Micropsectra lindebergi

Author: Säwedal, 1976

Exuviae 5.0-5.7mm long (m=5.4mm, n=14) (148-1.jpg).
Cephalothorax: Cephalic tubercles very short conical. Frontal setae 83-128µm long (n=8). Antennal sheath base with a small tubercle, usually indistinguishable. Thoracic horn 470-643µm long (n=9); ThR 12.9 (n=1). Thoracic horn setae from near base, longest seta 130-170µm long (n=3), 0.36 of horn length (n=1). Posterior thoracic mound very weak. Pearl row absent.
Abdomen: Length hook row II 0.41-0.52x width tergite; hooks 99-115 (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 spinules less than 45µm long. The greater part of the spinule band on tergite III anterior to seta D5 (148c.jpg). Tergites IV and V with a pair of transverse, slightly oblique point patches. 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. Pedes spurii B II well-developed. Comb of segment VIII 20-26µm wide; with 2-5 sturdy marginal teeth (148d.jpg). Lateral taeniae of segments IV-VIII: 3,3,4,4,5.
Anal segment: Anal lobe ratio 1.1-1.3 (n=6). Fringe of anal lobe complete, with 37-55 taeniae (m=47, n=16).
(Linked adult male: Langton and Pinder, 2003a)

Note: Micropsectra insignilobus Kieffer, according to Säwedal, 1976a (p. 113), may perhaps be separable on the number of anal lobe taeniae: 42-52 in lindebergi, 53-60 in insignilobus.

Species keys out at Page 522: Tanytarsini 163 Micropsectra of the Text Key.

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

Ecological notes
Northern lakes.