Psectrocladius psilopterus

Author: (Kieffer, 1906)

Exuviae 4.3-6.3mm long (m=5.1mm, 93) (048-2.jpg).
Cephalothorax: Frontal setae absent. Thoracic horn 315-470µm long (m=400µm, n=89), small-toothed (048g.jpg); ThR 3.9-7.2 (m=5.3, n=80). Anterior dorsocentral seta fine, the remaining three sturdy (048h.jpg).
Abdomen: Tergites III-VIII with restricted shagreen, at least on VII and VIII, with conspicuous large points medially and/or posteriorly. 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. Three or four lateral setae on segments II-V, not taeniate; three very small lateral setae on segment VI (if a fourth is present on the apico-lateral corner, it is much finer than the other three) (048i.jpg , 048j.jpg). At least one lateral seta on segment VII, and all those on segment VIII taeniate.
Anal segment: Anal lobe ratio 1.7-2.5 (m=2.1, n=97). Anal lobes rounded apically, without teeth. Anal lobe taeniae 23-41 (m=32, n=103); 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.

Holarctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Stagnant or very slow flowing waters.