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Cloeon dipterum - male

Cloeon dipterum - Male
Rancocas Woods, Burlington County, New Jersey, USA
May 4, 2008
Size: Maybe around 8 mm?

Images of this individual: tag all
Cloeon dipterum - male Cloeon dipterum - male Cloeon dipterum - male


Well...the plot thickens
Thank you for mentioning the web, John! We make a pretty good team. Maybe I'm not so bad at reading keys after all. Not only does it seem that this is, indeed, the ovoviviparous Cloeon dipterum, but the other specimens (yours and Stephen Luk's) that I had previously identified as unusual Callibaetis specimens are the female imagines of this same species! I never would have connected the two. :)

Other images
It looks like there are quite a few more male and female images (appears dimorphic) already in Baetidae that would now be Cloeon dipterum.

I noticed that too. There's even one that has been sitting in the mayfly images for some time that I never would have suspected was even a baetid until I had a chance to become more familiar with this fascinating species.

Thanks again
This worked out great!

Moved from Mayflies.

Baetidae male subimago. Sometimes the male terminalia show pretty well in the subimago stage, but the cloudy gray wings and normal length of the forelegs indicates the "dun."

This has been fun, and really helped sort my images out!

Your pictures...
of this one are so good that it might be possible to take it to genus and maybe even species. Just keep in mind that this is speculation. Even though I can pretty much follow a key on this one, I sometimes trust my ability to recognize a familiar genus/species more than I trust my ability to interpret keys. I'm more practiced at the former than the latter. :)

I can't find a hindwing in any of your photos (which doesn't always mean it isn't there). The marginal intercalary veins are single. The combination of these two characters seems to point to the closely related genera Procloeon, Cloeon, and Centroptilum. If I am interpreting the description of the claspers properly, this would seem to be Cloeon. If that is the case, that genus is now monotypical in North America, and the single species, dipterum, is also common in Europe.

Pretty cool, if I didn't make a mistake. But given the potential for that, I'd leave it at Baetidae. :)

Thanks again
That is pretty cool, and it does match some of the images I have found on the web. I've changed the name to hopefully attract other opinions/confirmation.

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