Orthocladius pe11

Form described by Langton, 1991

Diagnosis (n=3)
Exuviae 3.7-4.5mm long.
Cephalothorax: Thoracic horn 208-268µm long; ThR 6.5-7.1. Four dorsocentral setae, the first, third and fourth thick, the second conspicuously thinner.
Abdomen: Segments more or less evenly brownish. Hook row II a discrete pad or band of hooks, less than 0.34x width of segment II, usually of three or more transverse rows of hooks. Median point patch and posterior transverse point bands of tergites II-VI broadly joined laterally and usually medially as well (072h.jpg). Pedes spurii B absent. All five lateral setae of segment VIII particularly conspicuous, 0.41-0.49x the length of the segment, brown.
Anal segment: Anal lobe ratio 1.6-1.8. Anal lobes with a lateral fringe of sparse hair-like teeth and strong apical teeth. Anal lobes without taeniate fringe; anal macrosetae 0.71-0.86x lobe length, curved into a semi-circle, not hooked at tip.

Form keys out at Page 859: Orthocladiinae 270 Orthocladius of the Text Key.

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

Ecological notes
Assi River, 600m asl., Lebanon.