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Photo#403940
Ground Beetle - Anisodactylus nigrita

Ground Beetle - Anisodactylus nigrita
McMinnville, Yamhill County, Oregon, USA
June 1, 2010
Size: 12mm long
We have had a lot of rain that forced this ground beetle inside. Temperatures have been in the 60s. There are a lot of these so I would appreciate some help in identification: Notiobia, Pterostichus, Anisodactylus, etc.... There is a unique crease down the thorax Thanks, Jake.

Images of this individual: tag all
Ground Beetle - Anisodactylus nigrita Ground Beetle - Anisodactylus nigrita Ground Beetle - Anisodactylus nigrita Ground Beetle - Anisodactylus nigrita Ground Beetle - Anisodactylus nigrita Ground Beetle - Anisodactylus nigrita

Moved
Moved from Anisodactylus.

 
cool.

Moved tentatively
Moved from ID Request.

plain dorsal view critical -- esp. pronotal closeup
cautious guess, 'something in the Pterostichini'

 
Ground Beetle ID
I added a few more pic. Hope this helps
jake

 
thanks--
the pronotum might (i so wish to see it sharper!)
the ventral view is hardly useful, though. you see, there are maybe 3 dozen pterostichine spp. in your area (out of a few hundred carabids) -- and many differ very subtly, one has to spend years looking at them before being able to distinguish most species without dissection
that's why you need shots like this to reasonably expect a name in this group:

(the first image shows a preserved and pre-IDed specimen)
so basically the best way is to collect those black ground beetles and ship to an expert -- great many carabid pages in the Guide show specimens examined by specialists

 
Ground Beetle
I have added the pronotum pictures. Hope this helps. I realize that there are many species. So If you are staying with Pterostichini, That should be sufficient. Thanks,

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