Psectrocladius bisetus

Author: Goetghebuer, 1942

Exuviae 3.3-4.1mm long (n=9).
Cephalothorax: Frontal setae absent. Thoracic horn 255-325µm long (n=6), small-toothed; ThR 5.1-6.2 (n=5). Anterior dorsocentral seta fine, the remaining three sturdy (048h.jpg).
Abdomen: Median point patches single, absent on tergite VII. Points of point patches large, the longest greater than 35µm long, usually obviously exceeding the length of the longest tooth of the posterior transverse rows. Tergites III-VIII with restricted shagreen, at least on VII and VIII. Three or four lateral setae on segments II-VI, not taeniate; the 3 lateral setae on segment VI very small (if a fourth is present on the apico-lateral corner, it is much finer than the other three) (048i.jpg). At least one lateral seta on segment VII, and all those on segment VIII taeniate.
Anal segment: Anal lobe ratio 1.9-2.4 (n=9). Anal lobes rounded apically, without teeth. Anal lobe taeniae 14-21 (m=18, n=9); the three anal macrosetae situated apically on the anal lobes.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 675: Orthocladiinae 87 Psectrocladius of the Text Key.

Widespread in Europe (not Mediterranean).
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Peat pools, lakes and rivers in the north.