Thienemannimyia galbina, Cheng, Ming & Wang, Xinhua, 2009

Cheng, Ming & Wang, Xinhua, 2009, Thienemannimyia Fittkau (Diptera: Chironomidae) from China, Zootaxa 2074, pp. 50-60 : 54-56

Thienemannimyia galbina sp. n.

( Figs 14–16 )

Type material. Holotype male, China: Fujian Province, Wuyishan City, Wuyi Mountain Natural Conversation, Sangan, 24.iv.1993, light trap, X.H. Wang (BDN No. 0 2260). Paratype: 1 male, China: Sichuan Province, Shimian County, Nanya River, 16.vi.1996, light trap, X.H. Wang (BDN N0. 11728). Etymology. The species name, from Latin galbinus, yellow, refers to the colour of the abdomen. Diagnostic characters. The new species can be distinguished from other members of the genus by the yellowish abdomen.

Description. Male (n = 2). Total length 4.60–5.02 mm. Wing length 2.70–2.95 mm. Total length / wing length 1.7–1.7. Wing length / length of profemur 2.16–2.45.

Coloration. Head including antenna brown. Ground colour of thorax brown, black pigmentation confined to the anterior half of the postnotum ( Fig. 15 ). Abdomen including hypopygium yellow. Legs brown. Wing unmarked ( Fig. 14 ).

Head. AR 1.91 (n = 1). Temporal setae 22, including 18 verticals and 4 postorbitals. Clypeus with 43–46 setae. Tentorium 180–200 µm long, 40 µm wide. Length of palpomeres 1–5 (in µm): 70–75, 90–110, 180–235, 235–295, 315–400.

Wing ( Fig. 14 ). VR 0.88–0.95. Brachiolum with 2 long setae. Squama with 40–54 setae. Thorax chaetotaxy. Antepronotals 6; dorsocentrals 32–36, acrostichals 68–70, prealars 30–32, preepisternals 4, scutellars 40–48.

Legs. Spur on fore tibia 60–63 µm long with 10 lateral teeth. Spurs on mid tibia 55–65 and 75–95 µm long with 6 and 9 lateral teeth. Spurs on hind tibia 48–65 and 73–110 µm long, with 6 and 8 lateral teeth. Tibial comb on hind leg with 6 setae. Length of legs segments and leg ratios in Table 2.

fe ti ta1 ta2 ta3 ta4 ta5 LR

p1 1200–1250 1500–1575 1100–1300 650–650 470–480 310–350 170–195 0.73–0.83 p2 1225–1375 1250–1375 740–820 370–420 290–330 220–270 130–150 0.59–0.60 p3 1200–1250 1550–1675 1125–1325 670–750 500–580 320–360 160–175 0.73-0.79 Hypopygium ( Fig. 16 ). Tergite IX straight, with 14–14 setae. Anal point broad. Gonocoxite 213–220 µm long, cylindrical. Gonostylus 170–175 µm long. HR 1.25–1.26; HV 2.70–2.87. Megaseta 10–13 µm long. Female, pupa and larva: unknown.

Remarks. The species was collected in a subtropical mountain area in Fujian and Sichuan province in Oriental China.

Figures

FIGURES 14 – 16. Thienemannimyia galbina sp. n., male. 14 — wing; 15 — thorax; 16 — hypopygium, ventral and dorsal views.