Microchironomus tener

Author: (Kieffer, 1918)

Exuviae 3.8-5.0mm long (m=4.3mm, n=20) (109-2.jpg).
Cephalothorax: Cephalic tubercles conical, 125-155µm high (n=6); frontal setae preapical, 60µm long (n=1) (109f.jpg). Antepronotum with a conspicuous dorsal mound bearing a taeniate seta (111d.jpg).
Abdomen: Hook row II medially interrupted, length of row 0.18-0.23 (0.03-0.09 gap) 0.18-0.23x width of tergite (n=5); hooks 16-26 in each half row (n=6). Tergites II-V without a distinct unbroken posterior row or band of strong points, present on VI (109g.jpg). Sternite I with a single antero-lateral toothed hump on each side (111b.jpg); II anteriorly with at most a band of shagreen. Comb of segment VIII of 1-2 thorns. Lateral taeniae of segments V-VIII: 4,4,4,4.
Anal segment: Fringe of anal lobe with 39-54 taeniae (m=46.6, n=20) (109h.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 342: Chironomini 239 Microchironomus of the Text Key.

Palaearctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Stagnant or very slow-flowing water; fresh or slightly saline.