Paratanytarsus inopertus

Author: (Walker, 1856)

Exuviae 3.7-4.8mm long (m=4.2mm, n=18).
Cephalothorax: Cephalic tubercles conical, projecting. Thoracic horn 317-420µm long (m=352µm, n=12); ThR 9.3-16.3 (m=11.8, n=12). Thoracic horn seta 34-50µm long (n=10) (131i.jpg). Posterior thoracic mound smoothly rounded. Dorsocentral setae simple, the longer of the anterior setae exceeding 150µm in length.
Abdomen: Tergite III with a patch of spines on each side in the posterior half; IV with a single, broad oval antero-median point patch, without lateral longitudinal spine bands; point patches of tergite V paired (131j.jpg). Comb of segment VIII 25-43µm wide (m=32.4µm, n=12); with 4-11 marginal teeth (n=18). Lateral taeniae of segments IV-VIII: 2(3),3,4,4,5.
Anal segment: Fringe of anal lobe with 31-42 taeniae (m=36.4, n=20).
Note: P. inopertus and Paratanytarsus dissimilis may be no more than the extremes of a variable species.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 389: Tanytarsini 32 Paratanytarsus of the Text Key.

Holarctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Streams, rivers, drains, pools and lakes.