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 ) cultella Cui & Chen , sp. nov. ( Figs. 7E, 7F , 34 ) Diagnosis. This species resembles S . ( S .) fusca sp. nov. in the small body size (BL ranged from 2.12–2.39 mm in measured specimens) and the relatively light body color ( Figs. 7E, 7F , 8I, 8J ), but can be distinguished from the latter by having the cercus with much pubescence ( Fig. 34A ); the aedeagus dramatically expanded distally, lacking pubescence ( Fig. 34C, D ). FIGURE 34. Stegana ( Steganina ) cultella Cui & Chen , sp. nov. , male terminalia. 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. Description. Male: First flagellomere black. Clypeus yellow. Mesonotum and scutellum brownish yellow ( Fig. 7E, F ). Katepisternum yellow ( Fig. 7F ). Halter mostly yellow, with a brownish patch at knob ( Fig. 7E ). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites brown medially, brownish near distal margin ( Fig. 34A, B ). Hypandrium roundly expanded anteromedially ( Fig. 34C, D ). Pregonite with 7 sensilla ( Fig. 34C, D ). Aedeagal sheath distally dorsad curved ( Fig. 34E, F ). Subepandrial sclerite slightly vaulted, broadened distally ( Fig. 34G ). Measurements and indices. BL = 2.39 mm in holotype ( 2.12 in 1♂ paratype ), ThL = 1.21 mm (0.88), WL = 2.36 mm (1.46), WW = 1.00 mm (0.64), arb = 7/5 (7/5), avd = 0.89 (0.83), adf = 1.37 (1.50), flw = 2.68 (3.00), FW/ HW = 0.36 (0.30), ch/o = 0.15 (0.15), prorb = 0.95 (1.00), rcorb = 0.74 (0.67), vb = 0.83 (0.71), dcl = 0.58 (0.56), presctl = 0.49 (0.45), sctl = 2.90 (2.50), sterno = 0.88 (0.73), orbito = 1.65 (1.72), dcp = 0.35 (0.31), sctlp = 1.93 (2.25), C = 1.67 (1.67), 4c = 1.21 (1.09), 4v = 1.75 (1.50), 5x = 1.60 (1.60), ac = 10.89 (12.00), M = 0.59 (0.36), C3F = 0.62 (0.67). Type materials. Holotype ♂ ( SCAU , No. 125729, DNA #2743), CHINA : Menglun , Mengla , Yunnan , 21°47'29''N , 101°22'59''E , alt. 580m , 19.iv.2007 , ex tree trunk, H.W. Chen . Paratype : 1♂ ( SCAU , No. 121114), other data same as holotype. Distribution. China ( Yunnan ). Etymology. From the Latin word " cultellus " (= knife), referring to the knife-liked facial carina.