Corynoneura arctica

Author: Kieffer, 1923

Diagnosis (in part after Hirvenoja and Hirvenoja, 1988a - in italics)
Exuviae 2.0-2.8mm long (m=2.4mm, n=11).
Cephalothorax: Frontal setae taeniate, often missing. Third dorsocentral seta taeniate. First clear pearl row short, followed by 2-4 more or less visible further rows.
Abdomen: Dorsal shagreen on segments I-IX. Sternite I often covered with spinules, otherwise medially bare, occasionally armed only in antero-lateral corners, the antero-lateral spinules conspicuously large, as large as those on sternite II. Sternite II with long colourless spinules, 10µm or more long.
Anal segment: Anal lobe ratio 1.3-1.8 (m=1.5, n=7). Fringe of anal lobe with 35+1 to 50+1 taeniae (m=43+1, n=7). Apical setae of anal lobes taeniate, anterior apical seta at taeniae 16-23.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 604: Orthocladiinae 16 Corynoneura of the Text Key.

Holarctic species: Britain, Fennoscandia, Switzerland, Russia.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Montane and northern pools and lakes.