Paravibrissina aurigera, Shima, Hiroshi & Tachi, Takuji, 2008

Shima, Hiroshi & Tachi, Takuji, 2008, New species of the genus Paravibrissina Shima (Diptera: Tachinidae) from Southeast Asia and South Pacific, Zootaxa 1870, pp. 43-60 : 49-50

Paravibrissina aurigera sp. nov.

Figs. 9 , 27 , 31–32 .

Recognition. This species is distinct in lacking a row of black setulae on the occiput. The female terminalia resemble those of S. adiscalis in having a very short 8th abdominal tergum. Eggs bear distinct reticulation on the chorion surface.

Description. Female. Head with dense yellow pollinosity, occiput yellowish white; antenna mainly dark brown to black, with pedicel weakly reddish brown and base of 1st flagellomere narrowly reddish yellow; palpus reddish brown, darkened on apical 1/2. Vertex about 2/9 of head width; interfrontal area only slightly widened anteriorly, about 1/3 as wide as fronto-orbital plate at middle; parafacial well narrowed below, about as wide as 1st flagellomere at middle height; gena about 1/5 of eye height, with occipital dilation on its lower and anterior 1/3; facial ridge only weakly bulged. Inner vertical seta about 3/5 as long as eye height; outer vertical seta absent; ocellar seta absent; 2 reclinate orbital setae, anterior seta slightly longer than posterior one and about 2/3 as long as inner vertical seta; 2 proclinate orbital setae subequal in length to each other and to inner vertical seta; 5 frontal setae, lowest seta nearly level with base of arista; fronto-orbital plate with only several fine and short hairs; facial ridge with strong downcurved setae on lower 3/5; gena with several fine short hairs; upper occiput with only 1–2 fine black hairs. Antenna falling only slightly short of lower margin of face; 1st flagellomere about 3.5 times as long as pedicel; arista thickened on basal 1/3. Palpus about 2/3 as long as pedicel and 1st flagellomere combined. Eye with dense long hairs.

Thorax with dense yellow pollinosity, dorsum with 4 rather broad longitudinal black vittae; scutellum with golden yellow pollinosity. Middle seta of 3 basal postpronotal setae slightly set forward; 3 postsutural dorsocentral setae; 2 katepisternal setae; apical scutellar setae fine and parallel to each other; distance between bases of two subapical scutellar setae slightly less than that between bases of basal and subapical setae of corresponding side; 2 lateral scutellar setae, only slightly shorter than subapical seta.

Wing hyaline, well tinged with pale yellowish brown basally; tegula black, basicosta reddish yellow; lower calypter pale yellowish brown. Second costal sector about 1/2 as long as 3rd and subequal in length to 4th; bend of vein M about 3 times closer to wing margin than to r-m crossvein.

Legs blackish brown; pulvilli pale brownish. Fore tibia with 2 posterior setae; mid tibia with 2 anterodorsal, 2 posterodorsal and 1 ventral setae; hind tibia with 3 preapical dorsal setae, anterodorsal one short and fine; claws and pulvilli shorter than 5th tarsomeres.

Abdomen dark brown in ground color, with dense yellowish pollinosity on entire dorsum except syntergum 1+2, the pollinosity shifting in appearance with direction of light; venter with thin yellowish white pollinosity. Hairs on dorsum rather dense short fine and suberect, stronger on mid dorsal area, on venter fine and longer; syntergum 1+2 with 2 median marginal setae; 3rd tergum with 2 median discal and 2 strong median marginal setae; 4th tergum with 2 median discal and a row of strong marginal setae; 5th tergum with 2 discal and a row of marginal setae. Female terminalia: 6th tergum of small square hemitergites, with a few long and strong hairs on posterior portion; 7th tergum of small elongate hemitergites, with 2 long hairs marginally; 8th tergum very short, broadly divided dorsally and fused with each other on ventral portion; epiproct absent.

Male. Unknown.

Body length. 6.8mm.

Holotype. Female, 25km NW of Rougainville, Espirito Santo Is., New Hebrides [ Vanuatu], 8–11.ii.1978, H. Shima (BPBM).

Distribution. Vanuatu.

Etymology. Specific name is taken from the bright yellow body color.

Figures

FIGURE 9. Paravibrissina aurigera sp. nov. Female terminalia. Scale bar = 0.2 mm.

FIGURES 25 – 28. Eggs and 1 st instar larva. 25. Paravibrissina adiscalis Shima (left below, anterior portion of 1 st instar larva; right below, part of marginal ring). 26. P. argentifera sp. nov. (chorion somewhat deformed and marginal ring removed with treatment of KOH solution). 27. P. aurigera sp. nov. 28. P. leucogaster sp. nov.

FIGURES 29 – 34. 29. Paravibrissina argentifera sp. nov., male, dorsal view. 30. P. leucogaster sp. nov., male, dorsal view. 31. P. aurigera sp. nov., female, dorsal view. 32. Same, lateral view of head. 33. P. pacifica sp. nov., male, dorsal view. 34. Same, lateral view of head.