Chironomus beljaninae

Author: Wülker, 1991

Diagnosis (n=1)
Exuviae 9.5mm long.
Colour: Contrast in colour between thorax and abdomen not so strongly marked: specimens dark anteriorly also have the abdomen infuscated; outer margin of the anal lobes coloured except at base.
Cephalothorax: Cephalic tubercles LxB 93x80µm. Frontal setae 65µm long. Thoracic horn much branched, basal ring of horn 187x100µm. Tracheal patch of thoracic horn without an "eye", patch 145x50µm; 16 tracheoles across, 3µm diameter. Thorax densely small granulate except posteriorly.
Abdomen: Hook row II entire, length of row 0.43x width tergite; 79 hooks. Armament of tergites II-VI in the form of an undivided, usually extensive patch of strong points, armament not strongly waisted and with the posterior transverse band not successively increasing in extent to tergite VI; usually reduced on VI. The point patches increase in extent from tergite II to V, but on VI the patch is more or less reduced, the points in each segment increasing in size posteriorly. Lateral shagreen bands of sternite III broadly joined anteriorly across the sternite; only the anterior transverse band present on sternite IV (102n.jpg). Pleura of segment IV spinulate. Comb of segment VIII on the end of an elongate ventral cuticular mound with 4/5 elongate teeth.
Anal segment: Anal lobe with 92/113 fringe taeniae.

Species keys out at Page 172: Chironomini 69 Chironomus of the Text Key.

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

Ecological notes
Liikapuro, Finland.