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Mayfly Nymph exoskeleton

Baetid

Photo by HemaShah
Published on Project Noah
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37.8944, -122.036

Field Notes

Description:

I found a few of these" exuva?" on a wooden exercise beam in the park. Very tiny. Probably 2mm long and 1/5th of a mm in diameter. Looks like an insect eclosed from here and the exit seems to be on top?

Habitat:

riparian.

Reference Links:

Baetidae

Species ID Suggestions

Comments (8)
luteum stenonema
From just the subimago exuvia it is near impossible to be sure. it does indicate 3 tails, size and time of years helps. It is either and most likely from Ephemerellidae , or Baetidae. The exuvia of adults if not often reviewed. I am looking closer and I think we can remove Ephemerellidae as the lateral spirical folds do not extend to projections from 4-9, it may actually be Callibaetis based on the projection on 7-8.
HemaShah
http://en.wikipedia.org/wiki/Baetidae#mediaviewer/File:Mayfly_ecdysis.jpg
HemaShah
logan,I think you are correct. Compare with this link!! http://www.naturebob.com/zenphoto/index.php?album=Insects/mayflies&image=mayfly-nymph-exoskeleton.jpg
LuckyLogan
It looks like a Mayfly Nymph exoskeleton minus the head, which a is were they exit I believe
Photographed
PublishedJuly 28, 2013

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