These stoneflies--abundant during midday--seemed at first to be flying around with plain yellow bodies, but on closer inspection turn out to have striking, fiery red abdomens. This one keys out to albertensis, gaufini, or lambda, but the key (Baumann et al 1977) doesn't include all current species.
This stonefly was collected from the Madison River on June 30th, 2019 and added to Troutnut.com on July 17th, 2019.
Recent Discussions of this Adult
Sweltsa? 1 Reply »
Posted by Taxon
on Jul 18, 2019
Hi Jason-ReplyAnyone able to ID this Chloroperlid?
My guess would be genus Sweltsa, of which I believe there to be ~8 species in MT. It looks pretty similar to a (mostly) dorsal view of Sweltsa townsesi, which is pictured in American Stoneflies: A Photographic Guide to the Plecoptera by Bill B. Stark, et. al. However, I believe that species is only present in the Northern Sierra Nevada Mountains of CA and NV.
I didn't do the best job taking pictures of key characteristics (such as wing venation), but I'm hoping somebody might be familiar with the striking color pattern. I'd love to know the species on this one.Reply
Start a Discussion of this Adult:
You must log in
at the top of the page to post. If you haven't registered yet, it's this easy: