Stenochironomus gibbus

Author: (Fabricius, 1794)

Diagnosis (n=3, unless stated otherwise)
Exuviae 7.8-9.5mm long (114-2.jpg).
Cephalothorax: Thoracic horn much branched. Thorax with conspicuously large granules near suture (112b.jpg).
Abdomen: Hook row II entire, length of row 0.72-0.80x width tergite; hooks 94, 114 (n=2). Tergites VII and VIII without anterior armament. Conjunctives III/IV and IV/V armed with points. Sternite I extensively spinulate. Vortex absent. Comb of segment VIII with 7-9 marginal teeth (114i.jpg). Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Anal lobe ratio 2.2 (n=1). Fringe of anal lobes of 71-105 taeniae (n=3) (114i.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 266: Chironomini 163 Stenochironomus of the Text Key.

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

Ecological notes
Rivers and lakes.