Curiosimusca khooi, Rung & Mathis & Papp, 2005

Rung, Alessandra, Mathis, Wayne N. & Papp, László, 2005, Curiosimusca, gen. nov., and three new species in the family Aulacigastridae from the Oriental Region (Diptera: Opomyzoidea), Zootaxa 1009 (1), pp. 21-36 : 27-30

Curiosimusca khooi , sp. nov. ( Figs. 1–8 )

Diagnosis. This species is distinguished from congeners by the following combination of characters: Face not strongly projected anteriorly, wing mostly brown infuscate, crossveins dm­cu and r­m partially white but neither covered with a white spot.

Description. Coloration and vestiture: Frons ( Fig. 4 ) mostly dark brown, shiny, very sparsely microtomentose, with more microtomentum around bases of vertical setae; ocellar tubercle very sparsely microtomentose; anterior margin of frons slightly lighter in color, light brown. Antenna light brown, appearing darker from some angles of view. Face ( Fig. 2 ) light brown, usually with thin white, microtomentose stripe at ventral margin as a continuation of genal stripe, sometimes facial portion of stripe weakly developed. Palpus light brown. Thorax ( Figs. 1, 3 ) uniformly dark brown, moderately microtomentose. Wing ( Fig. 5 ) with exception of portions of crossveins r­m and dm­cu uniformly infuscate, moderately brown; posterior portion of crossvein r­m slightly whitish; anterior portion of crossvein dm­cu white; crossvein r­m aligned with apex of vein R 1; halter dark brown but with apex of knob whitish. Forecoxa pale, light brown, slightly darker at base; forefemur and foretibia dark brown, with apical 1/5 of foretibia light brown; foretarsus concolorous with apex of foretibia, with apical 2 tarsomeres darker brown; mid­ and hindcoxa pale, almost white; base of mid­ and hindfemora concolorous with respective coxa, remainder of mid­ and hindfemora dark brown; tibiae dark brown except light brown apex, which is concolorous with respective tarsi; hindtibia with basal 1/3 pale brown to almost white. Abdomen dark brown to black, darker laterally and along posterior margins of tergites, moderately microtomentose; base of syntergosternite 6–8 moderately microtomentose, remainder of syntergosternite and epandrium bare, shiny.

Morphology: Head: Slightly longer than high in lateral view, head ratio 0.59 ( Fig. 3 ); considerably wider than high in anterior view ( Fig. 2 ); ventral portion of face slightly projected. Eye oval, obliquely oriented to general plane of head. Wing ( Fig. 5 ): Costal vein ratio 0.067; crossvein r­m aligned transversely with apex of vein R 1 and basal to midlength of combined cell dm­bm.

Male terminalia: epandrial height in lateral view ( Fig. 6 ) about twice width; surstylus in lateral view ( Fig. 6 ) oriented posteroventrally and at angle to orientation of epandrium, surstylus generally straight (not angulate), thumblike, broadly attached basally to epandrium, generally with setulae evenly distributed, these better developed along posteroventral surface; cercus ( Figs. 6, 8 ) very well sclerotized, elongate, dorsal 1/2 wider than ventral 1/ 2 in posterior view ( Fig. 8 ) shallowly arched laterally, parallel­sided and nearly meeting ventrally, setulae more or less uniformly scattered; phallapodeme projected ventrally on both sides, shielding phallus; distiphallus with 2 internal, rod­like sclerites ( Fig. 7 ).

Measurements and ratios: Body length 3.10–3.50 mm. Wing ( Fig. 5 ) length 2.75–2.95 mm; width 1.00– 1.10 mm.

Type material. The holotype male is labeled “ THAILAND, [Nan:] Doi Phuka [sometimes transliterated as Doi Phu Kha] N[ational]P[ark], No 18[,] 26– 27.11.2003 [26–27 Nov 2003]/ UV light, leg. Peregovits, Flödvári, Körösi, Szappanos & Maklári­Kis/ Aulacigastridae Undescribed genus [handwritten]/ HOLOTYPE ♂ Curiosimusca khooi Rung, Mathis & Papp HNHM [red].” The holotype is double mounted (minuten in a rectangular card), is in excellent condition and is deposited in the HMNH . Paratypes are as follows: same locality data as the holotype (1♂; USNM). MALAYSIA. Selangor: Genting Highlands (03°24’N 101º48’E), 8 Aug 1986, K. C. Khoo (1♂, 2♀, 1?; AM, USNM) .

Type locality. THAILAND. Nan. Doi Phu Kha National Park (19º12’N, 100º59’E) .

Distribution. Oriental: Malaysia (Selangor), Thailand (Nan).

Etymology. The species epithet, khooi , is a Latin genitive patronym to recognize K. C. Khoo, who has contributed significantly to research on Opomyzoidea ( Khoo 1985) and who collected the specimens of the type series from Malaysia.

Remarks. A collector of the holotype, Dr. M. Flödvári, wrote that this specimen was collected in a valley associated with a secondary forest and at an elevation of 1700 m. The UV light was positioned to attract insects from the valley.

Figures

FIGURES 1–5. Curiosimusca khooi, sp. nov. 1, Habitus of male (Malaysia. Selangor: Genting Highlands; 03º24’N 101º48’E), lateral view. 2, Head, anterior view. 3, Head and thorax, lateral view (oc = ocellar seta; dc = dorsocentral seta; fr­ob = fronto­orbital seta; lvt = lateral vertical seta; mvt = medial vertical seta). 4, Head, anterodorsal view. 5, Wing, dorsal view.

FIGURES 6–8. Curiosimusca khooi, sp. nov. 6, Male terminalia, lateral view. 7, Phallus, lateral view. 8, Cerci and pregonites, posterior view.