Orthocladius sym-pe1

new form

Diagnosis (Material leg. G.A. Halvorsen)
Exuviae 3.2, 3.3mm long (n=2).
Cephalothorax: Frontal setae absent. Thoracic horn 160, 190µm long (n=2); ThR 6.7, 7.9 (n=2). Four dorsocentral setae, the first, third and fourth thick, the second conspicuously thinner.
Abdomen: Hook row II a discrete pad or band of hooks, length 0.23x width of segment II, hooks 42 (n=1). Tergites IV-VI with a distinct median point patch (150i.jpg).
Anal segment: Anal lobe ratio 2, 2.2 (n=2). Length of anal macrosetae 0.69, 0.83x length of anal lobe (n=2).

This may be the pupa of Orthocladius annectens (q.v.).

Form keys out at Page 855: Orthocladiinae 266 Orthocladius of the Text Key.

(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes