Pseudorthocladius filiformis

Author: (Kieffer, 1908)

Diagnosis (n=2)
Exuviae 2.9, 3.0mm long (066-1.jpg).
Cephalothorax: Thoracic horn absent.
Abdomen: Tergites II-VII with anterior transverse tooth rows; II-VIII nearly covered with points and with a posterior transverse row or narrow band of strong points (066b.jpg).
Anal segment: Anal lobe ratio 2.4. Anal lobes without fringe and not drawn out into a point. Each anal lobe folded upwards, the elevated margin with a well-developed crest of strong teeth extending to the insertion of the anal macrosetae (066c.jpg). Three anal macrosetae; length of setae 65, 75µm; 0.35, 0.30x lobe length.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 815: Orthocladiinae 227 Pseudorthocladius of the Text Key.

Widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Northern and montane streams and lakes. Larvae in wet moss.