Thienemanniella nagaramaculata Sasa

(Figs 9 A–C)

Thienemanniella nagaramaculata Sasa, 1989: 68; Yamamoto 2004: 103.

Material examined. JAPAN: Honshu, Gifu Prefecture, Nagara River, light trap, holotype male (No. 170: 96). 25.x.1988, M. Sasa.

Diagnostic characters. The species are separated from other East Asian members of the genus by having hairy eyes, 9 flagellomeres, AR c. 0.8, partly semitransparent tergite IX, superior volsella more or less digitiform (not well visible), small, rounded and caudal inferior volsella.

Emended description. Total length 1.44–1.54 mm, wing length 0.90–0.94 mm. Wing length / length of profemur: 3.0. Antenna with 9 flagellomeres (10 in original description), AR 0.79. Tentorium 125 µm long, 38 µm wide. Palpomeres length (in µm):15, 23, 30, 48, 153. Palpomere 2 ellipsoid, 3 and 4 rectangular, 5 long and slender; palpomeres 5/ 3: 5.1. Tergite IX partly semitransparent. Inferior volsella small and rounded. Transverse sternapodeme narrow, 23 µm long, with oral projections; phallapodeme median concave and slightly curved, 38 µm long. Gonocoxite 85 µm long with 1 long setae apically. Gonostylus 30 µm long, straight, apex with many setae. HR 2.8, HV 4.8.

Distribution. Japan.