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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Brushlegged Mayflies (Isonychiidae) » Isonychia
Photo#829623
Brushlegged Mayfly - Isonychia - male
Copyright © 2013 Nancy Kent

Brushlegged Mayfly - Isonychia - Male
Wildwood Park; Radford, Virginia, USA
August 24, 2013
Is this another Brushlegged Mayfly in the Isonychia genus? It looks very much like one I submitted earlier this week. However, I had never seen one with its wings down. Is there any special reason for that posture? Its wings were up when I took photos of it earlier in the morning today. They were down when I returned to the wall.

Images of this individual: tag all
Brushlegged Mayfly - Isonychia - male Brushlegged Mayfly - Isonychia - male Brushlegged Mayfly - Isonychia - male
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Contributed by Nancy Kent on 24 August, 2013 - 2:34pm
Last updated 18 May, 2019 - 1:05pm

In process of metamorphosis
Hi Nancy-

I believe this photo was taken as the mayfly was in the process of metamorphosis from subimago to imago, which progresses from anterior to posterior. It appears (to me) that the imago wings are only partially withdrawn from the subimago's exoskeleton.

Some years ago, a Hexagenia mayfly underwent metamorphosis from subimago to imago while it was clinging to my finger, a process which took about 25-30 minutes to complete, and was fascinating to observe.
… Roger Rohrbeck, 24 August, 2013 - 8:59pm login or register to post comments

 
Hello Roger,
Today I returned to the wall when I had gotten photos yesterday. I have submitted a third image showing the exuvea.
… Nancy Kent, 25 August, 2013 - 11:35am login or register to post comments

 
How cool!
Roger, I very much appreciate your sharing that information. I feel fortunate to have recorded a part of that metamorphosis with my camera.
… Nancy Kent, 25 August, 2013 - 5:43am login or register to post comments

Moved
Moved from Mayflies.
… Roger Rohrbeck, 24 August, 2013 - 7:14pm login or register to post comments

Moved for expert attention
Moved from ID Request.
… Ken Wolgemuth, 24 August, 2013 - 6:15pm login or register to post comments

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