Tanytarsus pe20

Form described by Langton, 1991

Exuviae 2.2-2.4mm long (n=3).
Cephalothorax: Cephalic tubercles very shallow cones. Frontal setae 30, 35µm long (n=2). Thoracic horn 153-200µm long; ThR 11.7-13 (n=3). Posterior thoracic mound weak. Wing sheaths strongly swollen in apical half and suddenly contracted before the rounded apex; nose and pearl row absent.
Abdomen: Spine bands of tergite III rudimentary or absent (142j.jpg). Tergites IV and V with the armament arranged in longitudinal bands. Armament tergite IV strong, 40µm long (n=3). ArR III-VI 0, 0.54 : 1.0 : 0.69-0.81 : 0.63-0.89 (n=3). Postero-lateral comb of segment VIII 23-28µm wide (n=3); with 3-5 marginal teeth (n=4). Lateral taeniae of segments V-VIII: 0,0,0,5 (very thin).
Anal segment: Fringe of anal lobe with 19-29 taeniae (n=4), forming a complete series.

Form keys out at Page 479: Tanytarsini 120 Tanytarsus of the Text Key.

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

Ecological notes
A freshwater lake, Yugoslavia.