Microchironomus ishii Sasa, 1987

Mukherjee, Bindarika & Hazra, Niladri, 2023, Taxonomic studies on Harnischia complex from India (Diptera: Chironomidae), Zootaxa 5278 (2), pp. 239-263 : 257

Microchironomus ishii Sasa, 1987

GenBank accession number. OQ400991

Material examined. 3 males, labelled ‘ Microchironomus ishii Sasa, 1987 , India, West Bengal, Jalpaiguri [26.71˚N, 88.76˚E], 07.iv.2022, Coll. P. Hui’ .

Remarks ( Figs. 6A–C ). Sasa, 1987 described this species from Japan. Sasa, 1987 described this species from Japan, collected in open light open light trap during this revisionary study. The specimen fully corroborates with M. ishii due to the presence of following diagnostic characters: anal point with small setigerous lobe at basal region, rod-like superior volsella subapically slight expanded with 3 simple setae, similar LR 2, LR 3, and wing length. Upon examining the Indian specimens, we observed that AR 2 (AR 1.6–1.8 in Japanese specimens), and Scts 4 (Scts 6–12 in Japanese specimens). Moreover, other significant characters are as follows: eyes with dorsomedial extension of 140 µm; V shaped anal tergite band; gonocoxite 105–110.5 µm long; gonostylus 122–130 µm long; anal point 70–73.5 µm long and widened basally with 3 setae lateral to anal point; superior volsella 48–50 µm long with little expansion at sub-apical end have 3 setae (1 seta at apex, 2 setae located sub-apically); HR 0.86–0.87; HV 2.85–3.

Distribution. The species is reported first time from India, West Bengal. Previously the species was reported from Japan.

Figures

FIGURE 6. Adult male Microchironomus ishii Sasa, 1987. A. Hypopygium (photograph), B. Hypopygium, scale 0.01 mm, C. Superior volsella, scale 0.01 mm.