Where & When
» Species unicolor (Great Late-Summer Sedge)
Regions:This species is common in the Northwest and present but uncommon in the East.
East, Midwest, WestTime Of Year (?):
Mid-August to late OctoberPreferred Waters:
Rivers and lakes
Pictures of 3 Caddisfly Specimens in the Species Onocosmoecus unicolor:
Male Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Adult
View 15 PicturesI first just assumed this was Dicosmoecus based on anglers' conventional wisdom since it's a large orange "October caddis," but Creno set me straight. I should have keyed it out. After another look under the microscope, it lacks an anepisternal wart on the mesopleuron (Mesopleuron: The side of the insect mesothorax, and the part to which the fore wings are attached in mayflies.), which rules out Dicosmoecus. The midtibiae have 2 apical (Apical: Close to the apex; tip or end.) spurs and 1 pre-apical (Apical: Close to the apex; tip or end.) spur, and from there the color pattern of the wing points to Onocosmoecus. The location then narrows the species to unicolor.
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