Melanagromyza multistriata, Sasakawa, Mitsuhiro, 2013

Sasakawa, Mitsuhiro, 2013, Thailand Agromyzidae (Diptera) — 2, Zootaxa 3746 (4), pp. 501-528 : 513-515

Melanagromyza multistriata sp. nov.

( Figs 22–24 )

Type material. Holotype male (QBSG), Phetchabun, Khao Kho National Park, 16˚52.581´N, 101˚08.060´E, 520 m a.s.l., 19–26 x 2006, Malaise trap, Somchai Chatchumnan & Saink Singtong. Paratypes: 3♂, 5♀, same locality and collectors as holotype, 12–19 & 19–26 x 2006.

Diagnosis. Black, wing length 1.9–2.2 mm; ocellar triangle large; mesoscutum and abdomen shining coppery; calypter with fringe white; crossvein r-m only a little beyond midpoint of discal cell; surstylus with 26 spines in four rows; basiphallic sclerites separated in both ends, distiphallus densely striated longitudinally.

Description. MALE. Black; ocellar triangle shining; arista brown; mesoscutum, scutellum and abdomen shining coppery. Wing hyaline, calypter with margin yellow, fringe white.

Frons 1.3 times as wide as eye, slightly converging ventrally; parafrontalia not projecting above eye in profile; ors and ori each two; oh reclinate, in row; ocellar triangle large, with ventral tip extending to level of first ori; lunule semicircular; eye 1.5 times as high as wide, bare; gena 1/6–1/7 as high as eye. First antennal flagellomere rounded apically, wider than genal height; arista almost as long as eye width, pubescent.

Mesoscutum with 0+2 dc, six rows of acr. Wing 1.9–2.2 (2.2) mm long; costa extending to M1, with three sections in proportion of 32–33: 10: 8; r-m almost at or slightly beyond midpoint of discal cell (11–12: 10); M1 ratio 2.5–3.0; ultimate section of CuA1 about 3/5 as long as penultimate section. Mid tibia with two pd.

S6 about thrice as long as S5, deeply incised on posteromedian 2/5. Surstylus slightly projected in posteroventral corner of epandrium, bearing 26 spines in about four rows. Hypandrium 400 µm long, with basal apodeme slightly shorter than 1/3 length of sidearm. Phallapodeme 530 µm long; phallus 340 µm long, basiphallus with lateral sclerites isolated and each shortly projected inwardly at middle, mesophallus short but with membranous tube (weakly chitinized on ventral side) distally, distiphallus with dorsal process short, distal tube densely striated longitudinally on lateral side; ejaculatory apodeme 230 µm long, blade slightly expanded asymmetrically, 80 µm wide.

FEMALE. Similar to male externally, wing length 2.0– 2.3 mm.

Distribution. Thailand.

Remarks. This species is distinctive in a peculiar structure of the phallus described above.

Etymology. The specific name refers to the densely striated (Latin: multus + striatus) distiphallus.

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.