Melanagromyza turgida Sasakawa, 2013, sp. nov.

Melanagromyza turgida sp. nov.

(Figs 40–42)

Type material. Holotype male (QBSG), Chaiyaphum, Tat Tone National Park, 15˚58.344´N, 102˚02.169´E, 257 m a.s.l., 26 viii–5 ix 2006, Malaise trap, Tawit Jaruphan & Orawan Budsawong. Paratypes: 2♀, same data as holotype.

Diagnosis. Black; mesoscutum and abdomen strongly shining coppery; calypter with fringe whitish; frons narrow; surstylus with about 28 spines in 3–4 rows; phallus with basal membranous part swollen by ventral extension of basiphallic sclerite, distiphallus with spinulose patch at middle of lateral side.

Description. MALE. Black; ocellar triangle shining; parafrontalia weakly shining; lunule and arista brown; mesoscutum moderately and abdomen strongly shining coppery. Wing hyaline; calypter white, with margin yellow, fringe yellowish white.

Frons almost as wide as eye, converging ventrally; parafrontalia slightly projecting above eye in profile, bearing two ors and two ori, second ori short; oh reclinate, in row; ocellar triangle with ventral tip extending beyond level of second ors; lunule semicircular; eye 1.3 times as high as wide, bare; gena 1/6–1/7 as high as eye; pm five or six. Antennae narrowly separated at base, first flagellomere orbicular, arista slightly shorter than eye height, pubescent.

Mesoscutum with 0+2 dc, eight rows of acr before transverse suture but six rows behind that. Wing 2.0 mm long; costa extnding to M1, with three sections in proportion of 29:10: 7; r-m slightly beyond midpoint of discal cell; M1 ratio 3.4; ultimate section of CuA1 3/4 as long as penultimate section. Mid tibia with one or two pd.

S6 nearly twice as long as S5, 2/3 as long as wide, with shallow emagination posteriorly. Surstylus slightly projected ventrally, incurved, bearing 26–30 spines in 3–4 rows along ventral margin; cercus slightly longer than 2/ 3 of epandrial height. Hypandrium 250 µm long, with apodeme about 1/3 as long as sidearm. Phallapodeme 420 µm long; phallus 300 µm long, basiphallus with sclerites extremely expanded ventrally and distally, mesophallus almost as long as distiphallus and with distal tube curled, distiphallus with spinulose patch at middle of dorsolateral side and distal tube slightly broadened distally; ejaculatory apodeme 160 µm long, blade narrow, expanded asymmetrically, 75 µm wide.

FEMALE. Similar to male, but ovipositor sheath brown; frons 1.2 times as wide as eye; wing length 2.2 mm.

Distribution. Thailand.

Remarks. This species also belongs to the albisquama -group, and its distiphallus is somewhat similar to that of Melanagromyza spinuliloba sp. nov. in having the spinulose patch on the distiphallus. But, the expanded basiphallic sclerites of this species are unique among the congenerous species.

Etymology. The specifc name refers to the swollen (Latin: turgidus) basiphallic membrane.