Mycomya kaa, 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 : 145

Mycomya kaa sp. n.

Figs. 11 A–E

Material studied. Holotype. ♂. MYANMAR, N.E. Burma, Kambaiti, 7000 ft. 1.VI. 1934, Malaise (in MZH). Paratypes. Same data as holotype, 11.V. 1934, altitude not mentioned, 1 ♂ (in MZH). NEPAL: Dobang Kharka, 83°24'E, 28°36'N, 20.X. 1971, A. Nakanishi, 1 ♂ (in KUC); same data, 24.X. 1971, 1 ♂ (in KUC).

Description. ♂. Head. Palp brownish, other mouthparts and face yellowish, posterior parts of head brownish. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 4x, 2nd flagellomere 2.5x, its width. Thorax. Pronotum yellow, with 3 long setae. Scutum yellow with 3 light brownish to brownish longitudinal stripes. Anepisternum and preepisternum yellowish. Scutellum yellowish, with 4 long setae. Laterotergite yellowish. Mediotergite light brownish, bare. Wing. Length 3.5–4.1 mm. Wing hyaline. Sc ending in R1 slightly proximad of middle of small cell, Sc1 missing. Apical part of Sc bearing 0–1 small setae. Small cell about as long as wide. Cu fork distal to M fork. M ratios: 0.85–0.96, 1.10–1.35. Cu ratios: 1.06–1.15, 1.73–2.07. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter yellowish, apically darker. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.83–0.84, bt2:t2 = 0.71–0.72, bt3:t3 = 0.60–0.61. Abdomen. Tergites brownish, sternites slightly paler than tergites. Hypopygium. Figs. 11 A–E: yellowish. Tergal part with 2 pairs of combs, outer combs widely separated from each other. Tergal lateral appendage proximally very wide, 4- 5 x as wide as its slender apical part; apical part of tergal lateral appendage long, narrow, strongly curved, bearing some slightly flattened, curved apical setae ( Fig. 11 C). Sternal submedian filament long, curved, extending far beyond apex of aedeagus. Gonostylus about 5x as long as wide, slightly curved, apically wider, with 5–7 subapical teeth, 1 long seta, and small lateral membranous lobe less than 1/2 of length of main branch of gonostylus ( Figs. 11 C–E). Aedeagus with 2 very long, curved apical filaments, extending far beyond its apex.

Discussion. The general structure of the male hypopygium and the tergal lateral appendage of M. kaa resemble those in Chinese M. gansuana Wu & Yang, 1994b and M. elegantula Wu & Yang, 1992, as well as Nearctic M. esox Väisänen, 1984 and M. byersi Väisänen, 1984 . Mycomya gansuana , which was described from Gansu, northwestern China, differs from M. kaa in lacking the long lateral lobes of the aedeagus, having a very small membraneous lateral lobe of the gonostylus (Wu & Yang 1994b: figs. 1A–C), and in having some small setae on the wing veins M1 and Cu2. Mycomya elegantula , described from Zhejiang, eastern China, is similar to M. kaa in the shape of the tergal lateral appendage, but its sternal submedian filament is short and straight (Wu & Yang 1992: figs. 3–5), not long and curved like in M. kaa . Mycomya esox also differs from M. kaa in having short and straight sternal submedian filaments (Väisänen 1984: fig. 1036). Mycomya byersi differs from M. kaa in having the basal part of the tergal lateral appendage not as wide as in M. kaa and tapering gradually towards its apex, and its narrow apical part is almost straight (Väisänen 1984: Fig. 1044), while in M. kaa the tergal lateral appendage is tapering very abruptly and its narrow apical part is strongly curved ( Fig. 11 C).

Etymology. The species name is a noun in apposition and refers to the fictional character from the Mowgli stories written by Rudyard Kipling.

Figures

FIGURE 11. Mycomya kaa sp. n., male hypopygium. A – B tergal and sternal views, C tergal lateral appendage, twice enlarged, D gonostylus (of holotype), twice enlarged, E apex of second gonostylus (of holotype; unusual form), twice enlarged. Scale 0.2 mm.