Parametriocnemus boreoalpinus

Author: Gouin, 1942

Exuviae 3.0-3.4mm long (n=6).
Cephalothorax: Thoracic horn 255-325µm long (065f.jpg); ThR 6.7-10.2 (n=7). Pearl row present around apex of wing sheaths.
Abdomen: Pedes spurii B of segment II very large, elongate conical.
Anal segment: Anal lobe ratio 1.9-2.1 (n=3); fringe absent (065g.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 801: Orthocladiinae 213 Parametriocnemus of the Text Key.

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

Ecological notes
Northern and montane rivers.