Figs 15A–F
Diagnosis. Head (Fig. 15A) yellowish brown; SI seta bifid; pecten epipharyngis consisting of 3 equal sized scales; premandible (Fig. 15B) simple without brush; antenna (Fig. 15C) AR 1.6; mandible (Fig. 15D) weakly rugose on outer margin; maxilla (Fig. 15E) with 1–2 rows of pinnate lamellae; mentum (Fig. 15F) with large distally triangular median tooth, about 4x width of 1 st lateral, 2 nd lateral reduced and pressed against the first; abdomen with well developed setal tufts.
Notes. The larva of this species is very similar to Cricotopus flavocinctus (Kieffer) but can be separated by the 1–2 rows of maxillary pinnate lamellae; whereas, in the latter species there are 3 rows, (Simpson et al. 1983).
Ecology and habitat. Larvae are both lotic and lentic. In the arctic the species is found on moss substrates in lakes and smaller bodies of standing waters (Oliver & Dillon 1997). In study streams they occurred in all habitats but mainly in pools.
Sampling sites. Massasauga, Arrowhead and Algonquin Provincial Parks and Parry Sound District.
Nearctic distribution. Canada: Nunavut, Yukon Territory, first Ontario record.