Protanypus morio

Author: (Zetterstedt, 1838)

Exuviae 7.3-11.5mm long (n=21) (026-2.jpg).
Cephalothorax: Anterior thoracic tubercles as large as the cephalic tubercles (026g.jpg). Thoracic horn 560-815µm long (m=726µm, n=20), pointed apically and longitudinally finely wrinkled (026f.jpg); ThR 6.8-13.4 (m=9.9, n=19).
Abdomen: Abdominal tergites and sternites covered with dense minute shagreen points, elongate spinules rare or absent.
Anal segment: Anal lobe ratio 1.8-2.1 (n=20). Each anal lobe bears about ten marginal setae, the posterior of which are spine-like and inserted in conspicuous sockets (026h.jpg) (these setae are often broken off, but their sockets remain.)
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 526: Diamesinae 2 Protanypus of the Text Key.

Holarctic species: NW Europe.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Northern and montane lakes.