Parachironomus tenuicaudatus

Author: (Malloch, 1915)

Exuviae 5.0-6.6mm long (n=4).
Cephalothorax: Cephalic tubercles 100, 130µm long; 1.9, 2.0x higher than broad (n=2). Thoracic horn much branched. Thoracic granulation fine, without conspicuous granules near suture. Posterior thoracic mound with an anterior projection and a posterior swelling.
Abdomen: Tergite armament of Parachironomus-pattern, but tergite II without armament. Hook row II on the posterior edge of a projecting flap of the tergite (110g.jpg); length of row 0.26, 0.23x width tergite (n=2). Posterior points of tergite VI conspicuously larger than those preceding (112f.jpg). Sternite I without toothed humps. Sternite II with a posterior transverse band of small colourless points. Vortex absent. Comb of segment VIII absent. Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Fringe of anal lobe with 92-101 taeniae (n=5).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 246: Chironomini 143 Parachironomus of the Text Key.

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

Ecological notes