Mycomya ratufa, 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 : 305-307

Mycomya ratufa sp. n.

Figs. 2 A–F

Material studied. Holotype. 3. MYANMAR, N.E. Burma, Kambaiti, 2000 m, 4.VI. 1934 Malaise (in MZH). Paratypes (3 only). Same locality, 3 3 and 1 Ƥ (in MZH); same locality, 2000 m, 11.V. 1934, Malaise, 2 3 (in MZH); same locality, VI. 1934, 1 3 (in MZH).

Description. 3. Head. Palp, other mouthparts and face yellowish, posterior parts of head yellowish to brownish, ocellar prominence brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 3x, 2nd flagellomere 1.5x, its width. Thorax. Pronotum yellow, with 4 long setae. Scutum yellow with yellowish to light brownish with indistinct fused longitudinal stripes. Anepisternum and preepisternum yellow to yellowish. Scutellum yellowish, with 4 long setae. Laterotergite yellow to yellowish. Mediotergite yellowish, bare. Wing. Length 4.1–4.5 mm. Wing hyaline. Sc ending in C distad of middle of small cell, Sc2 ending in R1 near middle of small cell. Apical part of Sc bearing 10–14 small setae. Small cell about 2x as long as wide. Cu fork distal, below or slightly proximal to M fork. M ratios: 0.42–0.45, 0.50–0.56. Cu ratios: 0.74– 0.86, 0.90–1.33. Small setae: M petiole: 0; M1: +; M2: +; Cu petiole: +; Cu1: +; Cu2: +. Halter yellowish. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 with short curved spur measuring about 1/2 of its length; apex of spur with 1 curved tooth. Leg ratios: bt1:t1 = 1.09–1.22, bt2:t2 = 0.69–0.71, bt3:t3 = 0.60– 0.64. Abdomen. Tergites 1–5 yellow, with wide brown posterior margins and brown dorsomedial stripe, 6–7 brown. Sternites yellow. Hypopygium. Figs. 2 A–F, yellowish. Tergal fork wide, about 0.8x as long as wide, Ushaped, with very short apical setae, and small thin lateral lobes about 0.5x as long as tergal fork. Sternal lateral appendage rounded, with long flattened setae ( Fig. 2 D). Gonostylus with two branches, one wide with two dark apical-subapical teeth and another long, slender and curved ( Fig. 2 E). Aedeagus with two spurs about 3x as long as narrowest width of aedeagus in lateral view ( Fig. 2 F). Female. Wing length 5.2 mm. Thorax as in 3. Abdominal tergites 1–6 yellow, with wide brown posterior margins and brown dorsomedial stripe, 7 brown, sternites yellow. Leg ratios: bt1:t1 = 1.17, bt2:t2 = 0.73, bt3:t3 = 0.59. Terminalia yellow.

Discussion. The diagnostic characters of M. ratufa include the wide, U-shaped tergal fork (about 0.8x as long as its apical width; Fig. 2 A) and its lateral membraneous lobes being only about half of the length of the fork ( Figs. 2 A, 2C). The membranous, brush-like tergal lateral structure of M. ratufa (also visible lateral of tergal lobes in Figs. 2 A, 2C) is smaller, only about 0.5x the length of the tergal fork, whereas in M. marmota ( Fig. 1 A) and M. wah ( Fig. 3 C) the lateral structure is at least as long as the tergal fork. The narrower branch of the gonostylus of M. ratufa is strongly curved and about as long as the thicker branch.

Etymology. The species name is a noun in apposition and refers to the Oriental giant squirrel (genus Ratufa ).

Mycomya wah sp. n. Figs. 3 A–E

Material studied. Holotype. Male. E. NEPAL, Topke Gola (3700 m) 27o38'N, 87o35'E --- Thurukpa (2600 m) 27°36'N, 87°36'E. July 9, 1972 Pemba Norbu Kyushu Univ. Col. (in KUC). Paratype. Thudam, 27°45'N, 87°32'E, Malaise trap, 8–9.VII. 1972, Kyushu Univ. Col. 1 3 (in MZH).

Description. 3. Head. Palp and other mouthparts yellowish to brownish, face yellowish, posterior parts of head brownish. (Antennae of holotype and paratype broken). Thorax. Pronotum yellow, with 4 long setae. Scutum yellowish with 3 indistinct longitudinal stripes, anterolateral corners yellow. Anepisternum and preepisternum brownish. Scutellum yellowish, with 4 long setae. Laterotergite brownish. Mediotergite brownish, bare. Wing. Length 5.5 mm. Wing hyaline, apex very weakly infuscate. Sc ending in C distad of middle of small cell, Sc2 ending in R1 distad of middle of small cell. Apical part of Sc bearing 12-13 small setae. Small cell about 2x as long as wide. Cu fork below or slightly proximal to M fork. M ratios: 0.48–0.56, 0.59–0.74. Cu ratios: 0.73–0.86, 1.14– 1.36. Small setae: M petiole: 0; M1: +; M2: +; Cu petiole: +; Cu1: +; Cu2: +. Halter pale yellowish, apex brownish. Legs. Coxae yellow, coxae 2 and 3 with brownish spot on outer side, femora yellow, tibiae and tarsi brownish to brown. Coxa 2 with short, curved spur shorter than half of coxa 2; apex of spur with 1 tooth. Leg ratios: bt1:t1 =?, bt2:t2 = 0.71, bt3:t3 = 0.60. Abdomen. Tergites 1–5 yellowish with brown dorsal line and wide brown posterior margins, 6–7 brown. Sternites 1–5 yellow, 6–7 brownish. Hypopygium. Figs. 3 A–E, yellow. Tergal fork narrow, apically narrowed than its length, V-shaped, with very short apical setae, and wide thin lateral lobes ( Fig. 3 A). Sternal lateral appendage relatively long, with long flattened setae ( Fig. 3 B). Gonostylus with two branches, one with indistinct subapical tooth, and another slender and curved ( Fig. 3 D). Aedeagus with two relatively short, bilobed spurs, each about 2x as long as narrowest width of aedeagus in lateral view ( Fig. 3 E).

Discussion. The diagnostic characters of M. wah include a narrow, v-shaped tergal fork (about 1.1x as long as its apical width), the lateral lobes of which are about as long as wide ( Fig. 3 A, 3C), and the narrower branch of the gonostylus is slightly shorter than the thicker branch, which is gradually tapering towards its apex without a wider middle part ( Fig. 3 D). The tergal fork of the closely related M. marmota is a bit narrower (its length about 1.3x its apical width; Fig. 1 A) and the slender branch of its gonostylus is much shorter than the broader one, which is widest at the midlength ( Fig. 1 C).

Etymology. The species name is a noun in apposition and refers to the red panda, which is called ‘wah’ in Nepalese language.

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.

FIGURE 2. Mycomya ratufa sp. n., male hypopygium. A – C tergal, sternal and lateral views, tf—tergal fork; D apex of sternal lateral appendage, twice enlarged; E gonostylus, twice enlarged; F apex of aedeagus, lateral view, twice enlarged. Scale 0.2 mm.

FIGURE 3. Mycomya wah sp. n., male hypopygium. A – C tergal, sternal and lateral views; D gonostylus, twice enlarged; E apex of aedeagus, lateral view, twice enlarged. Scale 0.2 mm.