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Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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Pupal exuvium - Symmerus (Ditomyiidae)
jgruber111
#1 Print Post
Posted on 19-12-2021 02:38
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Location: Madison, WI, USA
Posts: 355
Joined: 10.03.17

Found at Mayville Ledge Beech-Maple Woods SNA in east-central Wisconsin in northern USA on 31.VII.2021. Found projecting 3-4mm out of trunk of debarked fallen hardwood tree in mixed hardwood forest. Looked relatively fresh, so presumably the adult had emerged not too long before I found the exuvium. Initially I presumed it was dipteran. Coleoptera was suggested on Bugguide. Confirmation/correction appreciated.

Bigger pics here.
jgruber111 attached the following image:


[190.82Kb]
Edited by jgruber111 on 03-08-2023 15:22
 
www.flickr.com/photos/7432824@N07
jgruber111
#2 Print Post
Posted on 19-12-2021 02:39
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Location: Madison, WI, USA
Posts: 355
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Another view.
jgruber111 attached the following image:


[197.36Kb]
 
www.flickr.com/photos/7432824@N07
atylotus
#3 Print Post
Posted on 02-03-2022 13:07
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Location: Amsterdam, NL
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Looks more like Limoniidae to me
 
jgruber111
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Posted on 09-04-2022 21:29
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Location: Madison, WI, USA
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Thank you much!
 
www.flickr.com/photos/7432824@N07
jgruber111
#5 Print Post
Posted on 03-08-2023 15:28
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Location: Madison, WI, USA
Posts: 355
Joined: 10.03.17

Just wanted to give an update on this. I got confirmation from Even Dankowicz that this is genus Symmerus in Ditomyiidae. I recently got pics of an adult eclosing from such an exuvium - https://www.flick...078261696/.

There are also similar images out on iNat - https://www.inatu...id=1011029
Edited by jgruber111 on 03-08-2023 15:28
 
www.flickr.com/photos/7432824@N07
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