Mycomya ducula, Väisänen, Rauno, 2013

Väisänen, Rauno, 2013, New Mycomya species from the Himalayas (Diptera, Mycetophilidae): 3. Subgenera Cesamya and Mycomyopsis, Zootaxa 3737 (2), pp. 129-153 : 141-142

Mycomya ducula sp. n.

Figs. 8 A–E

Material studied. Holotype. ♂. NEPAL, Ktmd. Pulchauki, 6600' Mal. tr. 16.VIII. 1967, Can. Nepal Exp. (in CNC). Paratypes (only ♂♂). Same data as holotype, 5 ♂♂, 3 ♀♀ (in CNC); same data but 18.VII. 1967, 11 ♂♂, 2 ♀♀ (8 ♂♂, 1 ♀ in CNC, 3 ♂♂, 1 ♀ in MZH); same data, but 10.VIII. 1967, 4 ♂♂, 2 ♀♀ (in CNC); Papun, 27°32'N, 87°38'E, 2100 m, 15.VII. 1972, Y. Nishida, 1 ♂ (in KUC).

Description: ♂. Head. Palp and other mouthparts yellow, face brownish, posterior parts of head brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 3.5x, 2nd flagellomere 2x, its width. Thorax. Pronotum yellow, with 2 long setae. Scutum brownish to brown with indistinct stripes, anterolateral corners yellow. Anepisternum yellowish to brownish. Preepisternum brownish. Scutellum brownish, with 4 long setae. Laterotergite brownish. Mediotergite brownish, bare. Wing. Length 2.8–3.1 mm. Wing hyaline. Sc ending in R1 near, slightly proximad or slightly distad of middle of small cell, Sc1 missing. Apical part of Sc bearing 1–12 small setae. Small cell 1– 2 x as long as wide. Cu fork distinctly distal to M fork. M ratios: 0.89–0.96, 1.21–1.27. Cu ratios: 0.92–0.99, 1.50–1.64. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter pale yellowish, apex sometimes brownish. Legs. Coxae yellow, femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.75–0.83, bt2:t2 = 0.67–0.69, bt3:t3 = 0.54–0.61. Abdomen. Tergites brownish, sternites slightly paler. Hypopygium. Figs. 8 A–E: yellowish. Tergal part with two pairs of combs. Tergal lateral appendage relatively small and narrow, about 6x as long as wide, slightly curved, with few basal setae and some flattened apical setae ( Fig. 8 C). Sternal submedian filament missing. Gonostylus short and wide, at about 3x as long as wide, with about 5 subapical teeth, short curved spur with 1 strong apical tooth, and small membranous lateral lobe less than 1/3 of length of main branch of gonostylus ( Fig. 8 D). Aedeagus with 2 lateral lobes extending slightly beyond its apex ( Fig. 8 E). Female. Wing length 3.2–4.0 mm. Thorax as that in ♂. Abdomen brownish. Leg ratios: bt1:t1 = 0.80–0.82, bt2:t2 = 0.60–67, bt3:t3 = 0.51–0.56. Terminalia yellowish.

Discussion. Mycomya ducula is a small species, which differs from the other species of the subgenus Mycomyopsis in the narrow shape and sparse setosity of the tergal lateral appendage ( Fig. 8 C), the lack of sternal submedian filaments ( Fig. 8 B) and in having a short, wide gonostylus with a distinct spur ( Fig. 8 D). Etymology. The species name is a noun in apposition and refers to the genus of the imperial pigeons, Ducula Hodgson.

Figures

FIGURE 8. Mycomya ducula sp. n., male hypopygium. A – B tergal and sternal views, C tergal lateral appendage, twice enlarged, D gonostylus, twice enlarged, E apex of aedeagus, sternal view, twice enlarged. Scale 0.2 mm.