Constempellina brevicosta

Author: (Edwards, 1937)

Diagnosis (Material in coll. ZSM)
Exuviae 3.0-3.8mm long (m=3.5mm, n=6).
Cephalothorax: Cephalic tubercles 45-70µm long (n=4). Frontal setae thorn-like (129h.jpg), 75-105µm long (m=87µm, n=14). Antennal sheath bases with a small granular swelling. Thoracic horn 170-230µm long (m=208µm, n=15); ThR 2.4-3.3 (m=3.0, n=14); horn with a swollen base, narrowing rapidly in the apical half. Thorax anteriorly by suture thickly set with small spinous teeth.
Abdomen: Hook row II with 79-101 hooks (n=7). Tergites III-VI with a narrow longitudinal band of points on each side of the mid-line, posteriorly widened or even extended laterally for a short distance, best developed on tergite V (129i.jpg). Tergite IV with the armament extending into the posterior half of the segment.Segment VIII with two to six pale golden spurs on each side (129j.jpg). Lateral taeniae of segments V-VIII: 3,4,4,2.
Anal segment: Anal lobe ratio 1.04 (n=1). Fringe of anal lobe with 6-13 taeniae (m=9, n=15).

Species keys out at Page 363: Tanytarsini 6 Constempellina of the Text Key.

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

Ecological notes
Northern and montane lakes.