Paratrichocladius skirwithensis

Author: (Edwards, 1929)

Exuviae 3.0-4.9mm long (n=7) (081-1.jpg).
Cephalothorax: Frontal setae and thoracic horn absent. Dorsocentral setae without great differences in breadth.
Abdomen: Hook row II more than 0.35x the breadth of tergite II. Segments II-VIII with conspicuous armament covering all or much of the tergites (081b.jpg). On tergites III and IV the lens-shaped area of enlarged points of the median patch forms, at least medially, the anterior margin of the median patch. Hooklets of apical bands III-V often smaller than the hooks of hook row II. Tergites VII and VIII with the postero-lateral corners devoid of points. Paratergites with row shagreen forming a reticulate pattern. Pedes spurii A and B absent.
Anal segment: Anal lobe ratio 1.5-2.0 (n=3). Anal lobes without fringe. Length of anal macrosetae 0.65-0.85x length of the anal lobe (n=3).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 883: Orthocladiinae 294 Paratrichocladius of the Text Key.

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

Ecological notes
Streams and lakes, mainly montane.
Stenothermal species, more frequently in krenon, rarely in rhithron. (Rossaro, 1990a)