Ophiomyia flagellata , Sasakawa, Mitsuhiro, 2013

Sasakawa, Mitsuhiro, 2013, Thailand Agromyzidae (Diptera) — 2, Zootaxa 3746 (4), pp. 501-528: 523-525

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Ophiomyia flagellata

sp. nov.

Ophiomyia flagellata  sp. nov.

( Figs 46–48View FIGURES 46 – 56)

Type material. Holotype male (QSBG), Phetchabun, Khao Kho National Park, 16 ˚ 52.573 ´N, 101 ˚08.077´E, 520 m a.s.l., 26 x – 2 xi 2006, Malaise trap, Somchai Chatchumnan & Sa-ink Singtong. Paratypes: 2 ♂, same data as holotype.

Diagnosis. Shining black; calypter with fringe black; facial carina narrow, extending ventrally to oral margin; vibrissal fasciculus lacking; sursrtylus with about 28 spines in anteroventral corner; basiphallus with lateral sclerites joined basally by a ventral bridge, distiphallus with a whip-like process on left side.

Description. MALE. Black; ocellar triangle and facial carina shining; lunule brown-tinged; mesoscutum and abdomen strongly shining. Wing hyaline; calypter brownish gray, with margin and fringe black.

Frons slightly wider than eye, converging ventrally; parafrontalia not projecting above eye in profile; ors and ori each two, oh rather long, reclinate; ocellar triangle with ventral tip pointed sharply, extending to level of second ors; lunule lower than semicircle; face with carina distinct, narrowly raised below bases of antennae, extending ventrally to oral margin; eye about 1.2 times as high as wide; gena 1 / 6 – 1 / 7 as high as eye; vi normal. First antennal flagellomere round, wider than genal height; arista almost as long as eye width, microscopically pubescent.

Mesoscutum with 0+ 2 dc, eight rows of acr. Wing 1.8–2.2 (1.8) mm long; costa extending to M 1, with three sections in proportion of 29–31: 8: 7; r-m beyond midpoint of discal cell (8: 4–5); M 1 ratio 4.5 –6.0; ultimate section of CuA 1 1 / 2–3 / 4 as long as penultimate section (10–15: 22).

Epandrium with surstylus slightly projected anteriorly, bearing 27 or 28 spines and many long setae in anteroventral corner; cercus narrow, 2 / 3 as high as epandrium, with a row of five to seven stout setae anteroventrally. Hypandrium 220 µm long, without basal apodeme. Phallapodeme 530 µm long; phallus 360–370 µm long, basiphallus with narrow lateral sclerites joined by a bridge extending from midpoint of the left sclerite towards base of the right, distiphallus with two lobes laterally and a whip-like process on left lobe. Ejaculatory apodeme 180 µm long, blade asymmetrically expanded, 90 µm wide.

Body length 1.8 –2.0 mm.

FEMALE. Unknown.

Distribution. Thailand.

Remarks. The coloration, wing length and characteristic form of the basiphallus of this species are somewhat similar to those of Ophiomyia centrosematis  , but in the new species the facial carina is distinct, and the distiphallus bears a whip-like process on the left lobe; in O. centrosematis  , the facial carina is quite absent, the basiphallic sclerites are isolated except for their base, and the distiphallic lobes are spinulose.

Etymology. The specifc name refers to the whip-like (Latin: flagellatus) process on the distiphallus.