Paravibrissina adiscalis 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 : 45-47

Paravibrissina adiscalis Shima

Figs. 1–3 , 25 .

Paravibrissina adiscalis Shima, 1979: 143 .

Paravibrissina adiscalis infuscata Shima, 1979: 145 . Syn. nov.

Paravibrissina thailandica Shima, 1979: 145 .– Dear & Crosskey, 1982: 140. Syn. nov.

Recognition. This species was described from Sarawak, Malaysia, based on male specimens, with a subspecies from the Malay Peninsula. Paravibrissina thailandica from Thailand was described at the same time as P. adiscalis and was treated as a different species mainly on the basis of body color. The two nominal species are here considered conspecific. This species is distinct in having bare eyes and the abdomen lacking median discal setae.

Redescription. Male. Vertex about 1/5 of head width; inner vertical seta about 1/2 as long as eye height; outer vertical seta absent; 2–3 reclinate orbital setae; gena narrow, slightly less than 1/5 of eye height; 5–6 frontal setae; occiput with a row of fine black hairs; antenna with 1st flagellomere 4.5 times as long as pedicel; palpus black, spatulate, about 3/4 as long as 1st flagellomere; eye bare; thoracic dorsum with dense grayish white or pale yellowish brown pollinosity; 3 postsutural dorsocentral setae; 2 katepisternal setae; wing tinged with pale brown basally; fore tibia usually with only 1 posterior seta; mid tibia with or without ventral seta; claws and pulvilli longer than 5th tarsomere; abdomen with rather dense pale yellowish to grayish white pollinosity on anterior 2/3 of 3rd tergum and 3/4 of 4th and 5th terga; abdomen without discal setae; venter of 4th abdominal tergum with a pair of roundish patches of rather dense short and very fine hairs on posterior 2/3 of the tergum. Terminalia: Cerci in dorsal view broad, only weakly narrowed to apex, very narrowly separated on apical 1/4; surstylus broad, rounded dorsally, without distinct hairs.

Female. Differing from male as follows: Vertex about 2/9 of head width; inner vertical seta about 3/5 of eye height in length; 2 subequally long proclinate orbital setae, subequal in length to anterior reclinate orbital seta and slightly shorter than inner vertical seta; 1st flagellomere about 4 times as long as pedicel; thoracic dorsum with dense pale yellowish white pollinosity; fore tibia with 2 posterior setae; mid tibia with a strong ventral seta; claws and pulvilli shorter than 5th tarsomere; female without hair patches on venter of 4th abdominal tergum. Terminalia: 6th tergum divided into 2 small rectangular hemitergites, with several strong setae on posterior margin; 6th spiracle on posterior margin of 6th tergum; 6th sternum rounded anteriorly, with many setae on posterior portion; 7th hemitergites smaller than 6th hemitergites, with a few setae on posterior margin; 7th sternum as long as 6th sternum; 8th tergum of very short and narrow hemitergites, without hairs; 8th sternum very small, triangular in shape; epiproct very weak, without hair.

Body length: 5.5–9mm.

Distribution. China, Thailand, Malaysia (Peninsular Malaysia, Sabah, Sarawak), Philippines (Balabac Is.), Papua New Guinea.

Host. Lepidoptera , Pyralidae : Pagyda salvalis Walker.

Material examined. Holotypes. Male of Paravibrissina adiscalis, Balai Ringgin , 100km N. of Kuching, Sarawak, Malaysia, 22–24.xi.1975, H. Shima ( NSMT); male of P. adiscalis infuscata, Cameron Highlands, 1300m , Malaysia, 27.x.1975, H. Shima ( NSMT); male of P. thailandica, Sai Yok , 500m, Kanchana Buri, Thailand, 27–29.xii.1975, W. Tumrasvin ( NSMT).

Paratypes. Male of P. adiscalis , same data as holotype; paratype male of P. a. infuscata , same data as holotype; paratype male of P. thailandica , same locality as holotype, 9–13.xii.1975, S. Shinonaga (all paratypes in BLKU).

CHINA: 2 females, Menglun, 500–700m, Xishuangbanna, Yunnan, 6–9.viii.1990, H. Shima; 1 female, Dazhai, 1200m, Jiangchen, Simao, Yunnan, 12.iii.1995, T. Saigusa ( BLKU); MALAYSIA: 3 females, Nature trail, 150m, Danum Valley, Sabah, 21.ii.2005, Malaise trap, T. Tachi; 19 males, 1 female, East Trail, 150m, Danum Valley, Sabah, 24–25.ii.2005, 9.ix.2005, 18.xii.2006, T. Tachi; 2 females, Trail 5, 800m, Ulu Kimanis, Crocker Range, Sabah, 30.viii.2002, T. Tachi; 3 males, Inobong, 500m, Crocker Range, Sabah, 5.ii.2004, H. Shima; 2 males, same locality as preceding, 24.ii.2006, T. Tachi; 1 male, same as preceding, 2.vi.2004, T. Tachi ( ITBC, BLKU); PAPUA NEW GUINEA: 2 males, 1 female, Baitabag, Madang Province, 7.viii.2002, ex Pagyda salvalis Walker (Lep., Pyralidae ); 2 males, Mis, Madang Province, 28.x.1999 ( USNM).

Figures

FIGURES 1 – 3. Paravibrissina adiscalis Shima. 1. Epandrium, cerci and surstylus in dorsal view (hairs omitted). 2. Same in lateral view (hairs on epandrium and cerci omitted). 3. Female terminalia in lateral view. Scale bar for Fig. 3 = 0.2 mm. Figs. 1 & 2 after Shima (1979).

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.