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Stonefly, Periodinae?

Stonefly, Periodinae?
Osprey Landing, Umpqua River, about 10 miles downstream from Umpqua, Douglas County, Oregon, USA
March 21, 2017
Size: nearly an inch
Do both sexes have cerci?

Images of this individual: tag all
Stonefly, Periodinae? Stonefly, Periodinae?

Moved from Stoneflies.

Probably Isoperlinae, but I would need to examine the specimen under the scope to be sure. Yes, both sexes will have the cerci. This is a female. The males have different (genitalic) structures on the last abdominal segment.

Moved from ID Request.

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