Psectrotanypus varius Fabricius
Creators: name: Cheng, Ming
name: Wang, Xinhua
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Psectrotanypus
Psectrotanypus varius

description: Psectrotanypus varius (Fabricius)
(Figs.7–12)
Tipula varia Fabricius, 1787: 325
Chironomus zonatus Fabricius, 1794
Psectrotanypus brevicalcar Kieffer, 1909: 43. Psectrotanypus diplosis Kieffer, 1919
Psectrotanypus pallescens Vimmer, 1927 Psectrotanypus varius Fittkau, 1962: 134.
Material examined. 2 males (BDN No.05045, 05046), CHINA: Fujian Province, Shanghang County, Buyun Township, 6.V.1993, sweep net, X. H. Wang. 2 males (BDN No. 1597, 1598), Guangxi Autonomous Region, Jinxiu County, Longjunshan Natural Conservation, 4.VI.1990, light trap, X. H. Wang.
Diagnostic characters. The species can be distinguished from other members of the genus by the banded abdomen and the characteristic wing markings with two broad bands darker at the anterior margins and additional spots on the anal lobe and at the apex. The wing length of Chinese specimens (2.65–2.83 mm) is less than the wing length (3.8–4.2 mm) described by Fittkau (1962). In addition, the Chinese specimens differ from specimen described by Fittkau (1962) by having the leg ratio of the front leg smaller than that of the hind leg, whereas the opposite is true for specimens described by Fittkau (1962).
Male imago (n = 4)
Total length 4.43–5.3, 4.97 mm. Wing length 2.65–2.83, 2.72 mm. Total length/wing length 1.67–1.96, 1.83. Wing length/length of profemur 1.98–2.13, 2.06.
Coloration. Head brown. Thorax almost uniformly brown, vittae not distinct. Ground color of abdomen bright brown. Tergites I–V each with anterior brown band and 2 rounded areas in middle; tergites VI–VIII nearly completely brown; tergites IX bright brown. Hypopygium brown. (Fig. 7)
Head. AR 1.98–2.1, 2.04. Temporal setae 14–26, 19, including 10–18, 13 verticals and 4–8, 6 postorbitals. Clypeus with 47–55, 53 setae. Tentorium 210–220, 215 µm long, 60–75, 66 µm wide. Length of palpomeres 1–5 (µm): 55–70, 60; 65–70, 66; 145–170, 161; 225–265, 243; 275–320, 300.
Wing (Fig. 8). Wings with dark macrotrichia arranged in 2 broad bands and additional spots. VR 0.92–0.94, 0.93. Brachiolum with 3 long setae. Squama with 31–48, 38 setae. C extension 80–90, 88 µm long.
Thorax. Antepronotal setae 9–17, 14. Dorsocentrals 29–53, 42; acrostichals 40–49, 46; prealars 27–38, 34; scutellars 11–29, 20; preepisternals 4–7, 5; postnotals 6–13, 10.
Legs. Spur on fore tibiae 48–55, 53 µm long with 11 lateral teeth; apex of fore tibiae with 4–5, 5 setae (Fig. 9). Spur on mid tibiae 65–75, 69 and 88–93, 90 µm long with 14 and 17 lateral teeth (Fig. 10). Spur on hind tibiae 60–65, 64 and 70–98, 88 µm long with 17 and 15 lateral teeth; tibial comb on hind leg of 9 setae (Fig. 11). Length (µm) and proportions of legs (hind tarsi of specimen No. 1598 were lost) as in Table 2.
Hypopygium (Fig. 12). Gonocoxite 250–315, 269 µm long; inner margin with comb of 12 long setae. Gonostylus 160–185, 172 µm long. HR 1.49–1.70, 1.60. HV 2.64–3.11, 2.90.
Distribution: The species was found in Fujian and Guangxi Provinces of Oriental China.
Remarks: The Chinese material is treated as a small form of P. v a r i u s.
description: Published as part of Cheng, Ming & Wang, Xinhua, 2006, Psectrotanypus Kieffer (Diptera: Chironomidae: Tanypodinae) from China, pp. 49-56 in Zootaxa 1128 on pages 52-54, DOI: 10.5281/zenodo.171841