Corynoneura longshanensis Fu, 2022

Fu, Yue, Fang, Xiang-Liang, Wang, Xin-Hua, Shen, Mi & Xiao, Yun-Li, 2022, Corynoneura Winnertz species from Hunan Province, Oriental China, delineated with morphological and 16 S rDNA data (Diptera, Chironomidae), ZooKeys 1082, pp. 87-102 : 87

Corynoneura longshanensis Fu sp. nov.

Figure 5

Type material.

Holotype male (HNU: 17091204HJL), China: Hunan Province, Loudi City, Lianyuan County, Longshan National Forest Park, 27°31'20"N, 111°45'23"E, 674 m a. s. l., 26.Ⅶ.2016, sweep net, leg. Jingli Huang.

Etymology.

Named after the type locality.

Diagnostic characters.

The male imago is characterized by having an antenna with seven flagellomeres, AR 0.55; superior volsella undeveloped, and inferior volsella with right-angular corner, fused with the inner margin of gonocoxite; sternapodeme inverted U-shaped; phallapodeme scalpel-like, apical curved, in caudal position of sternapodeme.

Description.

Adult male (N = 1). Total length 0.92 mm. Wing length 0.45 mm. Total length/wing length 2.04.

Coloration. Head and thorax brown, legs and abdomen yellowish.

Head. Antenna with seven flagellomeres, AR 0.55, ultimate flagellomere 89 µm long, ultimate flagellomere distinctly expanded apically, with about 10 apical sensilla chaetica (Fig. 5D ). Tentorium and cibarial pump as in Figure 5B , tentorium 96 µm long; 10 µm wide. Anterior margin of cibarial pump strongly concave. Length of palpomeres (in µm): 10; 12; 12; 17; 24. Palpomere 5/3 ratio: 2.0.

Thorax. Five dorsocentral setae. Scutellum with two setae.

Wing (Fig. 5A ). VR 3.1. Cu/wing length 0.51; Costa 100 µm long, with five setae; Cu 230 µm long; wing width/wing length ratio 0.47.

Legs. Fore legs lost. Spurs of mid tibia 5 µm and 8 µm long, and spurs of hind tibia 19 µm and 10 µm long. Width of mid tibia at apex 14 µm, of hind tibia (a) 29 µm. Width of hind tibia 1/3 from apex (d) 14 µm, elongation length (b) 36 µm, length of maximum thickening (c1) 60 µm, total length of thickening (c2) 79 µm; hind tibial ratios: a/d 2.07; b/d 2.57, 2.10; c1/d 4.29; c2/d 5.64. Apex of hind tibia obvious expanded, with comb of 16 setae, with S-shaped spur (Fig. 5C ). Lengths and proportions of legs as in Table 5 .

Hypopygium (Fig. 5E, F ). Tergite IX medially slightly incurved. Superior volsella rounded. Inferior volsella with right-angled corner, fused with inner margin of gonocoxite. Phallapodeme 29 µm long, scalpel-like, apex curved, in caudal position of sternapodeme. Transverse sternapodeme 17 µm wide, with small oral projection, inverted U-shape. Gonostylus medially broadened, curved, tapering, 17 µm long; megaseta 5 µm long. HR 2.82; HV 5.40.

Remarks.

This new species is similar to Corynoneura hortonensis Fu & Sæther, 2012 by having the same shaped sternapodeme and phallapodeme. The new species can be separated from the latter by the broad and thick transverse sternapodeme, and the median part of the gonostylus expanded with a rugged inner edge.

Figures

Figure 5. Corynoneura longshanensis sp. nov., male imago. A wing B tentorium and cibarial pump C hind tibial apex D antenna E hypopygium, dorsal view F hypopygium, ventral view.