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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Furcatergalia » Pronggilled Mayflies (Leptophlebiidae)
Photo#46192
Mayfly nymph
Copyright © 2006 tom murray

Mayfly nymph
Bethlehem, Coos County, New Hampshire, USA
March 28, 2006
Size: 7mm
Found under a rock in a pool near a river.
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Contributed by tom murray on 29 March, 2006 - 11:42pm
Last updated 31 March, 2006 - 8:06pm

Leptophlebiidae: Paraleptophlebia maybe
Note the three caudal filaments. Unfortunately this specimen looks like the gills on the left side have been completely lost, and they are not really visible on the right side. My guess is Paraleptophlebia (they have small forked gills that are easily knocked off, or when out of the water they will be stuck to the sides of the body as they seem to be here), and they do look like this. You need to photograph them in the water to see the gills, which are critical for generic placement.

Stoneflies always have two caudal filaments, mayflies usually have three. When they do have two, they always have easily seen abdominal gills.
… Donald S. Chandler, 31 March, 2006 - 6:31pm login or register to post comments

 
Mayfly larva
Thanks for the info. I didn't know about the gills, so next time, I'll make sure it's in a little water.
… tom murray, 31 March, 2006 - 8:07pm login or register to post comments

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