Author: Langton, 1980
Diagnosis
Exuviae 5.5-6.5mm long (m=6.0mm, n=8).
Cephalothorax: Cephalic tubercles not conspicuous; frontal setae present. Thoracic horn 350-430µm long (n=7), small-toothed, not swollen apically; ThR 5.1-7.5 (n=6). Second dorsocentral seta fine, the rest sturdy.
Abdomen: Tergites III-VIII with restricted shagreen, at least on VII and VIII. Median point patches present on tergites IV-VI (rarely an indication of one of the patches on III); patches double, at least on tergites IV and V, if joined, only by a few scattered points. 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; posterior seta of segment V developed into a taenia; four lateral taeniae present on segment VI (049k.jpg). At least one lateral seta on segment VII, and all those on segment VIII taeniate.
Anal segment: Anal lobe ratio 1.8-2.0 (n=8). Anal lobes rounded apically, without teeth. Fringe of anal lobe with 29-38 taeniae (n=8); three anal macrosetae situated apically on the anal lobes.
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 685: Orthocladiinae 97 Psectrocladius of the Text Key.
Distribution
Scotland and Ireland.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Northern lakes.