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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Small Minnow Mayflies (Baetidae)
Photo#413542
Mayfly
Copyright © 2010 Ken Schneider

Mayfly
Bowers Park, Santa Clara County, California, USA
June 19, 2010
Size: ~ 6 mm

Images of this individual: tag all
Mayfly Mayfly Mayfly
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Contributed by Ken Schneider on 19 June, 2010 - 2:36pm

Another suggestion -
from Mark Melton: "95% sure it's a Centroptilum, probably bifurcatum. There are a lot of them in this area, especially in May and June".

From follow up email from Mark: "There's also a slight chance that baetid could be Baetis flavistriga. The only way to be absolutely sure would be to check the forewings under a microscope. Centroptilum spp. have 1 intercalary while Baetis spp. have 2. I've attached a drawing of wings that show this. The arrows in the drawing refer to the intercalaries. I still lean towards about a 95% chance of Centroptilum though".
… Ken Schneider, 30 June, 2013 - 9:04am login or register to post comments

Probably Diphetor hageni
There are (~19) species of non-Callibaetis-Baetids present in CA. Based on the clasper configuration, abdominal segment coloration, and numerous other factors, I believe it's probably a Diphetor hageni male imago, specifically the one which was once classified as Baetis devinctus, but am most anxious to hear what Lloyd Gonzales has to say about it.
… Roger Rohrbeck, 21 June, 2010 - 12:23am login or register to post comments

 
Thanks, Roger!
I'll leave it here for a bit longer in the hopes that Lloyd will take a look at it, then...
… Ken Schneider, 21 June, 2010 - 9:40am login or register to post comments

Moved
Moved from Mayflies.
… Ken Schneider, 19 June, 2010 - 2:59pm login or register to post comments

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