Corynoneura fujiundecima Sasa

Fu, Yue, Saether, Ole A. & Wang, Xinhua, 2009, Corynoneura Winnertz from East Asia, with a systematic review of the genus (Diptera: Chironomidae: Orthocladiinae), Zootaxa 2287, pp. 1-44 : 10

Corynoneura fujiundecima Sasa

( Figs 5 A–C)

Corynoneura fujiundecima Sasa, 1985: 130 .

Material examined. Male holotype (no. 90: 81), Japan, Honshu, Yamanashi Prefecture, Lake Yamanaka, sweep net, 13.v.1983, M. Sasa.

Diagnostic characters. The species can be separated from other members of the genus by having an antenna with 12 flagellomeres, AR 0.62–0.70; superior volsella not clear, nearly fused with the gonocoxite, and inferior volsella broad. Posterior margin of tergite IX almost straight, sternapodeme inverted U-shaped.

Additional description and corrections. Scutellum and postnotum brown, abdominal tergites yellowish brown while the original description Sasa (1985) mentions scutellum and postnotum entirely black, abdominal tergites I–V yellowish brown, VI to hypopygium dark brown. "R1, R2+3 and R4+5 fused and shortened" should be corrected to "R1, R2+3 and costa fused."

Some additional characters should be added: Total length 1.86–2.13 mm. Wing length 1.14–1.24 mm. Antenna 12 flagellomeres, AR 0.62–0.70. Wing width / wing length 0.35. Clypeus with 10 setae, Tentorium 138 µm long, 23 µm wide. VR 2.7. C length 350 µm, C / wing length 0.31. Cu length 700 µm. Cu / wing length 0.62. Wing width / wing length 0.35. C with 9 setae. Posterior margin of tergite IX almost straight, with several short setae. Sternapodeme inverted U-shaped, coxapodeme 25 µm long, attachment point with phallapodeme placed in caudal position of sternapodeme and caudally directed; phallapodeme short, straight and broad, not extending beyond posterior margin of tergite IX, 50 µm long. Gonocoxite 98 µm long, with 6 long setae apically. Gonostylus 50 µm long; megaseta 10 µm long. HR 1.95, HV 3.25. The wing and hypopygium of holotype are redrawn ( Figs 5 A–C).

Distribution. Japan.

Figures

FIGURE 5. Corynoneura fujiundecima Sasa, 1985, male. A. Wing. B. Hypopygium, dorsal view. C. Hypopygium, ventral view.