Pseudorthocladius sp.

Namayandeh, Armin, Bilyj, Bohdan, Beresford, David V., Somers, Keith M. & Dillon, Peter J., 2012, 3324, Zootaxa 3324, pp. 1-65 : 42-43

Pseudorthocladius sp.

Figs 33A–D

Diagnosis. Head with single rounded eyespot; SI seta serrated; premandible with one apical tooth and smaller inner tooth, without brush; antenna ( Fig. 33A) 5-segmented, 3 rd segment shorter than 4 th, blade about as long as flagellum, AR 0.9; mandible ( Fig. 33B) with 3 inner teeth, plus an apparent tooth next to the seta subdentalis; mentum ( Fig. 33C) with broad bifid median tooth and 4 lateral teeth, outer most tooth may become bifid; VM plate weak; setae submenti posteriad of VM plate; procercus strongly reduced with one very long thick seta, plus 2 very short fine setae; anal tubules long horn-like about twice as long as posterior parapod.

Notes. Very few Pseudorthocladius species are known in the larval stage and no larval key was included in the review by Saether and Sublette (1983). The mentum has a bifid 4 th lateral tooth, that may appear as two teeth. The head has just a single eyespot in this species, compared to the usual two in the Orthocladiinae .

Ecology and habitat. Larvae is found in mosses, bogs, springs and streams ( Epler 2001). In study streams larvae occurred only in the riffles.

Sampling sites. Collected from one stream (D1) in Algonquin Provincial Park

Nearctic distribution. Canada: Ontario.