Potthastia montium

Author: (Edwards, 1929)

Exuviae 6.0-7.0mm long (n=12).
Cephalothorax: Frontal setae 205-210µm long (n=10). Thoracic horn absent. Precorneal setae 1-3: 65-110; 87-140; 110-175µm long (n=10).
Abdomen: Hook row II absent. Apical transverse point bands present on tergites (II)III-VI only (028f.jpg), the apical transverse point bands separated from the posterior band by a point-free space; points of the posterior transverse bands smaller than those of the apical bands. Anterior dorsocentral seta many-branched.
Anal segment: Anal lobes posterior to three marginal setae with a short, broad triangular projection; projection smooth, though there is a patch of setaceous points ventral to the apical setae (028g.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 544: Diamesinae 20 Potthastia of the Text Key.

Holarctic species: Widespread in Europe (not Scandinavia).
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Montane lakes and streams.