Austrophasiopsis formosensis Townsend

Shima, Hiroshi & Tachi, Takuji, 2022, A new species of Austrophasiopsis Townsend (Diptera: Tachinidae) from Nepal with systematic notes on the genus, Zootaxa 5190 (4), pp. 555-564 : 559-561

Austrophasiopsis formosensis Townsend

( Figs. 6–10 , 13–17 )

Austrophasiopsis formosensis Townsend, 1933: 448 . Holotype female (DEI, examined). Type locality: Taiwan, Kaoshung Hsien , Chiah Hsiang [as Kosempo].

Kosempomyiella rufiventris Baranov, 1934: 165 . Lectotype male by designation of Sabrosky & Crosskey, 1969: 46 (DEI, examined). Type locality: Taiwan.

Kosempomyiella rufiventris: Crosskey, 1967: 16 (as syn. of A. formosensis, Oriento-Australasian tachinid genera); Sabrosky & Crosskey, 1969: 46 (type material described by Baranov).

Austrophasiopsis formosensis: Verbeke, 1962: 135 (relationships); Crosskey, 1976: 195 (conspectus of Oriental tachinids); Crosskey, 1977: 622 (catalog of Oriental tachinids); O’Hara et al., 2009: 156 (catalog of Chinese tachinids).

Kosempomyia sauteri Baranov, 1934: 165 . Nomen nudum (cited in synonymy as a manuscript name).

Type material examined. Holotype ♀ of Austrophasiopsis formosensis: Kosempo / Formosa / H. Sauter V.12 . Paratypes of Austrophasiopsis formosensis : 4 ♀♀, same data as holotype ( DEI) . Lectotype ♂ of Kosempomyiella rufiventris , Formosa I, / Sauter. R . Paralectotype ♀ of K. rufiventris: Kosempo , Formosa, V .12 ( DEI).

Additional material examined. Taiwan: 5 ♂♂, 7 ♀♀, Taichung, Huanshan, Chichiawanchi , 6.ix.1985, K. Kanmiya ; 4 ♂♂, Nantou, Puri, Rushan , 26.iii.1981, M. Iwasa ; 11 ♂♂, Fenchifu, 1–3.vi.1970, 31.vi.1970, H. Kurahashi & K. Nishida ( BLKU, KUM).

Diagnosis. Small roundish species, with contrasting dark brownish thorax and reddish yellow abdomen; head very narrow at vertex in male, 0.06–0.07 of head width in male, and 0.28–0.30 in female; parafacial bare; 4 postsutural dorsocentral setae; legs brown, basal 1/2–2/3 of hind femora reddish yellow in male, sometimes basal portion and almost entire hind femur reddish in female; female 4th and 5th tarsomeres of foreleg weakly dilated and flattened.

Redescription. Body length. 4.5–5.8 mm.

Male. Frons narrow, at the narrowest point 0.06–0.07 of head width; frontal vitta very narrowed at anterior 3/5, about as wide as anterior ocellus; fronto-orbital plate and parafacial with grayish white pruinosity; inner and outer vertical setae indistinguishable; ocellar setae very fine, but distinct, about as long as longest frontal seta; 9–11 frontal setae, lowest seta nearly level with base of lunula; fronto-orbital plate with only several fine hairs outside row of frontal setae; parafacial about 5/8 as wide as postpedicel at mid height; gena 0.19–0.21 of eye height; antenna with postpedicel 1.8–2.0 times as long as pedicel; petiole of vein R 4+5 subequal in length to dm-cu crossvein; tarsi not dilated, claws and pulvillus subequal in length to 5th tarsomeres. Thorax black in ground color; dorsum thinly covered with pale grayish white pruinosity, pruinosity on median longitudinal portion of presutural scutum and postpronotal lobe distinct, pleura with thin grayish white pruinosity; thoracic setae weak and sometimes indistinct among thoracic hairs, 1 presutural and 2 postsutural acrostichal setae; 2 presutural and 4 postsutural dorsocentral setae; 2 supra-alar setae; 2 katepisternal setae. Abdomen reddish yellow, except brownish 5th tergite, without pruinosity; abdominal dorsum with rather fine short suberect hairs, 3rd tergite with a pair of median marginal setae about 1/3 as long as 4th tergite; 4th tergite with a row of rather long marginal setae; 5th tergite with many long hairs, discal and marginal setae indistinguishable. Male terminalia: Cerci in dorsal view weakly narrowed from basal 1/3 to apex, apex rather rounded, without mid dorsal longitudinal suture, in lateral view broad at base and curved ventrally to basal 1/3, then only weakly curved ventrally along apical 1/6, apex weakly pointed; surstylus without hair, nearly parallel-sided from base to apical 1/3, then well narrowed to pointed apex; hypandrial arms rather short, fused with each other dorsally; pregonite broad, strongly curved anteriorly; postgonite short; basiphallus elongate, tube like, without epiphallus; distiphallus broadly membranous.

Female. Head densely grayish white pruinose; antenna brown-black, apex of pedicel and inner basal area of postpedicel reddish; arista brown. Vertex 0.28–0.30 of head width; frontal vitta weakly widened anteriorly, slightly narrower than fronto-orbital plate at middle; parafacial about 1.5 times as wide as postpedicel at mid height; gena about 0.26 of eye height. Inner vertical setae fine, converging apically, about 1/3 of eye height; outer vertical seta very fine, at most 2/3 as long as inner vertical seta; ocellar seta fine hair-like; 1 fine outwardly directed prevertical seta; 1 still finer proclinate orbital seta; lowest frontal seta nearly level with base of antenna; fronto-orbital plate with an irregular row of fine rather long hairs, 1–2 fine hairs present below lowest frontal seta; vibrissa fine, slightly above level of lower margin of face; occiput with 1–2 rows of fine, black hairs behind postocular setae. Antenna with postpedicel about 1.9 times as long as pedicel. Arista thickened on basal 1/4.

Thorax brown-black, notopleural area, outside of intra-alar area, posterior margin of postsutural scutum and scutellum reddish brown, with rather thin, grayish pruinosity. All setae fine; 2 (?, fine hair-like) presutural and 2 (?, fine hair-like) postsutural acrostichal setae; 2–3 presutural and 4 postsutural dorsocentral setae; 2 postsutural intraalar setae; 2 supra-alar setae; scutellum with 2 discal scutellar setae situated close to apex of scutellum, and with 3 marginal scutellar setae, apical scutellar seta absent, lateral seta very fine. Wing: Slightly and evenly tinged with pale brown; tegula black, basicosta brown; lower calypter pale brown; relative lengths of costal sectors 2nd, 3rd and 4th approximately as 2:4.5:1.5; petiole of vein R 4+5 slightly longer than last section of vein CuA 1 and shorter than dm-cu crossvein; vein M from dm-cu crossvein to bend slightly more than distance between bend and wing margin (2.5:2). Legs. Brown, sometimes basal portion portion and almost entire hind femur reddish; pulvilli pale pulvilli pale yellowish; mid tibia with 2 anterodorsal and 2 posterodorsal setae; hind tibia with 2 preapical dorsal and 1 fine apical posteroventral setae; fore tarsi weakly dilated and flattened; claws and pulvilli short.

Abdomen reddish yellow, without pruinosity. Fourth and 5th tergites each with fine and rather long marginal setae. Female terminalia: Sixth tergite entire, with a row of marginal setae, upper ones stronger, longer than 7th tergite; 6th abdominal spiracle on ventral margin of 6th tergite, and 7th abdominal spiracle indistinguishable; intersegmental membrane between 6th and 7th segments at most 1.5 times as long as 6th tergite; 7th tergite entire, with a row of rather strong setae on posterior margin; 7th sternite slightly shorter than 6th sternite, with a row of setae on posterior margin; 8th tergite absent; 8th sternite reduced to quadrate sclerite, with several hairs on posterior margin; upper hypoproct about 1.5 times as long as 7th tergite; epiproct absent.

First instar larva. Body length: 0.45–0.55 mm. Cephaloskeleton widened apically and upper corner slightly projected forward, upper cornu slightly longer than lower cornu; 3rd to 10th body segments each with longitudinal wrinkles and weakly sclerotized dorsal areas.

Distribution. Taiwan.

Remarks. Crosskey (1967) synonymized Kosempomyiella rufiventris Baranov with A. formosensis Townsend. This synonymy was confirmed by HS by examining the type specimens of both species.

Figures

FIGURES 6–10. Male 5th abdominal sternite and male and female terminalia of Austrophasiopsis formosensis Townsend. 6. Male 5th sternite, in ventral view (hairs on left side omitted). 7. Epandrium, surstylus and cerci, in lateral view (hairs on epandrium omitted). 8. Same as preceding, in dorsal view (hairs on epandrium and right side of cerci omitted). 9. Hypandrium, pregonite and postgonite and phallus, in lateral view. 10. Female terminalia, in lateral view. Scales: 0.1 mm (except for Fig. 10).

FIGURES 11–18.Adult habitus and 1st instar larva. 11. Male of Austrophasiopsis caliginosa sp. nov., in lateral view (paratype, Nepal). 12. Male head of A. caliginosa sp. nov., in lateral view (paratype, Nepal). 13. Holotype female of A. formosensis Townsend, in lateral view (DEI). 14. Male of A. formosensis, in lateral view (Taiwan). 15. Male head of A. formosensis, in lateral view (Taiwan). 16. Female head of A. formosensis, in lateral view (Taiwan). 17. Holotype male of Austrophasiopsis luteipennis Mesnil, in lateral view (ZMH) 18. First instar larva of A. formosensis (Taiwan).