Cryptotendipes nodus, Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005

Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, Zootaxa 1086, pp. 1-24 : 7-9

Cryptotendipes nodus sp. n. ( Fig. 3 A–C)

Type material: Holotype male, CHINA: Hainan Province: Bawangling, light trap, 11.V.1988, X. Wang (BDN no. 1511). Paratype: 1 male, same data as holotype. 1 male, CHINA: Hubei Province, Shennongjia Mountain Natural Conservation, 2.XI.2003, B. Ji.

Etymology: The species name is from Latin nodus , swelling, in reference to the anal point with an apical swelling, which is unique within the genus.

Diagnostic characters: The species is closely related to C. tobatertius Kikuchi et al., 1990 from Indonesia, but can be differentiated by the absence of frontal tubercles, the presence of sensilla chaeticae, the inner margin of the gonostylus with a slight projection bearing long setae, the superior volsella with 3 apical setae and without distal lateral setae, and an apically swollen anal point.

Male imago (n = 3, unless otherwise stated)

Total length 2.08–3.33, 2.69 mm. Wing length 1.02–1.63, 1.32 mm. Total length/wing length 2.04. Wing length/length of profemur 2.32–2.51, 2.44.

Coloration: Thorax yellowish brown, scutellum and dorsum of scutum light yellow. Abdomen yellowish green. Front legs dark brown except basal 1/2 of femora yellowish brown; mid and hind legs yellowish green except tarsi V.

Head: AR 1.54–1.94, 1.74. Ultimate flagellomere 400–670, 503 µm long. Frontal tubercles weakly developed, 5 µm in diameter. Temporal 8–10, 9 setae, including 1–3, 2 inner verticals, 3–4, 4 outer verticals, and 3–5, 4 postorbitals. Clypeus with 7–14, 10 setae. Tentorium 97–130, 112 µm long, 20–25, 23 µm wide. Palpomere lengths (in µm): 45–48, 47; 68–75, 73; 168–212, 188; 168–215, 187; 240–297, 267. Palp segments 5th/3rd 1.74–1.86, 1.80.

Thorax: Antepronotals with 1 seta, acrostichals 2, dorsocentrals 6–9, 7, prealars 3. Scutellum with 3–5, 4 setae.

Wing ( Fig. 3 A): VR 1.18–1.28, 1.22. R with 0–2, 1 seta, R1 bare, R4+5 with 1–2, 2 setae. Brachiolum 2 setae. Squama with 1–5, 3 setae. Anal lobe well developed.

Legs: Front tibia with 1–2 subapical setae, 70–72, 71 µm and 75 µm long, spurs of middle tibia 17–20, 18 µm and 10–23, 16 µm long, comb with 10–17, 13 teeth, 8–10, 9 µm long; spurs of hind tibia 18–20, 19 µm and 15–25, 19 µm long, comb with 14–21, 18 teeth, 10–12, 11 µm long. Tarsus 1 of mid leg with 5–7, 6 sensilla chaetica in distal 1/3. Lengths (in µm) and proportions of legs as in Table 3 .

Hypopygium ( Fig. 3 B, C): Tergite IX acutely angular medially without long setae in central portion. Anal point 78–92, 87 µm long, 12–25, 18 µm wide at base, 5–13, 10 µm wide at apex, with ridges at base of anal point extending to tergite IX widest at base, tapering towards middle, parallel­sided in distal half, apically strongly swollen and rounded, with 12–18, 14 lateral setae medially. Laterosternite IX with 2 setae. Anal tergite bands V­shaped, separate medially with some lateral microtrichia. Phallapodeme 55–57 (2) µm long. Sternapodeme forming anterior sharp angle without transverse sternapodeme. Superior volsella 30–34, 32 µm long, 6–8, 7 µm wide, with 3 long apical setae and without microtrichia. Gonocoxite 63–100, 79 µm long, gonostylus 105–133, 122 µm long. Inner margin of gonostylus with a basal slight projection with 8–10, 9 long setae. HR 0.59–0.75, 0.65; HV 1.98–2.50, 2.18.

Distribution: The species was found in Oriental China (Hainan and Hubei Province).

Figures

FIGURE 3. Cryptotendipes nodus sp. n. A. Wing. B. Dorsal view of hypopygium. C. Ventral view of hypopygium.

Tables

TABLE 3. Lengths (µm) and proportion of legs of Cryptotendipes nodus sp. n., male (n = 3).

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR
p1	440­650, 537	290­430, 387	510­790, 637	240­390, 313	190­280, 230	120­190, 150	70­105, 85	1.69­1.84, 1.76
p2	400­610, 503	350­540, 443	170­270, 220	100­160, 127	75­120, 95	55­80, 67	50­70, 61	0.49­0.50, 0.50
p3	450­670, 560	440­660, 547	260­410, 340	150­240, 197	135­200, 168	80­120, 100	60­80, 70	0.59­0.65, 0.62