Stempellina subglabripennis

Author: (Brundin, 1947)

Diagnosis (n=2, unless stated otherwise, material in coll. ZSM)
Exuviae 3.3, 3.6mm long.
Cephalothorax: Cephalic tubercles absent. Frontal setae elongate, flexible, narrow taeniate, 95µm long (n=1). Antennal sheath bases with a sharp transparent conical projection. Thoracic horn 370, 420µm long, with the extreme base swollen, thereafter long and narrow (129e.jpg); ThR 8.2, 12. Thorax anteriorly thickly set with elongate spinous teeth.
Abdomen: Length hook row II 0.36x width tergite; hooks 77. 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 (128c.jpg ; 129i.jpg). Pedes spurii B II weak. Segment VIII without lateral spurs in addition to the one or two postero-lateral spurs. Lateral taeniae of segments V-VIII: 3,4,4,4.
Anal segment: Anal lobe ratio 1.3. Fringe of anal lobe with 10, 13 taeniae.

Species keys out at Page 366: Tanytarsini 9 Stempellina of the Text Key.

Holarctic species: widespread in Europe, eastern Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Northern lakes.