Mayfly - Eurylophella - BugGuide.Net

Lloyd

I think the way it's holding it's tail up, it made a weird camera angle, and made it look shorter than it really is.

… tom murray, 25 July, 2009 - 2:01pm

Sorry, Tom and Roger...

the unusual compactness of the abdomen of this specimen caused me to overlook the obvious: it has a long 9th abdominal segment with long lateral projections. Viewed in that light, everything about it is consistent with Eurylophella: typical ruddy brown body coloration, tail markings, yellowish legs with dark spots on the coxae....You can even see the pale dorsal stripe bordered by fine dark lines that is found on many Eurylophella specimens. Although I am at a loss to explain what caused the contraction of the abdomen (dehydration?), I now believe that Eurylophella is the correct identification.

… Lloyd Gonzales, 25 July, 2009 - 2:00pm

Ephemerellidae

I'm sure this is an ephemerellid, but I don't recognize it. Perhaps Donald can come up with something.

… Lloyd Gonzales, 25 July, 2009 - 12:09am

Drunella?

Lloyd-

The unusually stout body would cause me to suspect Drunella. Do you see something that would rule out it being a D. walkeri female imago?

… Roger Rohrbeck, 25 July, 2009 - 12:52am

tails

This one has me stumped, Roger. The stout body does look very much like walkeri or tuberculata, although I expect imagos of those species to be larger (esp. females) and blackish, with darker legs (like this specimen). However, the tails are really what make me doubt that this is Drunella. I have never seen an Eastern Drunella imago (or subimago) with distinct colored bands on the tail articulations.

Jason has photos of a little "mystery sulphur" subimago that was collected in July and has a similarly stout body (here). That specimen has the tail bands and would probably look much like Tom's specimen as an imago, but that's as far as I have come down the road of clues for this one. Unfortunately, because this is a female, Dr. Chandler could have difficulty determining an identity from the specimen.

… Lloyd Gonzales, 25 July, 2009 - 12:26pm