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Agathidium nigrinum Found this one walking about in a bathroom that I&#039;m rebuilding yesterday and put it in a tube to look at it better later. Once I had time to sit down for photos it had its wings unfolded (from trying to escape, no doubt) and wasn&#039;t trying to pull them back in anymore.<br />
With both keys available to me, I land on Agathidium (Cyphoceble) nigrinum, but that species is supposed to be 3-4mm (FHL) or even 3.4-4.7mm (Kilian &amp; Borowiec), whereas this specimen was hardly more than 2.5mm.<br />
Agathidium nigrinum is supposed to be a wide spread species but rare over all of its range (Caucasus/Europe). If my ID is correct (despite the size) this would probably be the first record for the province of Drenthe (6 other of 13 provinces so far).<br />
Will try to get confirmation.<br />
<figure class="photo"><a href="https://www.jungledragon.com/image/117052/agathidium_nigrinum_-_size.html" title="Agathidium nigrinum - size"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3043/117052_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1759968010&Signature=IU8hBTyrMMpHEN%2FP0XWdKodmlnc%3D" width="200" height="134" alt="Agathidium nigrinum - size To go with this image:<br />
https://www.jungledragon.com/image/117010/agathidium_nigrinum.html Agathidium,Agathidium nigrinum,Cyphoceble,Jane&#039;s garden,Leiodidae" /></a></figure><br />
 Agathidium,Agathidium nigrinum,Cyphoceble,Jane's garden,Leiodidae Click/tap to enlarge Promoted

Agathidium nigrinum

Found this one walking about in a bathroom that I'm rebuilding yesterday and put it in a tube to look at it better later. Once I had time to sit down for photos it had its wings unfolded (from trying to escape, no doubt) and wasn't trying to pull them back in anymore.
With both keys available to me, I land on Agathidium (Cyphoceble) nigrinum, but that species is supposed to be 3-4mm (FHL) or even 3.4-4.7mm (Kilian & Borowiec), whereas this specimen was hardly more than 2.5mm.
Agathidium nigrinum is supposed to be a wide spread species but rare over all of its range (Caucasus/Europe). If my ID is correct (despite the size) this would probably be the first record for the province of Drenthe (6 other of 13 provinces so far).
Will try to get confirmation.

Agathidium nigrinum - size To go with this image:<br />
https://www.jungledragon.com/image/117010/agathidium_nigrinum.html Agathidium,Agathidium nigrinum,Cyphoceble,Jane's garden,Leiodidae

    comments (3)

  1. Always love the dedication you put into the identification. Hope you find it. Posted 4 years ago
    1. Having used two different keys, both resulting in the same ID, I'm fairly sure it should be okay. Size may be an artefact of my beetle being alive (having a more hunched posture) and sizes in literature always being based on glued down specimen that may have been "streched out" to the limit, but I still don't think mine would quite reach 3mm that way...
      Agathidium nigrinum - size To go with this image:<br />
https://www.jungledragon.com/image/117010/agathidium_nigrinum.html Agathidium,Agathidium nigrinum,Cyphoceble,Jane's garden,Leiodidae

      If I rotate the bottom one (stretched posture while walking) a little better to align with the measure, it would just reach 2.8mm maybe.
      Posted 4 years ago, modified 4 years ago
      1. At the very least worthy of a tentative ID I imagine! Posted 4 years ago

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By Pudding4brains

Public Domain
Uploaded Jun 22, 2021.