Dexia tenuiforceps Zhang et Shima 2010, sp. nov.
Creators: name: Zhang, Chun-Tian
name: Shima, Hiroshi
name: Chen, Xiao-Lin
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tachinidae
Dexia
Dexia tenuiforceps

description: Dexia tenuiforceps Zhang et Shima, sp. nov.   
Figs. 81−84  
 Diagnosis. Prementum 5−6 times as long as wide; 3 katepisternal setae; tegula mostly black except reddish brown base; legs reddish yellow; abdominal syntergite 1+2 with 1 pair of median marginal setae; and surstylus narrow and bent.   
 Description. Body length. 10.0−15.0 mm.   
 Male. Head with yellowish gray pruinosity, frontal vitta brownish black, lunule brown; antennae and palpi reddish yellow. Frons 1/6−1/7 as wide as head width; fronto-orbital plate slightly wider than or subequal in width to frontal vitta at middle; parafacial 2.5−3 times as wide as 1st flagellomere; facial carina developed, ridge arched in lateral view, widened below; lower margin of face protruding forward; gena about 3/7 as wide as eye height. Inner vertical seta 0.27−0.4 times as long as eye height, about twice as long as fine, hair-like, outer vertical seta; ocellar seta as strong as upper frontal setae; 12−13 inclinate frontal setae; vibrissa inserted above lower margin of face. Antenna falling short of lower margin of face by 0.6−0.7 times length of 1st flagellomere, latter about 4 times as long as pedicel; total width of arista including plumosity about 4 times as wide as 1st flagellomere. Prementum 5−6 times as long as wide; palpus slightly longer than antenna.   
 Thorax black in ground color, with grayish yellow pruinosity, 4 longitudinal black vittae on presutural area of scutum and 5 on postsutural scutum, an inner vitta 0.4−0.5 times as wide as pruinose portion between inner and outer vittae on presutural area. All thoracic hairs black; prosternum bare, twice as long as wide; proepisternum bare; 1−2 presutural and 2 postsutural acrostichal setae; 3 presutural and 3 postsutural dorsocentral setae; 2 postsutural intra-alar setae; 3 supra-alar setae, anterior seta about 1/2 as long as posterior two; 3 katepisternal setae. Wing brownish hyaline; basicosta black; tegula mostly black except reddish brown base; lower calypter yellowish, with short fringe on outer margin. Costal spine distinct, about as long as r-m crossvein; relative lengths of 2nd, 3rd and 4th costal sectors approximately 1:2:1; vein M from dm-cu crossvein to its bend 2.5−3.3 times distance between the bend and wing margin, appendix very short. Legs reddish yellow except for dark brown tarsi and brown ventrodistal portions of femora. Mid tibia with 2 posterodorsal setae; hind tibia with 1−3 anterodorsal, 2−3 posterodorsal and 2 ventral setae. Fore claw and pulvillus slightly longer than, or subequal in length to, tarsomere 5.   
 Abdomen long ovate, translucent yellow, black on mid-dorsal longitudinal areas and on posterior 1/4−1/5 of tergites 4 and 5, black marking on bases of lateral marginal setae of each tergites; grayish white pruinosity on narrow anterior margin of tergites 3, anterior 1/4−4/5 of tergite 4 and entire tergite 5. Syntergite 1+2 with 2 median marginal and 1 lateral marginal setae; tergite 3 with 1−2 pairs of median discal, 1 pair of median marginal and 1 lateral marginal setae; tergite 4 with 1−2 pairs of discal and a row of marginal setae; tergite 5 with a row of discal and marginal setae. Male terminalia. Sternite 5 subsquare, V-shapedmedian cleft about 3/5 length of the sternite, posterior lobe wide and blunt apically; cerci slender on apical half and pointed apically; surstylus narrow and slender, pointed apically; postgonite shorter than basiphallus.   
 Female. Frons 0.28−0.33 times as wide as head width; frontal vitta slightly narrower than fronto-orbital plate at middle; 1st flagellomere about 5 times as long as pedicel. Tegula and basicosta brown to dark brown. Legs wholly yellow; claws and pulvilli short. Abdomen ovate; reddish yellow; tergites 4 and anterior half of tergite 5 black, with gray pruinosity; abdominal syntergite 1+2 without median marginal setae, tergites 3 and 4 without discal setae. Other characters almost same as in male.   
 Type material. Holotype male, CHINA. Yongsheng, Liude, 2300 m, Yunnan, 10.vii.1984, R. Wang (IZCAS). Paratypes. CHINA. Fujian (= Fukien): 1 male, Shaowu, Taohulan, 1000 m, 14−18.vii.1946, T. Maa. 2 males, Chungan, Kuatun, 22−25.viii.1945, T.C. Maa (BPBM). Sichuan (= Szechuen): 1 male, Emei Shan, Xixiangchi, 1800−2100 m, 28.viii.1957, K.-R. Huang. 1 male, 1 female, Moxi, 1500−2400 m, Luding, 15- 18.ix.1982, X.-Z. Zhang (IZCAS). 1 male, 1 female, Mt. Omei [= Emei Shan], 4000−7 000 ft, 16−22.viii.1934, D.C. Graham (USNM). 4 males, Hongkou, Dujiangyan, Chengdu, 12–13.viii.2009, C.-T. Zhang, C. Fu, Z. Zhao (SNU). Yunnan: 1 male, Xishan, 2100 m, Kunming, 17.viii.1996, H. Shima. 1 female, Dagaoping, 1900−2400 m, Baoshan, 7−9.ix.1996, H. Shima. 2 females, Laowo, 2000−2400 m, Nujiang, 4−5.iv.1996, H. Shima (BLKU). 28 males, 1 female, Wuliang Shan, 2800 m, Jingdong, Simao, 8−9.vi.2010, C. FU & Y.-Y. Zhou. 7 males, 1 female, Cang Shan, 2700 m, Dali, 11.vi.2010, C. FU & Y.-Y. Zhou. 1 male, Gaoligong Shan, 2400 m, Pianma, Lushui, 22.vi.2010, Y.-Y. Zhou. 2 females, Xi Shan, 1950-2350 m, Kunming, 27.vii.2010, C.-T. Zhang, Q. Wang. 1 female, Gaoligong Shan, 2400 m, Xujiaping, Lushui, 14.viii.2010, Q. Wang (SNU). Xizang: 1 male, Médog, 17.viii.1977, G.-T. Jin. Zhejiang: 7 males, Baishanzu, 1080−1200 m, Qingyuan, 23−26.vii.1963, G.-T. Jin (SEMC). Taiwan: 1 male, Taihezan, 1960, Baranov (USNM). NEPAL. 6 males, 2 females, Basantapur, 2300 m, E. Nepal, 25−26.vii.1972, H. Shima. 1 male, Ramaechap Dist. Jiri, 1950 m, 24.vii.1992, H. Kurahashi. 1 female, Solukhumbu, Bandar-Sete, 2150−2575 m, 26.vii.1992, H. Shima (BLKU). 1 male, Ktmd. [= Kathmandu], Pulchauki, 6600 ft, viii.1967, Malaise trap (CNC).   
 Etymology. The specific epithet is taked from a diagnostic character of this species, the narrow surstylus.   
 Distribution. China (Fujian, Sichuan, Taiwan, Yunnan, Zhejiang), Nepal.   
 Remarks. This species is similar to D. fraseri, but differs from it by 1st flagellomere and prementum longer, basicosta dark, and wing brownish hyaline, not strongly tinged brown along veins and anterior portion.
description: Published as part of Zhang, Chun-Tian, Shima, Hiroshi & Chen, Xiao-Lin, 2010, A review of the genus Dexia Meigen in the Palearctic and Oriental Regions (Diptera: Tachinidae) 2705, pp. 1-81 in Zootaxa 2705 on pages 66-68