This specimen (and a few others I collected but didn't photograph) appear to represent the first finding of Paraleptophlebia sculleni outside the Oregon Cascades, although it is not a monumental leap from there to the Washington Cascades. The key characteristics are fairly clear.This mayfly was collected from Mystery Creek #249 on July 25th, 2019 and added to Troutnut.com on July 26th, 2019.
This ventral view matches Figure 14 from Harper and Harper 1986, leading to the identification of Paraleptophlebia sculleni.
This specimen had three fragile tails, one of which came off during handling.
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