Stempellina pe2

new form

Diagnosis (n=1, leg. J. Moubayed.)
Exuviae 3.1mm long.
Cephalothorax: Cephalic tubercles absent. Frontal setae elongate, flexible, narrow taeniate, 64µm long. Antennal sheath bases with a sharp conical projection. Thoracic horn 240µm long; ThR 6.3; horn broad at base then gradually tapered to tip (129f.jpg). Thorax anteriorly thickly set with short conical teeth.
Abdomen: Length hook row II 0.4x width tergite; hooks 79. 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). Pedes spurii B II absent. Segment VIII with three curved lateral spurs as in Stempellina bausei (128d.jpg). Lateral taeniae of segments V-VIII: 3,4,4,3.
Anal segment: Fringe of anal lobe with 17/20 taeniae. Anal lobe ratio 1.2.

Form keys out at Page 367: Tanytarsini 10 Stempellina of the Text Key.

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

Ecological notes
Lake, French Alps.