Parachironomus vitiosus

Author: (Goetghebuer, 1921)

Exuviae 7.3, 7.8mm long (n=2).
Cephalothorax: Cephalic tubercles 45µm long; 1.3x higher than broad (n=1). Thoracic horn much branched. Posterior thoracic mound a little swollen anteriorly and posteriorly, without a long conical posterior projection. Thorax without conspicuously large granules near suture (112a.jpg).
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, 0.32x width tergite (n=2). Tergite VI with the posterior points conspicuously larger than those preceding. Sternite I without toothed humps. Sternite II without armament. Vortex present. Comb of segment VIII 0-4 colourless spines in the apico-lateral corner near the bases of the fourth and fifth lateral taeniae (m=0.9, n=12). Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Fringe of anal lobe with 97-109 taeniae (n=3).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 253: Chironomini 150 Parachironomus of the Text Key.

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

Ecological notes
Stagnant and slow flowing water.