Mycomya yatai, Väisänen, Rauno, 2014

Väisänen, Rauno, 2014, New Mycomya species from South-East Asia (Diptera, Mycetophilidae), Zootaxa 3815 (4), pp. 526-540 : 538-539

Mycomya yatai sp. n.

Figs. 8 A–F

Material studied. Holotype. ♂. PHILIPPINES, Mindanao, Mt. Apo, Agko – Lake Binado 1350–2300 m alt. 3.viii. 1978 Nakanishi, A. & Yata, O. leg. (KUC). Paratypes (only ♂♂). Same data, 1 ♂ (KUC); Mindanao, Mt. Apo, Agko, 1350 m, Malaise trap, 3–5.VIII. 1978, A. Nakanishi. & O. Yata, 2 ♂♂ (KUC). Other material. Same data as holotype, 1 ♀ (KUC).

Description. ♂. Head. Palp, other mouthparts and face yellow, posterior parts of head brownish to brown. Antenna brownish to brown, scape, pedicel and base of 1st flagellomere yellow. 1st flagellomere about 2.5x its width, 2nd 2x its width. Thorax. Pronotum yellow, with 4 long setae. Scutum brownish to brown, anteromedial part yellowish. Anepisternum and preepisternum yellow. Scutellum brownish, with 4 long setae. Laterotergite brown. Mediotergite brown, bare. Wing. Length 4.3–4.5 mm. Wing hyaline, small cell and wing apex weakly infuscated. Sc ending in C distinctly distad of middle of small cell, Sc2 ending in R1 slightly proximad or slightly distad of middle of small cell. Apical part of Sc bearing 5–10 small setae. Small cell less than 1.5x as long as wide. Cu fork below M fork. M ratios: 1.18–1.31, 1.61–1.73. Cu ratios: 0.82–0.83, 1.32. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter yellowish, apex brown. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.93–0.97, bt2:t2 =? (structure missing), bt3:t3 = 0.58–0.59. Abdomen. Tergites 1–5 brown, with yellow anterolateral spots, 6–7 brown. Sternites 1–5 yellow, 6–7 brownish. Hypopygium. Figs. 8 A–E, yellow. Sternal lateral appendage relatively short, triangular, apically blunt, sparsely setose ( Fig. 8 C). Apical 1/3 of sternal synsclerite covered by long setae, some short, thin setae also along the submedian margin. Sternal submedian filament longer than sternal lateral appendage ( Fig. 8 B–C). Apex of aedeagus rounded ( Fig. 8 D). Female. Wing length 5.1 mm. Scutum brown with 3 yellowish longitudinal stripes. Pronotum, anepisternum and preepisternum yellow. Scutellum, laterotergite and mediotergite brown. Abdominal tergites brown with wide yelow anterior parts. Leg ratios: bt1:t1 = 0.94, bt2:t2 =? (structure missing), bt3:t3 = 0.61. Sc with about 25 small setae. Terminalia yellow ( Fig. 8 F–G).

Discussion. Mycomya yatai belongs to the subgenus Cymomya (as discussed for M. klossi above). It is a relatively dark and large species (wing length 4.3–4.5 mm) with some wing markings similar to those in M. klossi and M. parakloss i. It differs from the other species of the subgenus in having a short, triangular, basally wide, apically blunt, sternal lateral appendage, in its sparse setosity of the sternal synsclerite, and in the presence of the sternal submedian filament, which is longer than the sternal lateral appendage ( Fig. 8 B–C). M. yatai resembles the New Caledonian M. rufonigra Matile (1991: fig.1) , which is also a large species (wing length 4.2 mm), but differs from it in having the M and Cu veins entirely bare.

Etymology. The species is named after the Japanese entomologist, O. Yata, who collected the holotype (together with A. Nakanishi).

Figures

FIGURE 8. Mycomya yatai sp. n., male hypopygium. A – C sternal and lateral views, D apex of aedeagus, lateral view, twice enlarged, E tergite 8. Female genitalia. F lateral view, G hypogynal valves, ventral view. Scale 0.2 mm.