Orthocladius pe1

Form described by Langton, 1991

Cephalothorax: Four dorsocentral setae, the first, third and fourth thick, the second conspicuously thinner.
Abdomen: Hook row of segment II short, less than 0.34x width of segment II, usually of three or more transverse rows of hooks, or absent (its position occupied by a band of anteriorly directed spinules). Shagreen limited in distribution on tergites. Well-developed median point patches present on tergites II-VI.
Anal segment: Anal lobes often with additional teeth laterally or apically, fringe absent.

Note: Possibly the pupa of Orthocladius mixtus (Holmgren).

Form keys out at Page 852: Orthocladiinae 263 Orthocladius of the Text Key.