Corynocera ambigua

Author: Zetterstedt, 1838

Diagnosis (Material in coll. ZSM)
Exuviae 5.0-5.7mm long (n=10).
Cephalothorax: Frontal setae 30µm long (n=1). Thoracic horn 395µm long; ThR 15.8 (n=1) (135f.jpg). Wing sheaths truncate apically, "axe-head" shaped (135e.jpg), pearl row absent.
Abdomen: Tergites II-VI with anterior point patches; ArR II-VI 0.43 : 0.84 : 1.0 : 0.91 : 0.91. Tergites IV and V with the armament arranged in longitudinal bands. Armament tergite IV strong, 160µm long. Comb of segment VIII 60µm wide in the postero-lateral corner of the segment; with 7/8 marginal teeth. (n=1). Lateral taeniae of segments V-VIII: 0,0,0,0.
Anal segment: Fringe of anal lobe with 7-14 taeniae (n=10), restricted to the posterior end of the lobe (135g.jpg).

Species keys out at Page 432: Tanytarsini 74 Corynocera of the Text Key, together with Corynocera oliveri Lindeberg, 1970.

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

Ecological notes
Lakes and ponds.