Author: (Holmgren, 1869)
Diagnosis
Exuviae 5.0-7.1mm long (m=5.6mm, n=21).
Cephalothorax: Cephalic tubercles not so conspicuous; frontal setae present. Thoracic horn 370-470µm long (m=415µm, n=15), not swollen apically, small-toothed; ThR 5.1-8.4 (m=6.1, n=12). Second dorsocentral seta fine, the rest sturdy (049h.jpg).
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 (049i.jpg); lateral setation of segment VI of the arrangement: seta-taenia-seta-taenia (anterior to posterior) (049j.jpg). At least one lateral seta on segment VII, and all those on segment VIII taeniate.
Anal segment: Anal lobe ratio 1.6-2.2 (m=1.85, n=32). Anal lobes rounded apically, without teeth. Fringe of anal lobe with 25-58 taeniae (m=44, n=40). The three anal macrosetae situated apically on the anal lobes.
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 683: Orthocladiinae 95 Psectrocladius of the Text Key.
Distribution
Holarctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Ditches, cattle troughs and ponds in the south; lakes in the north.