This spinner was collected in proximity to this dun and this other dun, so one of them is likely the same species. Note for ID purposes that this one is missing one of its cerci (Cercus: The left and right "tails" of an insect are known as the cerci or caudal cerci. The middle tail of a three-tailed insect is not.).
This mayfly was collected from the Madison River on July 1st, 2019 and added to Troutnut.com on July 18th, 2019.
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