Corynoneura confidens, 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 : 6-7

Corynoneura confidens sp. n.

( Figs 3 A–E)

Type material: Holotype male (BDN No. 13103), P. R. CHINA: Sichuan Province, Kangding County, Wasigou, 30°03'N, 101°58'E, alt. 2560 m, light trap, 15.vi.1996, Xinhua Wang.

Etymology. From Latin, confidens , trusting, bold, referring to the stout ultimate flagellomere.

Diagnostic characters. The species can be separated from other members of the genus by having AR of 0.16, inferior volsella reduced, and phallapodeme not extending beyond posterior margin of tergite IX.

Description

Male (n = 1).

Total length 1.16 mm. Wing length 0.70 mm. Total length / wing length 1.65. Wing length / length of profemur 3.4.

Coloration: Head dark brown. Antenna and palp yellow. Thorax brown. Legs yellowish-brown. Tergites I–V yellow, tergites VI–IX brown. Wings light yellow to hyaline with pale yellow clava.

Head: Antenna ( Fig. 3 B) with 10 flagellomeres; ultimate flagellomere stout, 55 µm long, with short sensilla chaetica subapically, apex distinctly swollen, 80 µm long; AR 0.16. Tentorium ( Fig. 3 E) 115 µm long, 15 µm wide. Stipes 55 µm long. Cibarial pump slightly incurved. Palpomeres lengths (in µm):13; 13; 20; 15; 50. Palpomere 2, 3 and 4 ellipsoid, 5 long and broad. Palpomere 5/ 3: 2.5.

Thorax: Dorsocentrals more than 3, prealars 3, supraalar 1. Scutellum with 2 setae.

Wing ( Fig 3 A): VR 3.2. C length 170 µm, C / wing length 0.24. Cu length 420 µm. Cu / wing length 0.6. Wing width / length 0.46. C with 7–8 setae.

Legs: Spur of fore tibia 15 µm long, of mid tibia 8 µm long, and of hind tibia 23 µm long. Apex of fore tibia 15 µm wide, of mid tibia 15 µm, of hind tibia 35 µm. Apex of hind tibia expanded, with comb of 12 setae, one seta near spur strongly S-shaped. Lengths and proportions of legs as in Table 1.

TABLE 1. Lengths (in µm) and proportion of leg segments of Corynoneura confidens sp. n., male.

fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 205 250 130 70 35 20 30 0.52 3.8 3.5 2.0 p2 295 275 155 73 38 18 28 0.56 4.7 3.7 1.8 p3 238 260 143 78 33 15 25 0.55 4.3 3.5 2.3 Hypopygium ( Figs 3 C–D): Anal point absent. Tergite IX with posterior margin almost straight. Laterosternite IX with 1 long seta. Superior volsella narrow. Inferior volsella inconspicuous. Sternapodeme inverted V-shaped; coxapodeme 23 µm long; attachment point with phallapodeme placed in caudal third of lateral sternapodeme and directed caudally, phallapodeme 65 µm long, strongly curved with projection for joint with sternapodeme placed pre-laterally, not extending beyond posterior margin of tergite IX, with projection basally. Gonocoxite 63 µm long, with 1 seta apically. Gonostylus simple, 25 µm long; megaseta 3 µm long. HR 2.7, HV 4.6.

Figures

FIGURE 3. Corynoneura confidens sp. n., male. A. Wing. B. Antenna. C. Hypopygium, dorsal view. D. Hypopygium, ventral view. E. Tentorium.