Micropsectra bidentata

Author: (Goetghebuer, 1921)

Exuviae 3.7-5.9mm long (n=8).
Cephalothorax: Cephalic tubercles short conical; frontal setae 110-150µm long (n=5) (147n.jpg). Antennal sheath base with a small conical swelling. Thoracic horn with long, dense setae (147j.jpg). Thoracic horn 245-340µm long; ThR 5.0-9.7 (n=7). Thoracic horn seta 170-240µm long (n=8); length seta 0.63-0.92x length horn (n=6). Posterior thoracic mound moderately swollen. Pearl row absent.
Abdomen: Length hook row II 0.4-0.46x width tergite; hooks 110-138 (n=4). 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 spines longer than 25µm (147k.jpg). Tergites IV and V with a pair of transverse, slightly oblique point patches. Lateral longitudinal bands of tergites IV and V of spinules. Tergites VII and VIII with very restricted armament or smooth. Pedes spurii B II well-developed. Comb of segment VIII 25-43µm wide (n=8); with 3-6 marginal teeth (m=4.5, n=11). Lateral taeniae of segments IV-VIII: 3(2,1),3,4,4,5.
Anal segment: Anal lobe ratio 1.0-1.2 (n=6). Fringe of anal lobe complete, with 37-53 taeniae (m=42.8, n=12).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 515: Tanytarsini 156 Micropsectra of the Text Key.

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

Ecological notes
Streams and trickles, mainly in montane regions.