Siphona (Aphantorhaphopsis) laticornis ( Malloch, 1930 )

Tachi, Takuji & Shima, Hiroshi, 2023, Systematic study of the subgenus Aphantorhaphopsis of the genus Siphona in East Asia and the Oriental Region (Diptera: Tachinidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 63 (1), pp. 213-247 : 231-235

Siphona (Aphantorhaphopsis) laticornis ( Malloch, 1930)

( Figs 54–57 )

Actia laticornis Malloch, 1930: 131 . Type locality: Malaysia, Selangor. Ceromya laticornis : CROSSKEY (1976: 212), CROSSKEY (1977: 644). Siphona (Aphantorhaphopsis) laticornis : O’HARA (1989: 96), O’HARA et al. (2020: 798).

Type material examined. HOLOTYPE: J ( NHMUK), MALAYA PENIN / Selangor / Bukit Kutu / 3500 ft. /, April 20th 1926 / H.M. Pendlebury . Additional material examined. MALAYSIA: PAHANG: 2 JJ ( SMNH), Cameron Highlands,Gunung Jasar 1700 m (malaise trap),20–23, 24–27.xi.1994.

Diagnosis. Abdomen blackish in ground color; labella pad-like; 4 postsutural dorsocentral setae.

This species has blackish abdomen similar to members of the S. perispoliata group, but the male postabdominal characters are distinctly different. The pregonite of this species has one weak dorsal seta, which is the feature of the S. siphonoides group.

Redescription. Body length 2.8–3.0 mm. Male. Head whitish in ground color; fronto-orbital plate with dark grayish pruinosity; frontal vitta brown; antenna with scape, pedicel and arista dark brown; postpedicel black; palpus reddish yellow. Vertex approximately 0.4 of head width; parafacial narrower than width of 2nd aristomere at middle height; gena 0.25–0.28 of eye height; anterior reclinate orbital seta situated posterior to middle of fronto-orbital plate; fronto-orbital plate with row of short setae; antenna with postpedicel suboval, approximately twice as long as wide, and 4.5–5.0 times as long as pedicel; 2nd aristomere approximately 4 times as long as wide; 3rd aristomere thickened on basal 3/5; palpus somewhat clavate; prementum approximately 3 times as long as wide and approximately 0.38 times as long as eye height; labella pad-like.

Thorax. Dorsum blackish in ground color; postpronotal lobe with grayish pruinosity; apex of scutellum pale yellow; pleura brown, with grayish pruinosity. Three presutural and 4 postsutural dorsocentral setae.

Wing. Tegula black; basicosta light yellow; lower calypter dark brown. Relative lengths of costal sectors two, three, and four approximately 1: 6: 3; ultimate section of M 4 approximately 0.55 times as long as penultimate section, and approximately 1.5 times as long as crossvein dm-m; R

1

bare.

Legs. Coxae and femora brownish; trochanters and tibiae yellowish; tarsi blackish. Hind tibia with 3–6 anterodorsal, 2–4 posterodorsal, and 3 ventral setae.

Abdomen blackish in ground color; anterior 1/5 of tergites 3–4 and anterior 1/3 of tergite 5 with whitish pruinosity. Syntergite 1+2 without lateral marginal setae; tergite 3 with pair of lateral and median marginal setae; sternite 5 with pair of rounded median lobes on inner edge; apical lobe somewhat elongated and slightly curved inwards.

Male postabdomen. Surstylus nearly straight and strongly narrowed in apical 1/ 3 in lateral view; cerci strongly narrowed and pointed apically in lateral view; pregonite somewhat pointed apically in lateral view, with one short dorsal seta; postgonite slightly curved ventrally and rounded apically; epiphallus absent; distiphallus suboval in lateral view, broadly sclerotized bearing some spinules ventrally.

Female. Unknown.

Host. Unknown.

Distribution. Malaysia (Pahang, Selangor) ( MALLOCH 1930, O’HARA et al. 2020).

Figures

Figs 54–57. Male postabdomen of Siphona (Aphantorhaphopsis) laticornis (Malloch, 1930) (Malaysia, Pahang). 54 – epandrium, cerci and surstylus in lateral view; 55 – epandrium, cerci and surstylus in dorsal view (setae omitted on left side); 56 – hypandrium, pregonite, postgonite and phallus in lateral view; 57 – fifth abdominal sternite in ventral view (setae omitted on left side). Scale bars = 0.1 mm.