Paravibrissina Shima

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 : 44-45

Paravibrissina Shima

Paravibrissina Shima, 1979: 142 . Type species: Paravibrissina adiscali s Shima, 1979, by original designation.

Diagnosis. A genus of the subfamily Exoristinae : Head dichoptic, semicircular in profile; eyes large; ocellar seta absent or minute; facial ridge with strong downcurved setae; proepisternum bare; 1st postsutural supraalar seta (pre-alar seta) shorter than 1st postsutural intra-alar seta and notopleural seta; scutellum with apical setae fine or absent, subapical scutellar setae close to each other; wing with cell R4+5 open, bend of vein M forming an obtuse angle; male abdomen with patches of very short and fine hairs on underside of 4th and/or 5th terga.

Generic description. Head dichoptic; inner vertical setae strong, parallel to each other; ocellar seta absent or very fine and hair-like; 2–3 reclinate orbital setae; parafacial bare; facial ridge with strong downcurved setae on lower 3/5 or more; occiput flattened; vibrissa nearly level with lower margin of face; 1st flagellomere more than 4 times as long as pedicel; arista bare or very short pubescent, thickened at most on basal 1/3, 2nd aristomere at most as long as wide; prementum short, palpus shorter than 1st flagellomere.

Prosternum with several strong hairs on each side; proepisternum bare; postpronotal lobe with 4 setae, anterior seta fine, 3 basal setae standing nearly in a straight line or middle seta slightly set forward; 3 pre- and 3 postsutural acrostichal setae; 3 pre- and 3 or 4 postsutural dorsocentral setae; 1 pre- and 3 postsutural intraalar setae; 3 postsutural supra-alar setae, 1st seta (pre-alar) distinctly shorter than 1st postsutural intra-alar seta and notopleural seta; 2 or 3 katepisternal setae; katepimeral seta strong; anatergite bare; postcoxal bridge open; basal and subapical scutellar setae strong, apical scutellar seta fine or absent, 2 rather short lateral scutellar setae, 2 subapical scutellar setae close to each other, distance between bases of them usually much less than that between basal and subapical setae of corresponding side.

Wing without costal spine; costa bare below beyond attachment of subcosta; vein R4+5 with 2–3 setulae at base; vein M curved at obtuse angle, its bend closer to wing margin than to dm-cu crossvein; cell R4+5 open; dm-cu crossvein weakly sinuate, at most 1.5 times as long as last section of vein CuA1; vein A1+CuA2 not reaching wing margin.

Fore coxa bare on anteroventral surface; hind coxa bare on posterodorsal margin; fore tibia with 1–2 posterior setae; mid tibia with or without ventral seta; hind tibia without posteroventral apical seta.

Abdominal syntergum 1+2 excavated to its posterior margin; male 4th and/or 5th abdominal terga with a patch of dense short fine hairs ventrolaterally. Male terminalia: 6th sternum short, fused with syntergosternum 7+8 on upper margin of right side; dorsal arms of hypandrium fused medially and encircling base of aedeagus; cerci narrowly separated on apical portion; surstylus broad; epiphallus absent. Female terminalia: 6th tergum divided into 2 hemitergites; 6th sternum broad, posterior margin simple; 7th tergum separated into 2 small hemitergites; 7th sternum as long as 6th sternum, posterior margin nearly straight; 8th tergum of very small hemitergites; cerci short, rounded apically.

Egg: Microtype: Ellipsoid in form, with thick marginal ring, at most 0.2mm long and 0.1mm wide.

First instar larva: Small, about 0.2mm long; mouth hook long and narrow, apex sharply pointed, dorsal cornu extending to posterior margin of third thoracic segment; 1st to 3rd thoracic segments each with rows of hook-like spinules.