Mycomya apoensis, Väisänen, Rauno, 2014

Väisänen, Rauno, 2014, New Mycomya species from South-East Asia (Diptera, Mycetophilidae), Zootaxa 3815 (4), pp. 526-540 : 528-529

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Mycomya apoensis

sp. n.

Mycomya apoensis sp. n.

Figs. 1 View FIGURE 1 A–F

Material studied. Holotype. ♂. PHILIPPINES, Mindanao, Mt. Apo, Agko – Lake Binado 1350–2300 m alt. (holotype collected on the way between the two localities), 3–5.viii. 1978, Nakanishi, A. & Yata, O. leg. (KUC). Paratypes. Same data, 12 ♂♂ (KUC); same data but 3.VIII. 1978, 4 ♂♂ (KUC).

Description. ♂. Head. Palp, other mouthparts and face yellow, posterior parts of head brownish. Antenna brownish, scape, pedicel and base of 1 st flagellomere yellow. 1 st flagellomere about 4 x its width, 2 nd flagellomere 2.5 x its width. Thorax. Pronotum yellow, with 3–4 long setae. Scutum entirely light brownish or yellow with 3 brown longitudinal, posteriorly fused stripes. Anepisternum yellow to yellowish. Preepisternum entirely yellow or with ventral half light brownish. Scutellum brownish, with 4 long setae. Laterotergite yellowish to brownish.

Mediotergite yellowish to brownish, bare. Wing. Length 2.7–3.7 mm. Wing hyaline. Sc ending in R 1 slightly distad or proximad of middle of small cell, Sc 1 missing. Apical part of Sc bearing 1–6 small setae. Small cell 1.5– 2 x as long as wide. Cu fork distinctly distal to M fork. M ratios: 0.87–1.14, 1.30–1.56. Cu ratios: 1.00– 1.07, 1.56–1.74. Small setae: M petiole: 0; M 1: 0; M 2: 0; Cu petiole: 0; Cu 1: 0; Cu 2: 0. Halter pale yellowish, apex brownish. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt 1:t 1 = 0.79–0.82, bt 2:t 2 = 0.66–0.67, bt 3:t 3 = 0.53–0.60. Abdomen. Brownish. Hypopygium. Figs. 1 View FIGURE 1 A–F, yellowish. Tergite 9 with two pairs of combs. Outer combs widely separated from each other, both with 10–12 spines ( Fig. 1 View FIGURE 1 A). Tergal lateral appendage long, about 6 x as long as its width, curved and setose, its apex with some curved, flattened setae ( Fig. 1 View FIGURE 1 D). Sternal submedian filament missing ( Fig. 1 View FIGURE 1 B). Gonostylus about 5 x as long as its width, with 5 subapical-apical teeth and membranous lateral lobe about ½ of length of main branch of gonostylus ( Fig. 1 View FIGURE 1 E). Aedeagus deeply bilobed ( Figs. 1 View FIGURE 1 B, 1 F).

Discussion. Mycomya apoensis belongs to the almost cosmopolitan subgenus Mycomyopsis , based on the presence of the long, setose tergal lateral appendages, the pairs of combs in the tergal part of the hypopygium, and the sternal synsclerite divided into two lateral parts bearing no lateral appendages ( Väisänen 1984 a). Its long, curved tergal lateral appendage ( Fig. 1 View FIGURE 1 D) resembles those of M. jeti Väisänen (2013 c: fig. 10 C) M. minutata Edwards, 1931 ( Fig. 3 View FIGURE 3 D), and M. ducula Väisänen (2013 c: fig. 8 C) . Mycomya jeti has a short, almost straight sternal submedian filament ( Väisänen 2013 c: figs. 10 B, 10 D), whereas in M. apoensis the sternal submedian filament is missing ( Fig. 1 View FIGURE 1 B). Mycomya minutata ( Fig. 3 View FIGURE 3 E) and M. ducula ( Väisänen 2013 c: fig. 8 D) have a short curved spur in their gonostyli, while M. apoensis lacks the spur ( Fig. 1 View FIGURE 1 E).

Etymology. The species is named after Mount Apo, its type locality.