Paravibrissina pacifica, 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 : 53-54

Paravibrissina pacifica sp. nov.

Figs. 15–18 , 23 , 33–34 .

Recognition. This species resembles P. a d i s c a l i s at a glance, but differs from it in having a densely haired eye and median discal setae on the abdomen.

Description. Male. Head with dense grayish white pollinosity, upper fronto-orbital plate darkened; interfrontal area velvety dark brown; antenna dark brown except weakly reddish at base of 1st flagellomere; palpus reddish yellow. Vertex about 1/6 of head width; interfrontal area widened anteriorly, slightly narrower than fronto-orbital plate at middle; parafacial narrowed below, about as wide as 1st flagellomere at middle height; gena about 2/9 of eye height, with occipital dilation on lower and anterior 1/2; facial ridge rather well bulged. Inner vertical seta about 3/5 as long as eye height; outer vertical seta absent; ocellar seta very fine hair-like; 3 reclinate orbital setae, anterior 2 setae subequal in length and about 2/3 as long as inner vertical seta, posteriormost seta about 2/3 as long as anterior seta; 10–12 frontal setae, lowest seta nearly level with lower margin of pedicel; facial ridge with strong downcurved setae on lower 2/3 and with a row of fine setulae outside row of strong setae; gena with several long setae; occiput with 2–3 rows of fine short black hairs. Antenna falling short of lower margin of face by about 1/2 length of pedicel; 1st flagellomere about 3 times as long as pedicel; arista thickened on basal 1/4. Palpus weakly flattened apically, with dense short setulae on its entire length. Eye with dense long hairs.

Thorax black, with whitish, somewhat grayish, pollinosity, presutural area of scutum with 4 longitudinal black vittae, postsutural scutum with rectangular median black portion and 2 outer black vittae, scutellum black on basal 1/2. Four postsutural dorsocentral setae; 2 katepisternal setae; distance between bases of 2 subapical scutellar setae about 1/2 of that between subapical and basal setae of corresponding side.

Wing pale brownish hyaline; tegula and basicosta black; lower calypter translucent pale brownish. Second costal sector about 4/9 as long as 3rd and 4/5 of 4th; bend of vein M about 2.5 times closer to wing margin than to r-m crossvein.

Legs brownish, tibiae slightly paler on median portion; pulvilli pale brownish. Fore tibia with 2 posterior setae; mid tibia with 1 anterodorsal, 2 posterodorsal and 1 ventral setae; hind tibia with 2 preapical dorsal setae; claws and pulvilli longer than 5th tarsomeres.

Abdomen black in ground color, weakly reddish on sides and venter of 3rd tergum, with dense whitish pollinosity on anterior 1/4 of 3rd tergum, 2/5 of 4th and entire 5th, the pollinosity becoming more sparse and extending to posterior 1/3 on 3rd tergum and with shifting appearance on 4th. Hairs on dorsum short, dense and erect; syntergum 1+2 with 2 strong median marginal setae; 3rd tergum with 2 strong median discal and 2 strong median marginal setae; 4th tergum with 2 strong median discal and a row of strong marginal setae; 5th tergum with 2 discal and a row of marginal setae; venter of 4th and 5th terga each with a pair of hair patches of short and fine hairs on quadrate area of entire length of each tergum. Male terminalia: 5th sternum with broad median cleft, posterior lobe about 1/2 of whole length of the sternum; 6th tergum absent; cerci in dorsal view evenly narrowed posteriorly, separated on apical 1/5, inner wall smooth, in lateral view rather weakly curved dorsally on apical 1/5; surstylus in lateral view weakly curved near middle, about 1.5 times as long as wide, with only a few fine hairs; pregonite bare.

Female. Unknown.

Body length: 7mm.

Holotype. Male, NEW CALEDONIA: Col de Petchecara, 15 km W of Thio, 19.ii. 1978, H. Shima (BPBM).

Distribution. New Caledonia.

Etymology. Specific name is taken from the area of the locality of this species.

Figures

FIGURES 15 – 18. Paravibrissina pacifica sp. nov. 15. Epandrium, cerci and surstylus in dorsal view (hairs omitted). 16. Same in lateral view (hairs on epandrium and cerci omitted). 17. Hypandrium, pregonite, postgonite and aedeagus in lateral view. 18. Male 5 th sternum in ventral view (hairs omitted on left side). Scale bars for Figs. 15 – 17 and 18 = 0.1 mm.

FIGURES 23 – 24. Male 5 th abdominal sternum, 6 th tergum, 6 th sternum and syntergosternum 7 + 8 in posterolateral view. 23. Paravibrissina pacifica sp. nov. 24. P. parvula sp. nov. Scale bars = 0.1 mm.

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.