Tanytarsus niger

Author: Andersen, 1937

Exuviae 4.6-6.0mm long (n=3).
Cephalothorax: Cephalic tubercles in male a short cylindrical papilla on a broad rounded mound, in female rounded conical (? constant). Frontal setae 70, 80µm long (n=2). Antennal sheath base with a large mammillate projection. Thoracic horn without setulae or spinules (138f.jpg), 675-795µm long; ThR 10.6-14.6 (n=3). Posterior thoracic mound swollen. Wing sheaths rounded apically, pearl row absent.
Abdomen: Hooks of hook row II 82, 113 (n=2). Tergite II without anterior point patches. Spines of tergite III externally with a band of well-separated points, about 4 points wide near the anterior end, gradually narrowing posteriorly; armament of tergite IV of points (138g.jpg). Longest spine tergite III 20-83µm long (n=3). Tergites IV and V with the armament arranged in longitudinal bands. Armament tergite IV strong, 160-188µm long (n=3). ArR III-VI 1.0-1.28 : 1.0 : 0.82-0.94 : 0.58-0.73 (n=3). Postero-lateral comb of segment VIII 38-50µm wide; with 6-10 marginal teeth (n=3). Lateral taeniae of segments V-VIII: 0,0,2,4.
Anal segment: Anal lobe ratio 1.09-1.2 (n=3). Fringe of anal lobes with 16-24 taeniae (n=3), forming a complete series, but with a gap before the commencement of the fringe (138i.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 436: Tanytarsini 77 Tanytarsus of the Text Key.

Holarctic species: widespread in Europe (not Mediterranean).
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Stagnant water.