Nine new species of the subgenus Stegana (Oxyphortica) from the Oriental region, with morphological and molecular evidence based on Chinese species (Diptera: Drosophilidae) Author Wang, Nannan Author Zhang, Yuan Author Cheng, Yu Author Chen, Hongwei text Journal of Natural History 2017 2017-09-14 51 33 - 34 1943 1970 http://dx.doi.org/10.1080/00222933.2017.1360960 journal article 10.1080/00222933.2017.1360960 1464-5262 5182851 2FA403F6-5535-40A4-9FD0-ADB9913EDE83 Stegana ( Oxyphortica ) triodonta Cheng and Chen , sp. nov. ( Figures 3 (d), 4(h), 6(d) and 16). Diagnosis This species is similar to S. maichouensis in the presence of strong prensisetae on surstylus, but differs from the latter by having the surstylus with one strong, acute process medially and three strong prensisetae apically ( Figure 16 (b)), aedeagus more elongated, with dense pubescence ventrally almost whole length and one pair of apically acute processes dorsally ( Figure 16 (c, d)). Description Clypeus brown. Palpus yellow. Mesoscutum nearly brownish yellow ( Figure 4 (h)). Scutellum brown medially, dark brown along margin, yellow at tip ( Figure 4 (h)). Katepisternum yellow, sometimes slightly brownish above. Wing yellowish, brownish anterodistally ( Figure 3 (d)). Abdominal tergites: 1st yellow; 2nd to 4th yellow medially, black on lateral and posterior margins, with thin brownish medial stripes; 5th and 6th tergites yellow medially, black laterally ( Figure 6 (d)). Male terminalia: Epandrium undeveloped on posterolateral corners, with pubescence and dense setae ( Figure 16 (a)). Cercus lacking pubescence ( Figure 16 (a)). Surstylus with three long setae basally and numerous setae apically ( Figure 16 (b)). Parameres absent ( Figure 16 (c, d)). Gonopods broadened to hood-shaped, elongated basolaterally (this elongation bifurcate) and apically, with one pair of suberect slightly bifurcate processes submedially and one pair of small processes subapically ( Figure 16 (e)). Figure 16. Stegana (Oxyphortica) triodonta Cheng and Chen , sp. nov. , male terminalia. (a) epandrium, cercus and surstylus (lateral view); (b) surstylus (ventral view); (c, d) hypandrium, aedeagus and aedeagal apodeme (ventral and lateral views); (e) gonopods. Scale lines = 0.1 mm. Measurements BL = 2.30 mm in holotype (range in five males , four females paratypes : 2.30–2.70 mm in males, 2.45–2.73 in females); ThL = 1.08 mm ( 1.10–1.40 mm in males, 1.00– 1.47 in females), WL = 2.15 mm ( 1.87–2.23 mm in males, 2.10–2.65 in females); WW = 0.84 mm (0.87–1.00 mm in males, 0.84–1.17 in females), arb = 8/5 (6–8/3–5), avd = 1.00 (0.60–1.00), adf = 2.33 (2.14–3.00), flw = 1.44 (1.55–2.20), FW/HW = 0.39 (0.36– 0.43), ch/o = 0.12 (0.10–0.14), prorb = 1.14 (1.04–1.69), rcorb = 0.64 (0.56–0.76), vb = 0.47 (0.45–0.67), dcl = 0.47 (0.40–0.53), presctl = 0.50 (0.40–0.50), sctl = 1.22 (1.04–1.38), sterno = 0.73 (0.57–0.71), orbito = 1.57 (1.50–2.00), dcp = 0.31 (0.20–0.37), sctlp = 0.93 (0.67–0.91), C = 3.20 (2.47–2.83), 4c = 0.88 (0.81–1.00), 4v = 2.10 (1.67–2.47), 5x = 1.50 (1.40–1.90), ac = 4.38 (4.13–5.00), M = 0.53 (0.57–0.70), C3F = 1.00 (0.84–0.90). Type specimens Holotype male ( SCAU , No. 121 059), China : Mengyang , Jinghong , Yunnan , 22°5′N , 100° 53′E , altitude 700 m , 14 September 2002 , ex tree trunk, HW Chen . Paratypes : China : two females ( SCAU , Nos. 121 060, 61), same data as holotype; two males , two females ( SCAU , Nos. 121 062–65), Muyiji Park , Ximeng , Yunnan , altitude 1100 m , 2–4 April 2011 , ex tussock, JJ Lu , ZF Shao , YR Su , SJ Yan ; four males (two in KIZ , Nos. 0088155, 56; two males in SCAU , Nos. 124 818, 33), Dashuigou , Lvchun , Yunnan , 22°57′19 ʹ ’N, 101°57′4 ʹ ’E, altitude 1310 m , 2 August 2016 , ex tree trunks and tussock, HW Chen , L Gong , YQ Liu . Etymology A combination of the Greek words ‘ tri -’ (= three) + ‘ odontos ’ (= tooth), referring to the surstylus with three prensisetae apically. Distribution China ( Yunnan ).