Mycomya jeti, 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 : 144-145

Mycomya jeti sp. n.

Figs. 10 A–E

Material studied. Holotype. ♂. NEPAL, Ktmd. Pulchauki, 6800', Mal. tr., 14.VII. 1967, Can Nepal Exp. (in CNC). Paratypes. Same data as holotype, but 6600', 18.VII. 1967, 9 ♂♂ (7 ♂♂ in CNC, 2 ♂♂ in MZH); same data, but 6600', 16.VIII. 1967, 1 ♂ (in CNC); Ktmd., Godavari, R. Bot. Gdn., 5000', 6.VIII. 1967, Can. Nepal Exp., 1 ♂ (in CNC); Dobang Kharka, 83°24'E, 28°36'N, 9.X. 1971, A. Nakanishi, 1 ♂ (in KUC). Other material. MYANMAR, Kambaiti, 7000 ft., 11.V. 1934, Malaise, 4 ♂♂ (in MZH); same data, 2000 m, 13.V. 1934, 1 ♂ (in MZH); same data, 4.VI. 1934, 1 ♂ (in MZH); same data, 7.VI. 1934, 2 ♂♂ (in MZH).

Description. ♂. Head. Palp yellowish to brownish, other mouthparts yellow, face yellow, posterior parts of head brownish. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 3x, 2nd flagellomere 2x, its width. Thorax. Pronotum yellow, with 2 long setae. Scutum brownish with indistinct stripes, anterolateral corners yellow. Anepisternum and preepisternum yellow. Scutellum yellow, with 4 long setae. Laterotergite yellowish. Mediotergite yellowish, bare. Wing. Wing length 2.8–3.7 mm. Wing hyaline. Sc ending in R1 near or slightly proximad of middle of small cell, Sc1 missing. Apical part of Sc bearing 4–9 small setae. Small cell about 1.5x as long as wide. Cu slightly distal to M fork. M ratios: 0.91–1.00, 1.25–1.39. Cu ratios: 0.82–0.94, 1.34–1.47. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter pale yellowish. Legs. Coxae yellow, femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.72–0.76, bt2:t2 = 0.64–0.65, bt3:t3 = 0.53–0.54. Abdomen. Tergites light brownish, sternites slightly paler. Hypopygium. Figs. 10 A–E: yellow. Tergal part with 2 pairs of combs, outer combs widely separated from each other. Tergal lateral appendage long, slender, at least 5x as long as its narrowest part, apically slightly wider, with few setae, and several flattened subapical setae ( Fig. 10 C). Sternal submedian filament short, only slightly curved, not extending beyond apex of sternal synsclerite. Gonostylus about 3x as long as wide, curved, with 4–7 subapical teeth in 2 groups, 1 strong seta, and membranous lateral lobe about ½ of length of main branch of gonostylus ( Fig.

10D). Sternal synsclerite with narrow, slightly curved appendage near base of gonostylus. Aedeagus with 2 slender, lateral lobes extending slightly beyond its apex ( Fig. 10 E).

Discussion. Mycomya jeti resembles Eastern Palaearctic M. neodentata Väisänen, 1984 and Chinese M. odontoda Yang & Wu, 1988 and M. dentalosa Yang & Wu, 1988, in having short and almost straight sternal submedian appendage ( Figs. 10 B, 10D), but differs from them in the other details of the male hypopygium. The gonostylus of M. neodentata is very strongly curved and the two groups of the teeth are widely separated from each other (Väisänen 1984: fig.1034). Mycomya odontoda , which is known from Fujian and Guizhou, southern China, lacks the several flattened subapical setae of the tergal lateral appendage which are present in M. jeti ( Fig. 10 C). The tergal lateral appendage of M. dentalosa , known from different parts of China (Guizhou, Hunan, Heilongjiang), is much broader than in M. jeti and the gonostylus is straight and its membranous lobe is very large.

Etymology. The species name is a noun in apposition and refers to the snowman in the Himalayan Tibetan mythology.

Figures

FIGURE 10. Mycomya jeti sp. n., male hypopygium. A – B tergal and sternal views, C tergal lateral appendage, twice enlarged, D gonostylus and sternal submedian filament, twice enlarged, E apex of aedeagus, sternal view, twice enlarged. Scale 0.2 mm.