I found this dun on the same piece of stream as a similar spinner, probably of the same species.
This mayfly was collected from Mystery Creek #43 on September 19th, 2006 and added to Troutnut.com on October 4th, 2006.
Recent Discussions of this Dun
Looks like Leucrocuta
Posted by GONZO
on Oct 6, 2006
Haven't checked any keys to verify, but most of the little late-season Cahill-looking duns are Leucrocuta. If I had to guess at the species, I'd say hebe (Little Yellow Quill). It is probably the most common L. spp. in the East and has a long hatching period that extends well into the fall.Reply
I would also agree that the spinner you photographed is the same species.
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