Tanytarsus pe23

Form described by Langton, 1991

Diagnosis (n=1)
Exuviae 3.2mm long.
Cephalothorax: Frontal setae 40µm long. Thoracic horn 550µm long, without setulae or points (138d.jpg); ThR 16.9. Wing sheaths rounded apically, pearl row absent.
Abdomen: Length hook row II 0.25x width tergite; hooks 71. Tergite II with anterior point patches; III possessing spines; IV and V with the armament arranged in longitudinal bands (138e.jpg). Longest spine III 90µm long; IV 75µm long. Armament tergite IV strong, 163µm long. ArR II-VI 0.46 : 1.0 : 1.0 : 0.54 : 0.43. Postero-lateral comb of segment VIII 28µm wide; with 4/5 marginal teeth. Lateral taeniae of segments V-VIII: 3,3,4,4.
Anal segment: Anal lobe ratio 1.04. Fringe of anal lobe with 23/23 taeniae, forming a complete series.

Form keys out at Page 443: Tanytarsini 84 Tanytarsus of the Text Key.

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