Hemyda deqinensis, Wang, Qiang, Zhang, Chuntian & Wang, Xinhua, 2015

Wang, Qiang, Zhang, Chuntian & Wang, Xinhua, 2015, Review of the Hemyda Robineau-Desvoidy of China (Diptera: Tachinidae), Zootaxa 4040 (2), pp. 129-148 : 132-133

Hemyda deqinensis sp. nov.

( Figs. 1−12 , 61−64 )

Diagnosis. Medium-sized fly with orange-yellow abdomen. Eye kidney-shaped, hind margin slightly indented; vertex 0.26−0.28 of head width; vibrissa 0.50−0.60 times as long as eye height; 1−2 presutural acrostichal setae; mid tibia with 1 anterodorsal and 1 fine posterodorsal setae, ventral seta absent; abdominal tergite 3 with 2 lateral marginal setae, without lateral discal setae.

Description. Body length: 7.0− 7.5 mm.

Male ( Figs. 1−5 , 61−64 ). Head ( Figs. 3−4 ) black in ground color, dark brown or black on parafacial, frontoorbital plate and frontal vitta, reddish brown to dark brown on gena and genal dilation, and pale yellow on face; dense golden-yellow pruinosity on fronto-orbital plate and upper half of parafacial, dense grayish-white or silvery pruinosity on lower half of parafacial, face, genal dilation, gena and occiput; antenna and palpus black. Eye kidneyshaped in lateral view, hind margin slightly indented; vertex 0.26−0.28 of head width; frontal vitta 3.2−3.5 times as wide as fronto-orbital plate at middle; parafacial 0.70−0.90 times as wide as 1st flagellomere at mid width; face weakly concave, lower margin slightly produced forward; gena 0.10−0.12 times as high as eye height. Ocellar triangle occupying at most posterior 1/3 of frontal vitta. Inner vertical seta strong, 0.45−0.48 times as long as eye height; outer vertical seta fine or indistinguishable from upper occipital setae; ocellar setae fine, 0.74−0.77 times as long as inner vertical seta; ocellar triangle with 4 fine black setulae; 4−6 fine postocellar setae with apices bent forward, 0.65−0.70 times as long as inner vertical seta; 10−14 strong frontal setae, lowest seta slightly below the level of base of pedicel; fronto-orbital plate with a row of fine black setulae on inner margin, and several fine black setulae among frontal setae; vibrissa inserted above level of lower margin of face, 0.50−0.60 times as long as eye height; facial ridge with 1−2 short setulae just above vibrissa and 4−5 subvibrissal setae. Antenna: 1st flagellomere 2.0−2.4 times as long as wide and 2.1−2.5 times as long as pedicel; pedicel bearing black setulae and a long seta, the latter 2.0−2.2 times as long as pedicel; arista bare, 1st aristomere shorter than wide, 2nd aristomere 1.0−1.2 times as long as wide, 3rd thickened on approximately basal 2/5. Palpus nearly cylindrical, only weakly widened near apex, nearly as long as pedicel and 1st flagellomere combined.

Thorax black in ground color, with grayish pruinosity on postpronotal lobe, notopleural region, narrow posterior portion of presutural area and intra-alar region of postsutural scutum; pleura broadly with silvery-grayish pruinosity; dorsum with 2 narrow inner and 2 broad outer dark longitudinal vittae, the latter 4−5 times as wide as inner vitta and slightly broader than pruinose portion between inner and outer vittae. All thoracic setulae black, erect and fine; 1−2 presutural acrostichal setae; 3 presutural dorsocentral setae; 2 supra-alar setae, anterior one shorter than anterior intra-alar and notopleural setae; scutellum black, strong apical setae crossed and horizontal, 1.6−1.8 times as long as scutellum; basal and subapical setae subequal in length and 2.0−2.2 times as long as scutellum. Wing ( Fig. 5 ) hyaline; tegula black; basicosta yellow to light brown; lower calypter translucent pale yellow. Costal seta not differentiated; costa with setulae ventrally from base to apex of 3rd costal sector; vein R4+5 with 3−4 fine setulae at base, dorsally and ventrally; vein M, from crossvein dm-cu to its bend, 1.4−1.5 times as long as distance between the bend and wing margin. Legs black, claws dark brown, pulvilli pale yellowish-brown. All leg setulae black; fore tibia with 0−1 very fine posterior seta; mid tibia with 1 anterodorsal and 1 very fine posterodorsal setae, ventral seta absent; hind tibia with 2 anterodorsal, 2 posterodorsal and 2 anteroventral setae, and 2 preapical dorsal setae.

Abdomen ovate, orange yellow, without pruinosity. Setulae on dorsum black, spinulose and decumbent on tergites 3 and 4, fine and erect on tergites 5 and 6; syntergite 1+2 with 2−4 lateral discal, 2 long median marginal and 2 lateral marginal setae; tergite 3 with 2 long median marginal and 2 lateral marginal setae; tergite 4 with a row of 6−8 marginal setae; tergite 5 with a row of weak marginal setae. Terminalia ( Figs. 61−64 ): Sternite 5 H-shaped, median cleft broadly excavated posteromedially, without a membranous area anterior to cleft, with fine setulae posteriorly; epandrium narrow and small in caudal view, with fine setulae, lateral margin short; cerci short and slender in caudal view, with fine short setulae on inner lateral margin, dorsally broadly separated except for fused apex; surstylus short, strongly expanded posteriorly in lateral view, with fine, short setulae posteriorly; hypandrium broad in lateral view, hypandrial arm long and sclerotized; pregonite and postgonite fused, broad and long in lateral view, with several short, fine setulae on median lateral margin; ejaculatory apodeme short.

Female ( Figs. 6−12 ). Vertex wide, 0.37−0.38 times head width; frontal vitta 3.0−3.2 times as wide as frontoorbital plate at middle, outer vertical seta undeveloped, hair-like, about as long as postocular setae; 1 outwardly directed prevertical seta, 0.40−0.50 times as long as inner vertical seta; 2 proclinate orbital setae, 0.55−0.60 times as long as inner vertical seta; 7−8 fine frontal setae, several black setulae among frontal setae; 1st flagellomere 2.2−2.4 times as long as pedicel. Fore tibia with 2 fine posterior setae; mid tibia with 2 anterodorsal, 2 posterodorsal and 1 ventral setae; claws and pulvilli shorter than 5th tarsomere; syntergite 1+2 with 2 long median marginal setae, lateral marginal seta absent. Terminalia ( Figs. 11−12 ): Syntergite 6+7 longer than tergite 5, with long, strong and erect setulae, ventral portion of tergite 6 with a bifid protrusion subapically, triangular in lateral view; tergite 7 divided into two broad lobes laterally, bent anteriorly; sternite 7 short; tergite 8 narrow, divided into two lobes on posterior portion, with fine short setulae, rounded at apex; sternite 8 long, forming a piercer.

Material examined. Holotype ♂: Yunling, 2600−2900 m, Deqin, Yunnan, China, 27−31.v.2012, leg. Q. Wang (NKU). Paratypes: 9 ♂♂, 1 ♀, same data as holotype (NKU).

Etymology. The specific epithet is based on the type locality of Deqin, a special place in NW Yunnan, China.

Remarks. Hemyda deqinensis sp. nov. is one of four species in the genus with a long vibrissa, 0.50−0.60 times as long as eye height, the other three being H. dominikae , H. hertingi and H. vittata . Within this group, H. deqinensis and H. dominikae resemble each other by having a predominantly yellow or orange-yellow abdomen and a protrusion on tergite 6 in the female ( Figs. 6−7 , 18−19 ). Hemyda deqinensis differs from H. dominikae by its small size (7.0− 7.5 mm), the entirely yellow or orange-yellow abdominal tergites of the male, the female abdominal syntergite 1+2 lacking lateral marginal setae, and tergite 3 with 2 median marginal and 2 lateral marginal setae.

Distribution. China (Yunnan).

Figures

FIGURES 1 − 5. Hemyda deqinensis sp. nov., holotype ♂ (China, Yunnan, Deqin, Yunling, 2600 − 2900 m, 27 − 31. v. 2012, Q. Wang). 1. Body in dorsal view. 2. Body in lateral view. 3. Head in anterior view. 4. Head in lateral view. 5. Wing in dorsal view.

FIGURES 6 − 12. Hemyda deqinensis sp. nov., paratype ♀ (China, Yunnan, Deqin, Yunling, 2600 − 2900 m, 27 − 31. v. 2012, Q. Wang). 6. Body in dorsal view. 7. Body in lateral view. 8. Head in anterior view. 9. Head in lateral view. 10. Wing in dorsal view. 11. Terminalia in ventral view. 12. Terminalia in lateral view.

FIGURES 61 − 64. Male terminalia of Hemyda deqinensis sp. nov., paratype (China, Yunnan, Deqin, Yunling, 2600 − 2900 m, 27 − 31. v. 2012, Q. Wang). 61. Epandrium, cerci and surstyli in caudal view. 62. Epandrium, cerci and surstyli in lateral view. 63. Sternite 5 in ventral view. 64. Aedeagal apodeme, ejaculatory apodeme, hypandrium, pregonite, postgonite, basiphallus and distiphallus in lateral view. Scale bars = 0. 25 mm.

FIGURES 18 − 24. Hemyda dominikae Draber-Mońko, ♀ (Liaoning, Benxi, Water Cave, 300 − 400 m, 12. vi. 2011, C. T. Zhang). 18. Body in dorsal view. 19. Body in lateral view. 20. Head in anterior view. 21. Head in lateral view. 22. Wing in dorsal view. 23. Terminalia in ventral view. 24. Terminalia in lateral view.