C, D ). Pregonite small, with 2 sensilla ( Fig. 54C, D ). Aedeagus lacking serrated process ( Fig. 54C, D ). Aedeagal sheath distally dorsad curved and with several minute, serrated processes ( Fig. 54E, F ). Subepandrial sclerite slightly rectangle distally ( Fig. 54G ). Female terminalia ( Fig. 54H–J ): Epiproct with several setae on distal 1/2 ( Fig. 54H ). Cercus and hypoproct with numerous setae and much pubescence ( Fig. 54H, J ). Eight sternite about 1.5 times as long as wide, glabrous on basal 4/5, with several setae and some pubescence on distal 1/5 ( Fig. 54I ). FIGURE 54. Stegana ( Steganina ) nayun Li & Chen , sp. nov. , male (A–G) and female terminalia (H–J). A. Epandrium, surstylus, and cercus in lateral view; B. Surstylus in ventral view; C, D. Hypandrium, pregonite, aedeagus, and phallapodeme in ventral and lateral views; E, F.Aedeagal sheath in ventral and lateral views; G. Subepandrial sclerite in ventral view; H. Epiproct and cercus in dorsal view; I. Eighth sternite in ventral view; J. Hypoproct in ventral view. HW = 0.38 (0.42), ch/o = 0.29 (0.38), prorb = 1.05 (1.50), rcorb = 0.79 (0.88), vb = 0.64 (0.93), dcl = 0.43 (0.35), presctl = 0.70 (0.70), sctl = 3.15 (2.39), sterno = 1.19 (0.93), orbito = 1.89 (1.89), dcp = 0.21 (0.21), sctlp = 1.78 (2.22), C = 1.98 (1.95), 4c = 1.05 (1.39), 4v = 1.20 (2.21), 5x = 1.54 (1.91), ac = 10.25 (13.00), M = 0.55 (0.76), C3F = 0.61 (0.70). Type materials. Holotype ♂ ( SCAU , No. 125730, DNA #2674), CHINA : Jinshan , Menglian , Yunnan , 22°19'29''N , 99°35'00''E , alt. 940m , 25.x.2017 , ex tree trunk, H.W. Chen . Paratypes : 1♀ ( SCAU , No. 125731, DNA #2693), other data same as holotype ; 1♀ ( SCAU , No. 125787, DNA #2608), Fengtongzhai , Baoxing , Sichuan , 30°32'42''N , 102°54'24''E , alt. 1500m , 18.vii.2017 , ex tree trunk, Y.L. Wang . Distribution. China ( Sichuan , Yunnan ). Etymology. From the name of the type locality "Jinshan" belonging to "Nayun, Menglian, Yunnan ".