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View Thread :: Identification queries :: Diptera (eggs, larvae, pupae)
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Pupal exuvium - Symmerus (Ditomyiidae)
#1 Print Post
Posted on 19-12-2021 02:38

Location: Madison, WI, USA
Posts: 343
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:

Edited by jgruber111 on 03-08-2023 15:22
#2 Print Post
Posted on 19-12-2021 02:39

Location: Madison, WI, USA
Posts: 343
Joined: 10.03.17

Another view.
jgruber111 attached the following image:

#3 Print Post
Posted on 02-03-2022 13:07
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Location: Amsterdam, NL
Posts: 1102
Joined: 29.05.09

Looks more like Limoniidae to me
#4 Print Post
Posted on 09-04-2022 21:29

Location: Madison, WI, USA
Posts: 343
Joined: 10.03.17

Thank you much!
#5 Print Post
Posted on 03-08-2023 15:28

Location: Madison, WI, USA
Posts: 343
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 -
Edited by jgruber111 on 03-08-2023 15:28
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Date and time
02 December 2023 23:26


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06.09.23 01:11
How to move a thread from "diptera" to "asilidae" ? i.e. (Tolmerus cf cingulatus)

17.08.23 15:23

17.08.23 13:54
Tony, I HAD a blank in the file name. Sorry!

17.08.23 13:44
Tony, thanks! I tried it (see "Cylindromyia" Wink but don't see the image in the post.

17.08.23 11:37
pjt - just send the post and attached image. Do not preview thread, as this will lose the link to the image,

16.08.23 08:37
Tried to attach an image to a forum post. jpg, 32kB, 72dpi, no blanks, ... File name is correctly displayed, but when I click "Preview Thread" it just vanishes. Help!

23.02.23 21:29
Has anyone used the Leica DM500, any comments.

27.12.22 21:10
Thanks, Jan Willem! Much appreciated. Grin

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Yes, dipterologists from far abroad, please buy your copy at veldshop. Stamps will be expensive, but he, the book is unreasonably cheap Smile

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