Corynoneura inefligiata, Fu, Yue, Saether, Ole A. & Wang, Xinhua, 2009

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 : 13-15

Corynoneura inefligiata sp. n.

( Figs 7 A–E)

Corynoneura yoshimurai Wang, 2000: 635 not Tokunaga 1936.

Type material: Holotype male (BDN no. 03375), P. R. CHINA: Liaoning Province, Kuandian County, 40°45'N, 124°46'E, alt. 400–1336 m, light trap, 22.ix.1992, Xinhua Wang.

Etymology. From Latin, inefligiata , formless, shapeless, referring to the large, broad inferior volsella with dented edge.

Diagnostic characters. Similar to C. yoshimurai in coloration and in having antenna with 10 flagellomeres, but can be separated by the weak anal lobe of wing, phallapodeme with small inner projection and the broad inferior volsella with dented edge.

Description

Male (n = 1).

Total length 1.45 mm. Wing length 0.88 mm. Total length / wing length 1.65. Wing length / length of profemur 3.45.

Coloration: Head dark brown. Antenna and palpomere yellow. Thorax brown. Abdominal segments yellow to brown. Legs yellowish brown. Wings light yellow to hyaline.

Head: Antenna ( Fig. 7 B) with 10 flagellomeres; ultimate flagellomere 130 µm long; apex with rosette of short sensilla chaetica; apically expanded, thickening 70 µm long, 30 µm wide; AR 0.43. Clypeus with 6 setae. Tentorium ( Fig. 7 E) 125 µm long, 25 µm wide. Stipes 50 µm long. Palpomere lengths (in µm): 15; 13; 18; 25; 50. Palpomere 2 and 3 ellipsoid, 4 rectangular, 5 long and slender. Palpomere 5 / 3: 2.86.

Thorax: Damaged.

Wing ( Fig. 7 A): Anal lobe weak. R4+5 clearly separate from M 1 in full length. VR 3.4. C length 220 µm. Cu / wing length 0.6. Wing width / length 0.44. C with 7 setae.

Legs: Spur of fore tibia 27 µm long, spurs of mid tibia 10 and 13 µm long, and of hind tibia 30 µm long. Width at apex of fore tibia 20 µm, of mid tibia 20 µm, and of hind tibia 38 µm. Apex of hind tibia expanded, with comb of 12 setae and one hook-like seta near spur. Lengths and proportions of legs as in Table 3.

Hypopygium ( Figs 7 C–D): Posterior margin of tergite IX straight. Anal point absent. Inferior volsella large and broad with dented edge. Sternapodeme inverted U-shaped, attachment point with phallapodeme placed in caudal position of sternapodeme and ventrally directed; phallapodeme weakly curved, not extending beyond posterior margin of tergite IX, with small inner projection. Gonocoxite 70 µm long. Gonostylus slightly curved apically, 35 µm long; megaseta 3 µm long. HR 2.0, HV 4.1.

TABLE 3. Lengths (in µm) and proportion of leg segments of Corynoneura inefligiata sp. n., male.

fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 255 325 158 93 60 30 35 0.49 3.0 3.7 2.0 p2 370 340 195 93 50 23 35 0.57 4.5 3.6 1.6 p3 300 360 193 110 45 25 35 0.54 3.8 3.4 1.5

Figures

FIGURE 7. Corynoneura inefligiata sp. n., male. A. Wing. B. Antenna. C. Hypopygium, dorsal view. D. Hypopygium, ventral view. E. Tentorium.