Lappodiamesa vidua

Author: (Kieffer, 1922)

Diagnosis (n=1, material in coll. ZSM)
Exuviae 6.0mm long (027-3.jpg).
Cephalothorax: Frontal setae 100µm long. Thoracic horn absent. Precorneal setae 100; 75; 105µm long.
Abdomen: Hook row II absent. Apical transverse point bands of tergites III-V fused to the posterior band, recognizable by the change in orientation of the points from pointing backwards to pointing forwards.
Anal segment: Anal lobes posterior to three marginal setae with a short, broad triangular projection which is usually minutely toothed or scaled (027i.jpg).

Species keys out at Page 541: Diamesinae 17 Lappodiamesa of the Text Key.

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

Ecological notes
Far northern rivers.