Chironomus pe24

new form

Exuviae 12.6-22.4mm long (n=4).
Colour: Exuviae golden to golden-brown, very rarely brown.
Cephalothorax: Cephalic tubercles LxB 210x185, 260x210µm (n=2). Frontal setae 74-100µm long (n=3). Thoracic horn much branched; basal ring of horn 265x120-336x176µm; tracheal patch 208x80-280x88µm (n=4); 27 tracheoles across (n=2), 3.0µm diameter. Thoracic granulation strong anteriorly near suture, evanescent elsewhere.
Abdomen: Hook row II entire, length of row 0.48-0.50x width tergite (n=3); 82-94 hooks (n=3). Armament of tergites II-VI in the form of an undivided, usually extensive patch of strong points, the points in each segment increasing in size posteriorly. The point patches increase in extent from tergite II to V, but on VI the patch is more or less reduced. Armament of tergites II-VI not strongly waisted and with the posterior transverse band not successively increasing in extent to tergite VI; usually reduced on VI. Sternites III and IV without shagreen. Parasternite II unarmed. Pleura of segment IV covered with spinules. Comb of segment VIII with 11-25 elongate teeth (n=4), set on the end of an elongate ventral cuticular mound which exceeds appreciably the apico-lateral corner of the segment. Lateral taeniae of segments V-VIII: 4,4,4/3,(4)5.
Anal segment: Fringe of anal lobe with 155-211 taeniae (n=3).

Form keys out at Page 150: Chironomini 47 Chironomus of the Text Key.

Widespread in Europe.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Lakes, ponds, drains.