Demicryptochironomus (Demicryptochironomus) asamaprimus Sasa et Hirabayashi

Yan, Chuncai, Saether, Ole A., Jin, Zhaohui & Wang, Xinhua, 2008, Three new species of the Harnischia complex from the Sino-Indian Region, with a review of Demicryptochironomus Lenz (Diptera: Chironomidae), Zootaxa 1968, pp. 1-22 : 5-6

Demicryptochironomus (Demicryptochironomus) asamaprimus Sasa et Hirabayashi

( Figs 1–3)

Demicryptochironomus asamaprimus Sasa et Hirabayashi, 1991: 117 ; Sasa and Okazawa (1991a: 53); Sasa and Okazawa (1991b: 106); Sasa (1993: 82).

Material examined. Holotype male ( NSM No. 203: 71, misprinted as No. 203: 74 in the original paper), JAPAN: Nagano Prefecture, Asama-Onsen in the suburbs of Matsumoto City , 17.v.1990, light trap.

Diagnostic characters. The species can be separated from other members of the subgenus by the thumblike superior volsella with 2 setae; reduced inferior volsella with microtrichia; prominent frontal tubercles; and AR of about 2.5.

Male ( Figs 1–3). As in Sasa and Hirabayashi (1991: 117) with the following corrections and additions:

AR 2.51. Brachiolum with 2 setae, R with 21 setae, R 1 with 20 setae, R 4+5 with 22 setae. Midleg without sensilla chaetica. Tergite IX with 34 setae. Laterosternite IX with 5 setae. Anal tergite bands V-shaped. Phallapodeme 118 µm long. Transverse sternapodeme 82 µm long. Inferior volsella sheet-shaped, covered with microtrichia. Gonocoxite 128 µm long, inner margin with 7 strong setae. Gonostylus 193 µm long, swollen midially, tapering towards apex, inner margin with 20 setae. HR 0.66; HV 2.45.

Distribution. The species is recorded from Japan.