Boreoheptagyia tibetica Makarchenko, Wang et Willassen

Makarchenko, Eugenyi A., Endo, Kazuo, Wu, Jingyang & Wang, Xinhua, 2008, A review of Boreoheptagyia Brundin, 1966 (Chironomidae: Diamesinae) from East Asia and bordering territories, with the description of five new species, Zootaxa 1817 (1), pp. 1-17 : 13-14

Boreoheptagyia tibetica Makarchenko, Wang et Willassen

( Figs 34–36 )

Boreoheptagyia tibetica Makarchenko, Wang et Willassen, 1996: 825 .

Diagnostic characters. The species was described in detail by Makarchenko et al. (1996). The male is characterized by: total length 1.5 mm; wing length 0.33–0.40 mm. Coloration: general color dark brown, legs yellowish, with light brown or brown rings, wing gray. Antenna with 6 flagellomeres, without plume ( Fig. 34 ), AR 0.44. Acrostichals 14, 22– 26 µm long; dorsocentrals 6, in single anterior group; prealars 15–16; preepisternals absent. Wing reduced, R and R 1 with 16–18 setae, R 4+5 with 56 setae. Alula with 0–8 setae. Squama with 6 short setae. Anal lobe slightly reduced. LR 1 0.66, SV 1 2.95, BV 1 3.51. Hypopygium as in Figures 35– 36 . Aedeagal lobe sclerotized. Gonocoxite simple, broad. Gonostylus curved, widest in basal half, with one short megaseta.

Remarks. The male of B. tibetica can be separated from all other Boreoheptagyia species with femalelike antenna by the features mentioned in the key.

Distribution. The species is known only from a high mountain area (1.700 m a.s.l.) in Tibet Province, China.

Figures

FIGURES 34–39. Boreoheptagyia tibetica Makarchenko, Wang et Willassen, 1996 (34-36) and B. unica Makarchenko, 1994 (37-39), males. 34, 37. Antenna. 35, 39. Hypopygium, dorsal view. 36. Gonostylus. 38. Scutum, dorsal view.