Cladotanytarsus vanderwulpi (Edwards)

Wang, Xinhua & Guo, Yuhong, 2004, A review of the genus Cladotanytarsus Kieffer from China, with the description of three new species (Diptera: Chironomidae: Tanytarsini), Zootaxa 750, pp. 1-19 : 14-16

Cladotanytarsus vanderwulpi (Edwards) ( Fig. 14)

Cladotanytarsus vanderwulpi (Edwards) Albu 1980: 279 (Fig. 188), Bilyj & Davies 1989: 950, Brundin 1947: 81 (Fig. 120), Edwards 1929: 418 ( Fig. 15 g, Plate XIX, Fig. 16), Fittkau & Reiss 1978: 436, Sasa 1985: 46, 1989: 62, Sasa & Kawai 1987: 28, Sasa & Okazawa 1992: 41. Tokunaga 1940: 304, Wang & Zheng 1993: 6 ( Figs. 14, 15 )

Material examined. 1 male (BDN. No. 12746), Hubei Province, Shennongjia Natural Conservation, VII.18.1997. Leg. Yuzhou Du; 5 males, Tianjin City, Yuqiao Reservoir, V.10.1987 (BDN. No. 20277, 20278, 20279), VIII.12.1986 (BDN. No. 0 4807, 0 4808, 04809). Leg. X Wang.

Diagnosis. This species is characterized by the bent superior volsella and elongate blunt digitus, and a broad anal point with more than 20 spinules between crests.

Male imago (n =7)

Total length 1.70–2.70 mm, 2.16 mm. Wing length 1.00– 1.20 mm, 1.09 mm. Total length/ wing length 1.64–2.25, 1.91. Wing length/profemur length 2.27–2.60, 2.39. Coloration as in remarks below.

Head. Frontal tubercles absent. Ultimate flagellomere (n =3) 230–400 µm, 317µm long. AR 0.58–1.00, 0.75. Temporal including 4–7, 6 inner, 1–2, 2 outer verticals and 0–2, 1 postorbitals. Clypeus with 9–12, 10 setae. Tentorium 100–114 µm, 106µm long, width 24–26 µm, 25µm. Palpomere lengths (in µm): 30–36, 33; 30–40, 35; 76–96, 85; 80–90, 87; 120–154, 133.

Wing (n =5). VR 1.29–1.32, 1.30 and Cu length 520–576 µm, 541µm. Macrotrichia covering most of membrane, present on all veins except M and Cu. Number of setae on membrane: R4+5 43–78, 62; M1+2 50–75, 60. Number of setae on veins: R 9–14, 12; R 1 7– 16, 111; R4+ 5 7–15, 12; M1+ 2 24–28, 26; M3+ 4 6–12, 8; Cu1 0–12, 5; An 0–10, 4.

Thorax. Acrostichals 4–6, 5; dorsocentrals 5–7, 6, prealars 1–2, 1. Scutellum with 0– 4, 2 setae.

Legs. Spur of front tibia (n =2) 18µm. Spurs of middle tibia 20–22 µm and 18–20µm long, and of hind tibia 20–32 µm, 26 µm and 24–26 µm, 24µm long. Combs of middle leg composed of 8–12 and 8–12 free teeth, of hind leg composed of 10 and 12 free teeth.

Lengths and proportion of legs (in µm):

Hypopygium ( Fig. 14) Anal point 28–36 µm, 32µm long. Phallapodeme 70–110 µm, 86µm long. Transverse sternapodeme 60–86 µm, 80µm long. Gonocoxite 92–140 µm, 117µm long. Superior volsella 30–44 µm, 35µm long. Digitus 26–34 µm, 29µm long.

Inferior volsella 35–54 µm, 44µm long. Median volsella 22–35 µm, 30µm long. Gonostylus 54–78 µm, 64µm long. HR 1.70–2.00, 1.83; HV 2.81–4.35, 3.35.

Distribution. This species has a wide Palaearctic distribution.

Remarks. The coloration is variable, with specimens from Tianjin being yellowish brown and some having dark brown vittae and others without vittae. The specimen from Shennongjia is yellowish green and lacks colored vittae.

Figures

FIGURE 15. Hypopygium of Cladotanytarsus yunnanensis Wang & Zheng from Wang & Zheng 1993 (Fig. 16).