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Photo#398369
Mayfly

Mayfly
Morse Wildlife Preserve, Pierce County, Washington, USA
May 13, 2010
Size: ~ 9 mm

Moved
Moved from Mayflies. No insights, I didn't even know what that was! I'll email you the pic of the tails.

 
Probably Not Leptophlebiid
Lynette-

The photo you emailed me, even though not of the quality you would want to post, clearly showed only two tails, so my belief that it was in family Leptophlebiidae based on its forewing venation has been seriously undermined. Hate to do this to you, but please move it back to mayflies. That way, someone else, who might recognize what it is, will be more likely to see it.

 
Take one more look
at that photo. I studied it closely. There is a very slight(and hard to see) dip about half-way back on the tails. I believe that the middle tail is mostly hidden between the other two. If that's not a middle tail, then the back tail takes a very unnatural bend. I also think I just see three tails coming from the end of the mayfly. I know the picture is terrible, but if you look long enough...

 
Right
Lynette-

I believe you may be correct concerning the number of tails; just can't be certain.

Leptophlebiidae
Hi Lynette-

The forewing venation appears Leptophlebiid. Must admit, the strange placement of an egg cluster, and on what appears to be subimago, is a bit mystifying. Do you have any insight concerning what happened to cause that? Also, do you have a photo which shows the tails?

 
Comment Received From Lloyd Gonzales
Don’t think I can contribute anything to the ID, but might this be an example of abdominal bursting? That mechanism of parthenogenetic reproduction (in subimagos) was first described in a species of Eurylophella and is also reported to be found in an undescribed species (similar to Serratella) found on the Frying Pan in CO. The eggs are extruded in the same location as in this specimen through inflation of the midgut. David Funk, who did the research on Eurylophella oviruptis, might be interested in seeing this photo.

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