Tanytarsus simulans

Author: Lindeberg, 1967

Exuviae 3.8-4.9mm long (m=4.3mm, n=32).
Cephalothorax: Frontal setae 70, 80µm long (n=2). Base of antennal sheath with a large, acutely conical projection, which is usually very obvious on one or both sides of an exuvial mount. Thoracic horn 255-425µm long (m=322µm, n=19); ThR 13.0-28.6 (n=9). Thoracic horn spinule 8µm long (n=3). Posterior thoracic mound only weakly developed. Wing sheaths rounded apically, pearl row absent.
Abdomen: Length hook row II 0.2-0.32x width tergite (n=5); hooks 55-71 (n=7). Armament of tergite III small and composed of short spines, situated further back on the tergite. Tergites IV and V with the armament arranged in longitudinal bands. Longest spine tergite III 20-70µm long, IV 10-26µm long (n=24). Longest spine IV : III 0.14-0.85 (n=24) (145f.jpg). Armament tergite IV strong, 77-150µm long (m=99µm, n=33). ArR III-VI 0.68-1.35 : 1.0 : 0.48-1.0 : 0.32-0.79 (n=33). Postero-lateral comb of segment VIII 40-55µm wide (m=48.3µm, n=13); with 4-12 marginal teeth (m=7.7, n=33). Lateral taeniae of segments V-VIII: 0,0,1(2),5.
Anal segment: Anal lobe ratio 1.27-1.38 (n=5). Fringe of anal lobe with 23-35 taeniae (m=29.3, n=34), forming a complete series.
(Linked adult male: Langton and Pinder, 2003a)

Note: Part of the Tanytarsus lestagei aggregate.

Form keys out at Page 489: Tanytarsini 130 Tanytarsus of the Text Key.

Fennoscandia, Great Britain.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes