Ophiomyia striata , Sasakawa, Mitsuhiro, 2013

Sasakawa, Mitsuhiro, 2013, Thailand Agromyzidae (Diptera) — 2, Zootaxa 3746 (4), pp. 501-528: 526-527

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Ophiomyia striata

sp. nov.

Ophiomyia striata  sp. nov.

( Figs 54–56View FIGURES 46 – 56)

Type material. Holotype male (QSBG), Loei, Phu Kradueng National Park, 16 ˚ 49.099 ´N, 101 ˚ 47.624 ´E, 275 m a.s.l., 14–20 xi 2006, Malaise trap, Suthin Gong-lasae.

Diagnosis. Black; calypter with fringe white; lunule low; facial carina spindle-shaped; gena broad, vibrissal fasciculus distinct; ultimate section of CuA 1 equal to penultimate section in length; surstylus with about eight spines; distiphallus striated distally on lateral side.

Description. MALE. Black; parafrontalia and lunule brown-tinged; ocellar triangle shining; mesoscutum and abdomen moderately shining; wing hyaline, calypter brownish-gray, with fringe whitish.

Frons 1.5 times as wide as eye, converging ventrally; parafrontalia slightly projecting above eye in profile; ors and ori each two; oh reclinate, in row; ocellar triangle with ventral tip blunt, extending beyond level of second ors; lunule narrow, distinctly lower than semicircle, with median furrow; face with carina distinctly raised, forming a spindle below base of antennae; eye 1.2 times as high as wide; gena 1 / 5 as high as eye, projecting forwards, forming angle of 70 ˚ in front; vibrissal fasciculus 3 / 5 as long as srista, with slight upward curvature at base, straight apically. First antennal flagellomere round, with minute pile; arista appearing bare.

Mesoscutum with 0+ 2 dc, ten rows of acr anteriorly but eight rows behind level of anterior dc. Wing 1.8 mm long; costa extending to M 1, with three sections in proportion of 31: 10: 7; r-m at distal 1 / 3 of discal cell (10: 5); M 1 ratio 5.4; ultimate section of CuA 1 equal to penultimate section in length.

S 6 about four times as long as S 5, 1.3 times as wide as long, with posterior emargination on median 1 / 3. Epandrium with surstylus slightly projected, incurved, bearing three apical spines and four or five spinules; cercus small, 2 / 3 as high as epandrium. Hypandrium 280 µm long, with basal apodeme short, about 1 / 5 as long as sidearm. Phallapodeme 560 µm long; phallus 330 µm long, distiphallus striated distally on lateral side and spinulose internally; ejaculatory apodeme 160 µm long, blade very narrow, 35 µm wide.

Body length 2.0 mm.

FEMALE. Unknown.

Distribution. Thailand.

Remarks. On external characters this species resembles Ophiomyia cornuta  , but it is easily distinguished by its broader facial carina, longer ultimate section of CuA 1, and striated distiphallus.

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