Tanytarsus recurvatus

Author: Brundin, 1947

Exuviae 2.6-3.3mm long (n=8).
Cephalothorax: Cephalic tubercles very weak. Frontal setae 40, 45µm long (n=2). Antennal sheath base with a small conical swelling. Thoracic horn 255-375µm long; ThR 17-26.2 (n=4). Posterior thoracic mound moderately swollen with a small darkened tubercle. Wing sheaths rounded apically, pearl row absent.
Abdomen: Length hook row II 0.38-0.47x width tergite (n=5); hooks 75-99 (n=6). Small rounded point patches present on tergite II anteriorly; III with points only; IV and V with the armament arranged in longitudinal bands. Armament tergite IV strong, 45-60µm long (n=5). ArR II-VI 0.7-1.0 : 0.8-1.0 : 1.0 : 0.8-1.1 : 0.67-1.1 (n=5). Postero-lateral comb of segment VIII 18-28µm wide (n=7); with 3-6 marginal teeth (n=8). Lateral taeniae restricted to segment VIII and only feebly flattened.
Anal segment: Anal lobe ratio 0.63-0.8 (n=8). Fringe of anal lobe with 12-21 taeniae, forming a complete series.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 454: Tanytarsini 95 Tanytarsus of the Text Key.

Holarctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Northern and montane lakes.