Chironomus pseudomendax

Author: Wülker, 1999

Diagnosis (n=1, material in coll. Wülker)
Exuviae 10mm long.
Colour: Thorax golden brown; abdomen pale golden with darker golden longitudinal markings, the anal lobes colourless externally for the length of the fringe.
Cephalothorax: Cephalic tubercles conical, 130µm high. Thoracic horn much branched. Thorax golden brown.
Abdomen: Hook row II medially interrupted, length of row 0.20 (0.07 gap) 0.21x width tergite; hooks 39/39. 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 tergite II not spreading out laterally in front of the anterior adhesion marks. Armament of tergites more extensive: e.g. tergite IV with marmoration restricted to the lateral margin of the point patch, points usually reaching as far laterally as seta D2. Posterior points of tergites III, IV and V very little or no larger than those in mid-tergite. Anterior points of sternite VII spiculate and grouped in irregular rows; those of the tergite more robust, resembling in shape the smaller points on the preceding tergite. Pedes spurii B of segment II conspicuous. Pleura IV unarmed. Conjunctives III/IV and IV/V with a small lateral seta, V/VI and VI/VII unarmed or very weakly armed. Comb of segment VIII with 2/3 dark apical teeth. Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Fringe of anal lobe with 97/102 taeniae.

Species keys out at Page 144: Chironomini 41 Chironomus of the Text Key.

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

Ecological notes
A shallow pool, Abisko, north Sweden.