Tanytarsus pe17

Form described by Langton, 1991

Diagnosis (n=1)
Exuviae 3.7mm long.
Cephalothorax: Cephalic tubercles short conical. Frontal setae 60µm long. Antennal sheath with a tiny conical projection. Precorneal setae unusual in being stiff, needle-like. Thoracic horn smooth, grossly expanded near base to produce an overall triangular shape, 225/250µm long (138b.jpg); ThR 2.4/3.6. Wing sheaths rounded apically, pearl row absent.
Abdomen: Longest spine III 25µm long; tergite IV usually with points only. Tergites IV and V with the armament arranged in longitudinal bands. Armament of tergite IV 120µm long. ArR III-VI 1.1 : 1.0 : 0.83 : 0.73. Postero-lateral comb of segment VIII 40µm wide; with 5/5 marginal teeth. Segments VII and VIII without taeniae, the lateral setae less than 100µm long.
Anal segment: Anal lobe ratio 1.3. Fringe of anal lobe with 15/16 taeniae, forming a complete series.

Note: This form may just be a gross aberration of Tanytarsus miriforceps (Kieffer, 1921).

Form keys out at Page 439: Tanytarsini 80 Tanytarsus of the Text Key.

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

Ecological notes
Lunzer Untersee.