Parachironomus frequens

Author: (Johannsen, 1905)

Exuviae 5.9-7.7mm long (n=4).
Cephalothorax: Cephalic tubercles short and broad. Thoracic horn much branched. Thorax with a conspicuous row of conspicuously large granules near suture (112b.jpg). Posterior thoracic mound without obvious anterior or posterior swellings.
Abdomen: Tergite armament of Parachironomus-pattern, but tergite II with a posterior transverse point band extended forwards a short distance on each side of mid-line, and the posterior points of tergite VI not conspicuously larger than those preceding and not set on a postero-median flap (112i.jpg). Length hook row II 0.28, 0.40x width tergite (n=2). Sternite I without toothed humps; II without armament. Vortex present. Comb of segment VIII 4-6 fine colourless spines set on the corner of the segment near bases of the fourth and fifth lateral taeniae (n=8). Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Fringe of anal lobe with 85-145 taeniae (n=4).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 257: Chironomini 154 Parachironomus of the Text Key.

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