Melanagromyza obtusa (Malloch),

Sasakawa, Mitsuhiro, 2013, Thailand Agromyzidae (Diptera) — 2, Zootaxa 3746 (4), pp. 501-528: 515

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Melanagromyza obtusa (Malloch)


Melanagromyza obtusa (Malloch) 

( Figs 25–27View FIGURES 19 – 29)

Agromyza obtusa Malloch, 1914: 323  .

Melanagromyza obtusa: Hennig, 1941: 174  . Melanagromyza weberi Meijere, 1922: 20  .

Material examined. 1 ♂, 2 ♀, Loei, Phu Ruea National Park, 17 ˚ 29.907 ´N, 101 ˚ 20.483 ´E, 1195 m a.s.l., 5–12 viii 2006, Malaise trap, Nukoonchai Jaroenchai; 1 ♀, Phetchabun, Khao Kho National Park, 16 ˚ 32.546 ´N, 101 ˚02.501´E, 274 m, 5–12 xi 2006, Malaise trap, Somchai Chachumnan & Saink Singtong.

Remarks. This black species is characterized by the shining coppery-greenish mesoscutum and abdomen, a whitish fringe on the calypter, a large ocellar triangle with the ventral apex obtuse and extending almost to the dorsal margin of the lunule, and a long phallapodeme and phallus; wing length 2.2–2.7 mm in male. Larva is known as a seed-feeder in young pods of Cajanus  , Phaseolus  , Vigna  spp., etc. (Leguminosae).

Description. The male genitalia are described below in detail: epandrium with a spine in inner posteroventral corner (as seen in M. cirrappendicula  ) and a long spine mesal to that; surstylus projected roundly on anteroventral part of epandrium, bearing 15–17 spines in two irregular rows along distal margin; cercus 2 / 3 as high as epandrium, with a row of five stout setae on anteroventral part; phallic hood 140 µm long, with serrations of minute spinules along lateral margins and a pair of distinct spines before lateral apices; hypandrium 440 µm long, with basal apodeme about 1 / 2 as long as sidearm; pregonite crescent-shaped, with several sensillae; postgonite as long as pregonite, shortly bifurcate at base; phallapodeme 740 µm long; phallus 530 µm long, basiphallic sclerites narrow and extremely long, ending a approximate midpoint of meso+distiphallus; mesophallus with ventral process extending posteriorly on lateral sides of distiphallus; distiphallus with long tube distally and surrounded by spinulose membrane laterally; ejaculatory apodeme 240 µm long, 190 µm wide.

Distribution. Taiwan, Malaysia (Peninsula), Thailand, Indonesia (Java, Irian Jaya), India, Sri Lanka, Papua New Guinea, Australia.