Tanytarsus lugens

Author: (Kieffer, 1916)

Exuviae 5.3-7.1mm long (n=8).
Cephalothorax: Cephalic tubercles conical, 15-43µm high (n=3). Frontal setae 77-110µm long (n=6). Antennal sheath base with a conical projection. Thoracic horn 400-600µm long (n=6) (137j.jpg). Posterior thoracic mound swollen. Wing sheaths rounded apically, pearl row absent.
Abdomen: Length hook row II 0.23x width tergite (n=1); hooks 78-89 (n=3). Tergites III-V with the armament arranged in longitudinal bands. Armament tergite IV strong, 160-225µm long (n=8) (137k.jpg). ArR III-VI 1.13-1.53 : 1.0 : 0.48-0.63 : 0.27-0.47 (n=8). Postero-lateral comb of segment VIII 39-45µm wide; with 5-9 marginal teeth (n=5). Lateral taeniae of segments V-VIII: 0,0,0,4(5).
Anal segment: Anal lobe ratio 1.18-1.3 (n=3). Fringe of anal lobes in two groups separated by a gap. Fringe with 9-13 anterior taeniae (m=11.8, n=10), 3-6 posterior taeniae (m=4.4, n=10), the taeniae of the distal group are stouter and longer than those of the anterior group (137l.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 433: Tanytarsini 75 Tanytarsus of the Text Key.

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

Ecological notes
Northern lakes.