Mycomya marmota, Väisänen, Rauno, 2013

Väisänen, Rauno, 2013, New Mycomya species from the Himalayas (Diptera, Mycetophilidae): 2. Subgenera Calomycomya, Cymomya, Neomycomya and Pavomya subg. n., Zootaxa 3666 (3), pp. 301-318 : 304

Mycomya marmota sp. n.

Figs. 1 A–D

Material examined. Holotype. 3. E. NEPAL, Basantapur (2300 m) 27°07'N, 87°24'E May 1–5. 1972 Malaise trap Kyushu Univ. Col. (in KUC). Paratypes (3 only). Gupa Pokali, 27°17'N, 87°30'E, 2900 m—Chouki, 27°12'N, 87°28'E, 2700 m, 16.VII. 1972, J. Emoto, 1 3 (in KUC); Dobang Kharka, 83°24'E, 28°36'N, 15.X. 1971, A. Nakanishi, 1 Ƥ (in KUC); same locality, 20.X. 1971, 1 3 (in KUC); same locality, Malaise trap, 25–26. X. 1971, 1 3 (in KUC).

Description. 3. Head. Palp, other mouthparts and face yellow, posterior parts of head brownish, ocellar prominence brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 2.5x, 2nd flagellomere 1.5x, its width. Thorax. Pronotum yellow, with 3–4 long setae. Scutum yellowish to light brownish with indistinct longitudinal stripes. Anepisternum and preepisternum yellow. Scutellum light brownish, with 4 long setae. Laterotergite light brownish. Mediotergite light brownish, bare. Wing. Length 3.8–5.2 mm. Wing hyaline, small cell and wing apex very weakly infuscated. Sc ending in C distinctly distad of middle of small cell, Sc2 ending in R1 distad of middle of small cell. Apical part of Sc bearing 10–16 small setae. Small cell almost 2x as long as wide. Cu fork below M fork. M ratios: 0.36–0.38, 0.44–0.50. Cu ratios: 0.70– 0.88, 1.04–1.53. Small setae: M petiole: 0; M1: +; M2: +; Cu petiole: +; Cu1: +; Cu2: +. Halter pale yellowish, apex brownish. Legs. Coxae yellow, coxa 3 sometimes with brownish spot on outer side, femora yellow, tibiae and tarsi brownish. Coxa 1 with some thin setae along anteromedial surface. Coxa 2 with short curved spur; apex of spur with 1 tooth. Leg ratios: bt1:t1 = 1.00–1.10, bt2:t2 = 0.72–0.77, bt3:t3 = 0.59–0.62. Abdomen. Tergites 1–5 yellow to yellowish, with brown dorsal line and posterior margins, 6–7 brown. Sternites 1–5 yellow, 6–7 brownish. Hypopygium. Figs. 1 A–D, yellowish. Tergal fork very narrow, apically narrower than its length, V-shaped, with short apical setae about as long as the diameter of each branch of tergal fork, and relatively wide thin lateral lobes almost as long as tergal fork ( Fig. 1 A). Sternal lateral appendages with relatively short flattened setae ( Fig. 1 B). Gonostylus with two branches, one wide, apically curved branch with indistinct subapical tooth and another short, slender and curved ( Fig. 1 C). Aedeagus with two apically pointed, long spurs about 4x as long as narrowest width of aedeagus in lateral view ( Fig. 1 D).

Discussion. The diagnostic characters of M. marmota include the very narrow, V-shaped tergal fork (about 1.3x as long as its apical width; Fig. 1 A), and the gonostylus with the curved, slender branch short (only about 0.5x as long as the whole gonostylus), much shorter than the thicker branch ( Fig. 1 C).

Etymology. The species name marmota is a noun in apposition and refers to the Himalayan marmot.

Figures

FIGURE 1. Mycomya marmota sp. n., male hypopygium. A – B tergal and sternal views; C gonostylus, twice enlarged; D apex of aedeagus, lateral view, twice enlarged. Scale 0.2 mm.