Corynoneura macdonaldi, 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 : 23-25

Corynoneura macdonaldi sp. n.

( Figs 13 A–E)

Type material: Holotype male (BDN No. 12635) P. R. CHINA: Sichuan Province, Ganzi State, Yajiang County, 31°38'N, 99° 58'E, alt. 2000m, light trap, 14.vi.1996, Xinhua Wang.

Etymology. Named after McDonald's hamburger stores, whose brand like “M” resembles the M-shaped sternapodeme.

Diagnostic characters. The species is similar to C. lobata in having antenna with 10 flagellomeres and AR about 0.35, but can easily be separated by the subrectangular inferior volsella with round corner; and the inverted M-shaped sternapodeme.

Description

Male (n = 1).

Total length 1.05 mm. Wing length 0.80 mm. Total length / wing length 1.30. Wing length / length of profemur 3.27.

Coloration: Head dark brown. Antenna and palpomere yellow. Thorax brown with yellow anterior anepisternum II. Legs yellowish brown. Tergites I–V yellow, tergites VI–IX brown. Wings yellowish to hyaline, with pale yellow clava.

Head: Antenna ( Fig. 13 B) with 10 flagellomeres; ultimate flagellomere 113 µm long, apex with rosette of apical sensilla chaetica, slightly expanded apically. AR 0.36. Clypeus with 9 setae. Tentorium ( Fig. 13 E) 118 µm long, 18 µm wide. Stipes 45 µm long. Palpomeres length (in µm): 13; 13; 18; 20; 53. Palpomere 2, 3 and 4 ellipsoid, 5 long. Palpomere 5/ 3: 3.0.

Thorax: Dorsocentrals 5.

Wing ( Fig. 13 A): VR 3.2. C length 190 µm, C / wing length 0.24. Cu length 450 µm. Cu / wing length 0.56. Wing width / wing length 0.43. C with 5 setae.

Legs: Spur of fore tibia 20 µm long, of mid tibia 8 µm long, and of hind tibia 15 µm long. Width at apex of fore tibia 20 µm, of mid tibia 15 µm, of hind tibia 38 µm. Apex of hind tibia expanded, with comb of 16 setae, one seta near spur strongly S-shaped. Lengths and proportions of legs as in Table 6.

Hypopygium ( Figs 13 C–D): Tergite IX large, almost covering gonocoxite. Posterior margin of tergite IX slightly bilobed, with 4 setae on each side; laterosternite IX with 1 long seta. Superior volsella broad, partly united with inferior volsella. Inferior volsella subrectangular, with round corners. Sternapodeme inverted Mshaped; coxapodeme 25 µm long, small attachment point with phallapodeme placed in caudal position of sternapodeme and ventrally directed; phallapodeme short, weakly curved, 24 µm long, with medial projection. Gonocoxite 70 µm long with 2 setae apically. Gonostylus slender, 28 µm long, with single setae near apex; megaseta 3 µm long. HR 2.5, HV 3.8.

fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 233 290 155 80 50 25 28 0.53 3.7 3.4 1.7 p2 330 280 193 83 40 20 28 0.69 4.7 3.2 2.2 p3 265 280 155 80 38 23 30 0.55 4.1 3.5 2.0

Figures

FIGURE 13. Corynoneura macdonaldi sp. n., male. A. Wing. B. Antenna. C. Hypopygium, dorsal view. D. Hypopygium, ventral view. E. Tentorium.