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Coleoptera - Coryphium nigrum

Coleoptera - Coryphium nigrum
Norfolk, Virginia, USA
February 1, 2009
Size: ~3mm
With springtail prey (or scavenged?). Found under piece of tree bark in the leaf litter.

Images of this individual: tag all
Coleoptera - Coryphium nigrum Coleoptera - Coryphium nigrum

Moved from Beetles.

Very cool, new genus for bugguide
This is Coryphium nigrum, a species in the subfamily Omaliinae. Species of this genus typically like it cold, which makes sense because it's winter. This was a fun challenge for me - keep up the weird litter Staphs!


I just wanted to add a couple
I just wanted to add a couple things:

1. The U-shaped impression at the base of the pronotum helps distinguish this specimen from rarely occurring, un-patterned individuals in the genus Epheli*nus
2. This is a rare species not known from Virginia and if you ever find more Scott, please send them to me so that I can voucher the range extension (MASS is the southern most record). Finding these in Virginia is strange indeed...

Thanks again for such a great photo of a rare find!


I Would Be...
happy to collect some of these for you if I can locate them. This coming winter I will make sure to search the area where I found this beetle and also get some better images as well.

thanks, Adam and Scott...
...for posting and decoding this one; great job!

nice rove -- no clue where to begin, looks weird
Ada-a-a-a-m!!! where are you?

Wow, this is a fun one
I'm leaning toward Omalii*nae, Euaesthet*inae or Oxytel*inae for this one..I should be able to give you an answer once I get into lab tomorrow. I can't see any ocelli on this one but there is something "Omalii*nae" to it.

Keep up the great photos,

something Omal... to it
i had the same feeling -- will follow developments

Thank you
for your time. I'm seeing quite a number of these rove beetles. Some are fairly easy to get good images of, but a lot of them are very quick to run for cover. Are these predators or scavengers?

Rove beetles are fun photographic challenges because they are fast and tricky to shoot. Most are small but I guess that isn't a problem for your lens! Most rove's are predaceous but some are herbivorous on algae. Others are known as saprophagous, straining out the micro-organisms in dung, rotting organic matter and fungusy wood. Scavenging is a rare occurrence and if there is prey in your rove's mouth it's probably their kill. There is a huge diversity in North America and Virginia is a good place to start.


Great info...
Thanks for the explanation. I was surprised to see that it had caught a springtail. A predator would have to be very stealthy to catch one of these, I would think.

I will try to find some more of these curious beetles this weekend. There were a couple that I did find, but were too quick to get a good in focus image of.

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