Dinera guangxiensis, Zhang, Chun-Tian & Fu, Chao, 2012

Zhang, Chun-Tian & Fu, Chao, 2012, Three new species of Dinera Robineau-Desvoidy from China (Diptera: Tachinidae), Zootaxa 3275, pp. 20-28 : 23-25

Dinera guangxiensis sp. nov.

( Figs. 3–4 , 12–16 )

Diagnosis. Antenna reddish brown except apical 4/5 of flagellomere 1 black, thorax with longitudinal black inner vittae merged on postsutural scutum; abdominal tergites 3 and 4 each with a black trapezoidal marking on apical 4/ 5, and without discal setae.

Description. Body length about 12.0–15.0 mm.

Male. Head black in ground color, gena reddish brown, with grayish white pruinosity; frontal vitta dark brown; lunula brown; flagellomere 1 black on apical 4/5, its basal 1/5 and pedicel and scape reddish brown and arista dark brown to reddish brown; palpus reddish yellow. Frons at narrowest point 0.1–0.11 of head width; frontal vitta widened anteriorly, 1–1.5 times as wide as fronto-orbital plate at middle; parafacial about twice as wide as flagellomere 1 in profile; genal height about 0.4 times as high as eye height; facial carina high and arched in lateral view. Fronto-orbital plate and parafacial bare; 15 to 16 inclinate frontal setae, the strongest one about as long as inner vertical seta; inner vertical seta 0.4–0.5 times as long as eye height; outer vertical seta absent; ocellar seta and postocellar seta strong, ocellar seta 1.2–1.3 times as long as inner vertical seta. Flagellomere 1 3–4 times as long as wide, 2–2.5 times as long as pedicel; pedicel with two long setae, lower one slightly longer and about as long as antenna; antenna falling short of lower margin of face by 0.8–1.0 length of flagellomere 1; arista including plumosity 2.0–2.2 times as wide as flagellomere 1; palpus about 7/9 as long as vibrissa; prementum 5–6 times as long as wide.

Thorax black in ground color, with grayish white pruinosity; scutum with 5 black longitudinal vittae, outer vitta about as wide as pruinose portion between inner and outer vittae on presutural area, inner vittae extending to posterior half of postsutural scutum and merged; scutellum black, with grayish white pruinosity on outer margin; pleura black, with grayish white pruinosity. Prosternum 1.5–2.0 times as long as wide; 4 postpronotal setae, 3 basal setae arranged in a triangle, 2 presutural and 2–3 postsutural acrostichal setae; 3 presutural and 4 postsutural dorsocentral setae; 2–3 postsutural intra-alar setae; 3 supra-alar setae, prealar seta about 0.5 times as long as the first intra-alar seta; 3 katepisternal setae; 1 anepimeral seta thin, extending to posterior margin of upper calypter; apical scutellar seta about 1.5 times as long as scutellum, shorter than subapical scutellar seta; 2–4 discal scutellar setae. Wing hyaline, slightly tinged with pale brownish; tegula black; basicosta reddish yellow on basal half and dark on apex; lower calypter pale yellowish white; halter reddish yellow. Costal spine indistinct; base of vein R4+5 with 3–4 fine hairs on dorsal and ventral surfaces; relative length of costal sections 2nd, 3rd and 4th approximately as 4:6:3; vein M from dm-cu crossvein to its bend about 3 times distance between the bend and wing margin. Legs black; pulvilli pale brown. Fore tarsi distinctly longer than head height; fore claws and pulvilli longer than 5th tarsomere; fore tibia with a row of short anterodorsal setae on basal 3/5 and 2 posterior setae; mid tibia with 1–2 anterodorsal and 2–3 posterior setae, usually without, sometimes with a short ventral seta; hind tibia with 3–4 anterodorsal, 3–4 posterodorsal and 1–2 ventral setae.

Abdomen ovate, black in ground color, with grayish white pruinosity on entire dorsum; tergites 3 and 4 each with a black trapezoidal marking on apical 4/5; recumbent seta-like black hairs on tergites. Syntergite 1+2 almost excavated to posterior margin, with 1 pair of median marginal and 1–2 pairs of lateral marginal setae; tergite 3 with 1 pair of median marginal and 2–3 pairs of lateral marginal setae, without discal setae; tergite 4 with a row of strong marginal setae, without discal setae; tergite 5 with a row of strong marginal setae and some irregularly set discal setae. Sternite 5 quadrangular, posterior lobe weakly pointed at apex in ventral view, V-shaped median cleft deep and wide. Male terminalia. Cerci short, wide at base and narrowed to apex on distal half in caudal view; surstylus wide and rounded apically; surstylus longer than cerci in lateral view, pregonite flat and curved ventrally; postgonite shorter than basiphallus; distiphallus long, sclerotized basal part slightly shorter than membranous apical part.

Female. Vertex about 2/5 head width; outer vertical seta about 0.6 times as long as inner vertical seta, 2 proclinate orbital setae, and 1 reclinate upper orbital seta; genal height 0.5–0.6 times as long as eye height; claws and pulvilli shorter than 5th tarsomere; mid tibia with 1 strong ventral seta; abdomen wide ovate.

Type material. Holotype 3, CHINA, Guangxi: Dayaoshan Mountain (24°10ʹN 110°23ʹE), 630–1200 m, Jinxiu, 13–18.v.2011, Q. Wang. Paratypes. CHINA: 6 males, 2 females, same locality and date as holotype, C.-T. Zhang, C. Fu, Q. Wang ( SYNU).

Etymology. Specific epithet is named for the province of the type locality, Guangxi.

Distribution. China (Guangxi).

Remarks. This species is very similar to D. takanoi (Mesnil) , but differs from the latter in having long and dark brown flagellomere 1 except base brown, flagellomere 1 3–4 times as long as wide, palpus distinctly longer than antenna, abdomen dark brown, tergite 4 without discal seta.

Figures

FIGURES 1 – 6. Male in dorsal and lateral view. 1 – 2. Dinera borealis sp. nov. 3 – 4. Dinera guangxiensis sp. nov. 5 – 6. Dinera nigrisquama sp. nov.

FIGURES 12 – 16. Dinera guangxiensis sp. nov. 12. Head of male in lateral view. 13 – 14. Epandrium, cerci and surstyli in caudal and lateral views. 15. Aedeagal apodeme, ejaculatory apodeme, hypandrium, pregonite, postgonite, basiphallus and distiphallus in lateral view. 16. Sternite 5. Scale bars = 0.25 mm.