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Caddisfly Genus Onocosmoecus (Great Late-Summer Sedges)

Taxonomic Navigation -?-
» Genus Onocosmoecus (Great Late-Summer Sedges)
Species in OnocosmoecusNumber of SpecimensNumber of Pictures
Onocosmoecus unicolorGreat Late-Summer Sedge320

1 species isn't included.
Common Names
MatchCommon Name
***Great Late-Summer Sedges
*Northern Caddisflies
Pictures Below ↓
The most common species of this genus is Onocosmoecus unicolor.  

Where & When


Time Of Year (?): Late summer and early fall

Preferred Waters: Lakes and slow streams

This genus is nearly as large as Dicosmoecus, but not quite as impressive because its emergence is less concentrated. It can still produce fishable hatches, especially in lakes.

Larva & Pupa Biology


Diet: Mostly detritus (Detritus: Small, loose pieces of decaying organic matter underwater.)

Current Speed: Slow or still



Pictures of 5 Caddisfly Specimens in the Genus Onocosmoecus:

Specimen Page:12
Onocosmoecus (Great Late-Summer Sedges) Caddisfly LarvaOnocosmoecus (Great Late-Summer Sedges) Caddisfly Larva View 17 Pictures
Collected May 10, 2008 from the Chena River in Alaska
Added to Troutnut.com by Troutnut on April 20, 2011
Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly LarvaOnocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Larva View 3 Pictures
Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly AdultOnocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Adult View 2 Pictures
Collected October 5, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on October 11, 2011
Specimen Page:12

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