Dinera chaoi, Zhang & Shima, 2006

Zhang, Chun-Tian & Shima, Hiroshi, 2006, A systematic study of the genus Dinera Robineau-Desvoidy from the Palaearctic and Oriental regions (Diptera: Tachinidae), Zootaxa 1243 (1243), pp. 1-60 : 21-23

Dinera chaoi sp. nov.

Figs. 15–18

Diagnosis

Medium­sized species; abdomen broadly reddish yellow with a black median vitta, 3+4 dc, costal spine absent, abdominal syntergite 1+2 excavated back to posterior margin, no discal setae on the intermediate abdominal tergites.

Body length 14.0 mm.

Description

Male. Head brownish in ground color, face and parafacial yellowish and gena reddish, with yellowish gray pruinosity; frontal vitta dark brown, lunule reddish yellow; antenna brown, pedicel and basal 1/3 of flagellomere 1 reddish, arista dark brown; palpus reddish brown, pale apically. Vertex about 1/7 head width; frontal vitta about twice as wide as fronto­orbital plate at middle; facial carina high, flattened on anterior surface; parafacial about 3 times as wide as flagellomere 1; gena about 1/2 eye height; lower margin of face protruding forward. Fronto­orbital plate with a row of sparse minute hairs on lower portion; parafacial with several minute setulae on upper portion just below lowest frontal seta; inner vertical seta rather fine, about 1/2 eye height; ocellar seta strong, slightly longer than inner vertical seta; 12–14 inclinate frontal setae; vibrissa inserted above lower margin of face by about length of pedicel; occiput with a row of black hairs behind postocular setae. Antenna falling short of lower margin of face by about 3/4 length of flagellomere 1, the latter about 3 times as long as pedicel; base of antenna nearly level with lower 1/3 of eye height; pedicel with 2 strong setae that are about as long as flagellomere 1; arista including plumosity about twice as wide as flagellomere 1. Prementum about 4 times as long as wide; palpus slender, about as long as antenna.

Thorax black in ground color, with grayish white, somewhat pale yellowish pruinosity; 5 dark brown longitudinal vittae distinct on presutural area of scutum, inner vitta narrow, about as wide as pruinose portion between each vitta, merged with each other on anterior 2/5 of postsutural and median portion extending to just anterior to scutellar suture; outer vitta about 1.5 times as wide as pruinose portion between inner and outer vittae; scutellum with grayish pruinosity, dark brown on basal half. Postpronotal lobe with 5 setae, 3 basal setae arranged in triangle; 1+2 ac; 3+4 dc, 0+3 ia, 4 sa; scutellum with basal seta subequal in length to subapical seta and about twice as long as scutellum, apical seta about 1.5 times as long as scutellum. Wing hyaline, pale brownish along veins; tegula black, basicosta brown; halter brown at base and yellow at apex; lower calypter yellowish. Costal spine absent; base of vein R with 3–4 hairs dorsally and ventrally; relative length of costal sections second, third and fourth approximately as 1.8:2:1; vein M from dm­cu crossvein to its bend about 3 times as long as distance between the bend and wing margin; cell r 4+5 open. Legs black, pulvilli dull yellowish. Fore tibia with 2 p; mid tibia with 1–2 ad, 2–3 p and 1 strong v, if 2 ad present, then upper seta finer; hind tibia with 4–5 irregular sized ad, 3 pd and 3 v.

4+5

Abdomen reddish yellow on side and venter, broad mid dorsal longitudinal portion of syntergite 1+2 to tergite 4 and entire 5 black in ground color, posterolateral portion of tergites 3 and 4 narrowly darkened; dorsum with dense pale yellowish white pruinosity on lateral portion and brownish pruinosity on mid dorsal longitudinal area. Syntergite 1+2 excavated to posterior margin, with 2 fine and rather short median marginal setae; tergite 3 with 2 rather strong median marginal and 1 lateral marginal setae; tergite 4 with a row of marginal setae; tergite 5 with an irregular row of discal and regular row of strong marginal setae; discal setae absent on intermediate tergites. Sternite 5 nearly rectangular, median cleft deep, posterior lobe rather quadrate. Male terminalia. Cerci strongly narrowed on apical half, pointed apically in dorsal view and bent ventrally in lateral view; surstylus wide and rounded at apex; postgonite shorter than basiphallus; distiphallus with membranous apical part about 1.3 times as long as sclerotized basal part, with minute spinules on upper 2/5 portion ventrally; ejaculatory apodeme small.

Female. Unknown.

Type material

Holotype ♂, CHINA, Jingdong Ecological station, 2600 m, Mt. Ailao , Yunnan, 21.viii.1990, S. Lin ( IZCAS) . Paratype 1 male, same data as holotype ( BLKU) .

Etymology

Specific name is dedicated to Prof. Chien­ming Chao, a leading entomologist in China, for his great contribution to tachinid systematics in China.

Remarks

This species resembles D. miranda and D takanoi , but differs from the former in having a darker head and abdomen and wing more distinctly brownish tinged along veins, and from the latter in having weak median marginal setae on the abdominal syntergite 1+2 and lacking distinct discal setae on the intermediate tergites.