Micropsectra pe4

Form described by Langton, 1991

Diagnosis (n=1)
Exuviae 3.3mm long.
Cephalothorax: Cephalic tubercles short, broad conical. Frontal setae 100µm long. Antennal sheath base without a conspicuous swelling. Thoracic horn 305µm long; ThR 5.1. Thoracic hornsetae from near base, seta 138µm long, 0.45 of horn length. Pearl row absent.
Abdomen: Length hook row II 0.33x width tergite; hooks 76. Tergite II without anterior point patches. Tergite III with spines 50µm long or more. Tergites IV and V with a pair of transverse, slightly oblique point patches. Tergites IV and V without lateral longitudinal spine or point bands, the position of those on tergite IV marked by a brown band in the cuticle (146g.jpg). Tergites VII and VIII with very restricted armament or smooth. Pedes spurii B II well-developed. Comb of segment VIII 35µm wide; with 7 marginal teeth. Lateral taeniae of segments IV-VIII: 1,2,2,3,5.
Anal segment: Anal lobe ratio 1.04. Fringe of anal lobe complete, with 22/22 taeniae.

Form keys out at Page 519: Tanytarsini 160 Micropsectra of the Text Key.

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

Ecological notes
A river.