Melanagromyza obtusa (Malloch)

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

Melanagromyza obtusa (Malloch)

( Figs 25–27 )

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.

Figures

FIGURES 19 – 29. Male genitalia of Melanagromyza macilenta sp. nov. (19 – 21, holotype), M. multistriata sp. nov. (22 – 24, paratype), M. obtusa (Malloch, 25 – 27) and M. pandiculata sp. nov. (28 – 29, paratype). See Figs 1 – 18; 29, hypandrium, ventral view of left half.