Micropsectra fusca

Author: (Meigen, 1804)

Exuviae 4.6-7.3mm long (m=6.1mm, n=17).
Cephalothorax: Cephalic tubercles short conical, 25µm high. Frontal setae 163-218µm long (n=6). Antennal sheath base weakly swollen. Thoracic horn 480-770µm long (n=6); ThR 10.2-17.9 (n=5). Thoracic horn setae from about basal third, 170-215µm long (n=5); length seta 0.23-0.35x length horn (n=5) (147f.jpg). Posterior thoracic mound strongly swollen. Pearl row absent.
Abdomen: Length hook row II 0.48-0.61x width tergite; hooks 138-195 (n=5). Tergite II without anterior point patches; armament with the lateral point bands completely fused anteriorly, leaving a longitudinally oval bare patch postero-medially. Tergite III with a postero-median patch of dense narrow points on each side (147g.jpg). Tergites IV and V with a pair of transverse, slightly oblique point patches, the lateral longitudinal bands of points only. Tergites VII and VIII with very restricted armament or smooth. Pedes spurii B II very weak. Comb of segment VIII 45-75µm wide; with 8-13 (crowded imbricating) marginal teeth (n=8). Lateral taeniae of segments IV-VIII: 1/2,3,4,4,4.
Anal segment: Anal lobe ratio 1.1-1.4 (n=7). Fringe of anal lobe complete, with 60-103 taeniae (n=9).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 508: Tanytarsini 149 Micropsectra of the Text Key.

Widespread in Europe.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Montane and northern peat pools and lakes.