Stempellina bausei

Author: (Kieffer, 1911)

Exuviae 2.9-3.5mm long (m=3.2mm, n=13) (128-1.jpg).
Cephalothorax: Cephalic tubercles 34, 43µm long (n=2); frontal setae elongate, flexible, narrow taeniate, 223µm long (n=1). Thoracic horn 146-215µm long (n=8); ThR 4.6-7.6 (n=3) (128b.jpg). Thorax anteriorly by suture bearing elongate tubercles with rounded tips.
Abdomen: 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). Tergite V with longitudinal point bands resembling those on IV and VI. Segment VIII with three brown posteriorly curved spurs on each side (128d.jpg).
Anal segment: Fringe of anal lobe with 18-24 taeniae (m=20.4, n=13) (128d.jpg). Lateral taeniae of segments V-VIII: 3(4),4,4,3.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 365: Tanytarsini 8 Stempellina of the Text Key.

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

Ecological notes
Northern and montane lakes; ditches and ponds in the lowland south.