Omisus caledonicus

Author: (Edwards, 1932)

Exuviae 7.8-9.3mm long (n=4) (116-2.jpg).
Cephalothorax: Cephalic tubercles and frontal setae present (116f.jpg). Thorax with conspicuously large granules near suture (112b.jpg).
Abdomen: Hook row II 0.22, 0.40x width tergite (n=2); hooks 20-26 (n=4). Tergites II-VI with a pair of transversely elongate anterior point patches (116g.jpg). Vortex present. Lateral taeniae of segments V-VIII: 3,4,4,5 (116-2.jpg).
Anal segment: Fringe of anal lobe with 48-67 taeniae (n=4) (116h.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 270: Chironomini 167 Lauterborniella of the Text Key.

Widespread in Europe (not Mediterranean).
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Northern lakes.