Tanytarsus sylvaticus

Author: (van der Wulp, 1858)

Exuviae 5.0-6.2mm long (m=5.6mm, n=15) (137-2.jpg).
Cephalothorax: Thoracic horn broad basally, 370-565µm long (m=474µm, n=12), armed with small spinules or teeth (137g.jpg); ThR 5.3-9.3 (m=7.7, n=10). Wing sheaths rounded apically, pearl row absent.
Abdomen: Armament of tergites III and IV of spines as well as points (137h.jpg). Armament tergite IV strong, 190-275µm long (m=239µm, n=12). Tergites III-VI with the armament arranged in longitudinal bands; ArR III-VI 1.0-1.37 : 1.0 : 0.61-0.77 : 0.41-0.61 (n=12). Comb of segment VIII 70-95µm wide (n=6); with 10-15 marginal teeth (n=8). Segment VIII with four or five lateral taeniae.
Anal segment: Fringe of anal lobe with 26-41 taeniae (m=34, n=16) forming a complete series.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 437: Tanytarsini 78 Tanytarsus of the Text Key.

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

Ecological notes
Lakes and reservoirs. A Spring eclosing species.