Parachironomus mauricii

Author: (Kruseman, 1933)

Exuviae 8.3, 9.8mm long (n=2) (110-1.jpg).
Cephalothorax: Cephalic tubercles short and broad, without small points apically. Thoracic horn much branched. Thorax extensively granulate, the granules near the suture larger and becoming more transversely elongate towards the middle. Posterior thoracic mound somewhat swollen posteriorly.
Abdomen: Tergite armament according to Parachironomus-pattern, but tergites II-V without a distinct unbroken posterior row or band of strong points; VI without a median posterior oval swelling. Hook row II medially interrupted, length of row 0.11 (0.11 gap) 0.11x width tergite (n=1). Tergite II without armament. Sternite II with both anterior and posterior transverse spine bands. Comb of segment VIII difficult to distinguish as the small colourless spines are set in a yellowed patch of rugose cuticle on the apico-lateral corner between the bases of the fourth and fifth lateral taeniae. Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Fringe of anal lobe with about 160 taeniae (n=1) (110d.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 340: Chironomini 237 Parachironomus of the Text Key.

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

Ecological notes
A slow flowing drain in England.