Corynoneura latusatra, 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: 21-23

publication ID

http://doi.org/ 10.5281/zenodo.191288

persistent identifier

http://treatment.plazi.org/id/03BE87F2-FFA7-C620-78D9-FD12FA885ED5

treatment provided by

Plazi

scientific name

Corynoneura latusatra
status

sp. n.

Corynoneura latusatra   sp. n.

( Figs 12 View FIGURES 12 A –E)

Type material: Holotype male (BDN No. 22248), P. R. CHINA: Guizhou Province, Daozhen County, Dashahe, 29 °00'– 29 ° 13 'N, 107 ° 22 '– 107 ° 48 'E, alt. 1.300–1.900 m, sweep net, 25.v. 2004, Hongqu Tang. Paratypes: 8 males, Guizhou Province, Daozhen County, Dashahe, 29 °00'– 29 ° 13 'N, 107 ° 21 '– 107 ° 47 'E, alt. 1.300–1.900 m, sweep net, 25.v. 2004, Hongqu Tang.

Etymology. From Latin, latus, broad, wide; and atra, black, referring to the antenna being expanded and black distally

Diagnostic characters. Similar to C. secunda   in having sternapodeme inverted strongly V-shaped, and phallapodeme well developed and strongly curved, but the two species can easily be separated as C. latusatra   has 7 flagellomeres and an AR of 0.31.

Description.

Male (n = 9).

Total length 0.78–0.91, 0.85 mm. Wing length 0.55–0.60, 0.51 mm. Total length / wing length 1.2–1.59, 1.42. Wing length / length of profemur 3.14–3.43, 3.30.

Coloration: Head yellowish brown with brown frontal vertex. Antenna pale yellow with black apex, palpomere pale yellow. Thorax pale brown to hyaline with vittae, scutum, scutellum and postnotum brown, anterior anepisternum II, preepisternum, epimeron II light brown. Tergites I –IV yellow, tergites V –IX brown. Legs yellow. Wing yellowish to hyaline.

Head: Antenna ( Fig. 12 View FIGURES 12 B) with 7 flagellomeres; ultimate flagellomere 53 –60, 57 µm long, antenna with rosette of apical sensilla chaetica, apically expanded, thickening 50 –56, 53 µm long, with maximum width 18 –25, 20 µm; AR 0.28–0.33, 0.31 (7). Clypeus with 8 –12, 9 (6) setae. Tentorium ( Fig. 12 View FIGURES 12 E) 93 –105, 97 µm long. Stipes 40 –50, 45 µm long. Palpomeres length (in µm): 10 –15, 12; 10 –15, 13; 13 –18, 14; 13 –20, 15; 28 – 38, 35. Palpomere 2, 3 and 4 ellipsoid, palpomere 5 rectangular, Palpomere 5 / 3: 1.7 –3.0, 2.5.

Thorax: Dorsocentrals 3 –5, 4 (5), prealars 2 –5, 3. Scutellum with 1 –2, 1 setae.

Wing ( Fig. 10 View FIGURE 10 A): VR 2.9–3.6, 3.2. C length 120–150, 140 µm, C / wing length 0.22–0.25, 0.24. Cu length 295–330, 321 µm. Cu / wing length 0.54–0.58, 0.56. Wing width / wing length 0.4–0.43, 0.42. C with 3 setae. Legs: Spurs of fore tibia 13 –20, 16 µm and 9 –15, 11 (5) µm long, spurs of mid tibia 6 –10, 8 (7) µm and 5 –8, 6 (3) µm long, and of hind tibia 25 –30, 27 µm and 23 (2) µm long. Width at apex of fore tibia 13 –20, 15 µm, of mid tibia 10 –18, 13 µm, of hind tibia 28 –33, 30 µm. Apex of hind tibia expanded, with comb of 14 –17, 15 setae and one hook-like seta near spur. Lengths and proportions of legs as in Table 5.

Hypopygium ( Figs 10 View FIGURE 10 C –D): Tergite IX large, covering almost the whole gonocoxite, with weakly bilobed posterior margin, and many short setae. Laterosternite IX with 1 long seta. Superior volsella narrow. Inferior volsella absent. Sternapodeme inverted strongly V-shaped, apically acute, 63 –68, 65 (6) µm long; coxapodeme 13 –20, 15 (6) µm long; attachment point with phallapodeme placed in caudal third of lateral sternapodeme and directed caudally; phallapodeme well developed, strongly curved with projection for joint with sternapodeme placed pre-lateral, not extending beyond tergite IX, 85 –90, 86 µm long, 8 –13, 10 (6) µm wide. Gonocoxite 45 –55, 50 µm long, with 2 setae apically. Gonostylus strongly curved, 18 –25, 20 µm long; megaseta 5 –8, 6 µm long. HR 2–2.9, 2.3, HV 3.4–4.4, 3.9 (6).

TABLE 5. Lengths (in µm) and proportion of leg segments of Corynoneura latusatra   sp. n., male.

fe ti ta 1 ta 2 ta 3 ta 4

p 1 165–185, 176 213–235, 226 95–105, 101 45 –58, 51 20 –35, 22 18 –23, 20 p 2 223–245, 234 203–233, 218 108–120, 115 50 –58, 54 25 –30, 28 15 –20, 18 p 3 175–200, 192 155–225, 208 88 –103, 98 48 –58, 54 20 –25, 23 13 –18, 14 ta 5 LR BV SV BR

p 1 25 –30, 28 0.43–0.47, 0.45 3.6–4.5, 3.9 3.8–4.2, 3.9 1.3–1.8, 1.5 p 2 25 –28, 26 0.52–0.55, 0.53 4.4–4.7, 4.5 3.8–4.1, 4.0 1.2–1.5, 1.3 p 3 23 –30, 26 0.43–0.58, 0.48 3.7–4.6, 4.1 3.7–4.3, 4.0 0.9–1.2, 1.0