Rosapha flavipes , Kovac, Damir & Rozkošný, Rudolf, 2012

Kovac, Damir & Rozkošný, Rudolf, 2012, A revision of the genus Rosapha Walker (Diptera: Stratiomyidae), Zootaxa 3333, pp. 1-23: 8-9

publication ID 10.5281/zenodo.210456

persistent identifier

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scientific name

Rosapha flavipes

sp. nov.

Rosapha flavipes  sp. nov.

( Figs 16 –18View FIGURES 12 – 21, 34View FIGURES 33 – 46, 61View FIGURES 55 – 62, 79View FIGURE 79)

Diagnosis. Basal part of flagellum subconical, apical style flattened, band-shaped, without apical seta, frontal spots present. Scutum and scutellum reddish yellow, blackish medial scutal stripe more or less developed. Wing with two separated brownish spots. Legs yellow, only fore tarsi darkened.

Description. Male ( Figs 16 –18View FIGURES 12 – 21, 34View FIGURES 33 – 46, 61View FIGURES 55 – 62). Length: body 4.4–5.4 mm, wing 4.0– 4.4 mm. Head spherical in lateral view and about 1.4 times as broad as long in dorsal view, prominent ocellar triangle at posterior margin of head. Upper frons very narrow and short, barely as long as ocellar triangle. Lower frons ( Fig. 34View FIGURES 33 – 46) transversely subtriangular, with finely, medially divided whitish tomentose frontal spot. Frontal spot narrowly fused with narrow, whitish tomentose lateral facial stripes along eye margins. Antenna reddish yellow but apical style (= last two flagellomeres) black. Last flagellomere flattened, band-shaped, with dense and very short pubescence, almost as broad as pedicel at distal margin, about 1.7 times longer than rest of antenna. Face black with fine and short whitish pubescence, concave toward middle. Labellum and palpus pale but darkened toward apex. Postgena with mixed black and white erect hairs.

Thorax reddish yellow, scutum with broad, black medial stripe reaching to scutellum ( Fig. 61View FIGURES 55 – 62). Pronotum, propleura, ventral part of katepisternum and mediotergite black. Postpronotal callus and narrow subnotopleural stripe whitish yellow. Scutellum reddish yellow, spines paler, outer scutellar spines distinctly shorter than inner. Thoracic pile short and inconspicuous, mainly pale. Wing with two darkened areas, stigma and cell r 4 (and adjoning area of cell r 5) but also other cells (except discal cell) partly and slightly infuscated. Halter entirely white. Legs pale yellow including coxae, only distal half of fore tibia and fore tarsus appear darkened due to dense blackish pubescence.

Abdomen black, only very narrow lateral margin of tergites more brownish. Abdominal pile mostly short and appressed, black dorsally and whitish ventrally. Male terminalia ( Figs 16–18View FIGURES 12 – 21): Proctiger subconical, epandrium fairly long ( Fig. 16View FIGURES 12 – 21), genital capsule with transverse proximal dilation and subtriangular posterior medial process, gonocoxite with low and rounded posterior inner process, gonostylus with short subapical protuberance on distal margin ( Fig. 17View FIGURES 12 – 21), aedeagal complex slender, aedeagal apodeme somewhat gradually dilated proximally ( Fig. 18View FIGURES 12 – 21).

Female. Length: body 4.9–5.2 mm, wing 3.8–4.2 mm. Head as high as long in profile and 1.4 times as broad as long in dorsal view. Narrowest part of frons almost twice as broad as ocellar triangle. Postocular area at upper angle of eye about as broad as pedicel is long. Frons shining black, transverse whitish tomentose spot above antenna not touching eye margins and separated from facial tomentose stripes along eye margins. Antenna as in male but shorter, basal complex of flagellum larger and more oval and last, band-shaped flagellomere only 1.4 times longer than rest of antenna. Head pile mostly short, appressed and inconspicuous, whitish and more erect only on white facial stripes, postgena and lower half of postocular area. Thorax, wing and legs as in male but black part of pleura extended to lower part of anepisternum and anterior part of katepisternum. Mediotergite usually yellow. Abdomen more oval, black on both sides and paler lateral margins of tergites only very narrow or indistinct. Female terminalia not examined.

Etymology. The specific name refers to the completely yellow (= flavus) legs (leg = pes).

Variation. The very characteristic medial stripe on the scutum may be narrowed in the middle, partly reduced or even indistinct in specimens from the same population. Sometimes a black medial spot on the scutellum is distinct. The black part of the thorax may be extended onto the lower part of the pleura and the subscutellum may be darkened on the lower half. The pale dorsal margin of the abdomen may be yellow and relatively broad in some females.

Material examined. Type material: Holotype: Male, Thailand, Mae Hong Son, district Pangmapha, near Ban Nam Rin, sweeping in seepage area, 18.iv. 2010, D. Kovac, in SMF.

Paratypes: 25 3, 6 Ƥ, all from Thailand: 1 Ƥ from the same locality as the holotype but sweeping along the right stream, 26.iv. 2010, D. Kovac, in FSMU; 14 3, 1 Ƥ from Chiangdao, 5.– 11.iv. 1958 and 11 3, 4 Ƥ from Chiangmai, Fang, 12.– 19.iv. 1958, T. C. Maa, in BPBM.

Distribution. Only known from two localities in Thailand ( Fig. 79View FIGURE 79).


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