Micropsectra notescens

Author: (Walker, 1856)

Exuviae 5.0-6.3mm long (n=13).
Cephalothorax: Cephalic tubercles with broad conical base and cylindrical apex; frontal setae 150-200µm long (n=6). Antennal sheath base with a weak conical swelling. Thoracic horn 400-650µm long (n=11); ThR 6.2-13.0 (n=8). Thoracic horn seta 235-300µm long (n=11), 0.41-0.70x length horn (n=11) (148r.jpg ; 148m.jpg). Posterior thoracic mound evenly swollen (148s.jpg). Pearl row absent.
Abdomen: Length hook row II 0.53-0.6x width tergite; hooks 162-242 (n=12). Armament of tergite II with the lateral point bands completely fused anteriorly, leaving a longitudinally oval bare patch postero-medially. Tergite III with long bands of spinules (less than 45µm long) or spines (50µm long or more) (148n.jpg); shagreen of tergite III also present anteriorly between the spine bands. Lateral longitudinal bands of spines or spinules absent on tergites IV and V, though there may be a broad field of small points spreading posteriorly from the anterior point patches. Tergites VII and VIII with very restricted armament or smooth. Pleura unarmed or, rarely, with a restricted area of minute points. Pedes spurii B II well-developed. Comb of segment VIII 30-50µm wide; with 3-8 marginal teeth (n=12). Lateral taeniae of segments IV-VIII: 2(3),3,4,4,5.
Anal segment: Anal lobe ratio 1.1-1.4 (n=5). Fringe of anal lobe complete, with 44-57 taeniae (n=7).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 523: Tanytarsini 164 Micropsectra of the Text Key.

Widespread in Europe, Canary Islands, Middle East.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Streams, rivers, spring pools and montane lakes.