Denopelopia bractea, Cheng, Ming & Wang, Xinhua, 2005

Cheng, Ming & Wang, Xinhua, 2005, Denopelopia Roback & Rutter from China with emendation of the generic diagnosis (Diptera: Chironomidae: Tanypodinae), Zootaxa 1042, pp. 55-63 : 56-58

Denopelopia bractea sp. n. ( Figs. 1–5 )

Type material. Holotype male (BDN No.1455), CHINA: Guangdong Province, Fengkai County, Heishiding Natural Conversation, 20. IV. 1988, light trap, X. H. Wang. Paratypes: 1 male (BDN No. 03406), Gansu Province, Tianshui City, Dangchuan Town, 1450 m, 8. VIII. 1993, light trap, W. J. Bu. 1 male (BDN No.1602), CHINA: Guangxi Autonomous Region, Longsheng County, Sanmen Town, 27. V. 1990, light trap, X. H. Wang. 1 male (BDN No.1591), Guangxi Autonomous Region, Jinxiu County, Luoxiang Town, Daleng village, 7. VI. 1990, sweep net X. H. Wang. 1 male (BDN No.08119), Xizang Autonomous Region, Zayü County, 27. VI. 1988, light trap, C. Y. Deng.

Etymology. The species name is from the Latin bractea , scale, referring to the tibiae of the front legs with two large scale­like setae.

Male imago (n = 5)

Dimensions. Total length 2.23–2.80, 2.56 mm. Wing length 1.42–1.90, 1.65 mm. Total length/wing length 1.45–1.70, 1.55.

Coloration. Head brown. Antenna brown. Thorax dark brown with darker vittae. Abdomen brown. Hypopygium dark brown. Wing without makings.

Head. AR 0.74–1.16, 0.99. Temporal setae uniserial 10–14, 12; including 8–12, 11 verticals and 1–2, 2 postorbitals. Clypeus with 14–26, 19 setae. Palpomere 1–5 lengths (µm): 25–35, 30; 40–78, 57; 115–198, 156; 125–185, 160; 213–310, 264.

Wing ( Fig. 1 ). VR 0.88–0.97, 0.93. Brachiolum with 3–7, 5 long setae. Squama with 9–12, 12 setae. Anal lobe obtuse.

Thorax. Antepronotal setae 2–3, 2. Dorsocentrals 13–23, 18; acrostichals 13–26, 21; prealars 5–8, 6; Scutellars 9–13, 11.

Legs. Spur on fore tibia 23–30, 28 µm long with 3 lateral teeth. Spurs on mid tibia 23–30, 28 µm and 28–43, 36 µm long, with 3 lateral teeth ( Fig. 2 ). Spurs on hind tibia 18–35, 28 µm and 33–55, 45 µm long, with 3 lateral teeth. Tibiae of front legs with 2 large apical spatulate scale­like setae ( Fig. 3 ). Tibial comb on hind leg of 7 setae ( Fig. 4 ). Length (µm) and proportions of legs as in Table 1 . (The fore and mid tarsi of specimen No. 0 8119, mid and hind tarsi of specimen No. 1591, fore tarsi of specimen No. 0 3406, and mid tarsi of specimen No. 1602 are lost).

Hypopygium ( Fig. 5 ). Tergite IX with a row of 8–10, 10 setae. Anterior end of sternapodeme with transverse connection 8–23, 13 µm long. Gonocoxite 125–205, 153 µm long. Length of gonocoxite/width of gonocoxite 1.77–1.98 1.85. Gonostylus 83–125, 102 µm long, slender, and slightly curved. HR 1.45–1.54, 1.50. HV 2.24–2.66, 2.5.

Female, pupa, and larva. Unknown.

Distribution. The species has been found in both Oriental (Guangdong Province, Guangxi Province, and Xizang Autonomous Region) and Palaearctic (Gansu Province) China.

Diagnosis. This new species can be separated from other known species of the genus by having two large spatulate, scale­like setae on the apex of the fore tibiae ( Fig. 3 ).

Figures

FIGURES 1 – 5. Denopelopia bractea sp. n. male imago. 1, wing. 2, both semi­lyrate tibial spurs on mid leg. 3, scale­like setae and short spur on fore tibia. 4, tibial spurs and tibial comb on hind leg. 5, hypopygium.

Tables

TABLE 1. Lengths (µm) and proportions of legs of D. bractea sp. n.

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR
p1	570–710, 640	640–1010, 818	450–660, 530	275–340, 317	200–280, 231	120–210, 167	80–100, 93	0.63–0.80, 0.73
p2	550–820, 692	520–825, 673	440–610	200–275	110–170	90–115	70–75	0.74–0.74
p3	490–730, 616	790–1250, 978	555–820, 706	290–410, 353	210–310, 263	135–230, 179	85–110, 96	0.62–0.82, 0.73