Micropsectra junci

Author: (Meigen, 1818)

Diagnosis (n=3)
Exuviae 4.3-5.6mm long.
Cephalothorax: Cephalic tubercles broad conical with a cylindrical apex; total 38µm long. Frontal setae 160-178µm long (n=4). Antennal sheath base with a small rounded tubercle. Thoracic horn 385-455µm long; ThR 6.4-10.1 (148o.jpg). Thoracic horn seta 215-230µm long, 0.51-0.56 of horn length. Posterior thoracic mound swollen and with a finger-like posterior projection (148q.jpg). Pearl row absent.
Abdomen: Length hook row II 0.43-0.51x width tergite; hooks 128-146. Armament of tergite II with the lateral point bands completely fused anteriorly, leaving a longitudinally oval bare patch postero-medially, anterior point patches absent. Tergite III with spinules (less than 45µm long) (148p.jpg). Tergites IV and V with a pair of transverse, slightly oblique antero-median point patches. Tergites VII and VIII with very restricted armament or smooth. Pedes spurii B II weak. Comb of segment VIII 20-35µm wide; with 4, 5 marginal teeth. Lateral taeniae of segments IV-VIII: 2,3,4,4,5.
Anal segment: Anal lobe ratio 1.2-1.3. Fringe of anal lobe complete, with 46-52 taeniae.
(Linked adult male: Langton and Pinder, 2003a)

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

Holarctic species: widespread in Europe, eastern Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Streams, rivers and montane lakes.