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Pterostichus? - Pterostichus lama

Pterostichus? - Pterostichus lama
Nevada, Douglas County, California, USA
Size: 30mm
Pterostichus I think... pretty large too. The pronotum got damaged when collecting it.

Images of this individual: tag all
Pterostichus? - Pterostichus lama Pterostichus? - Pterostichus lama

At that size, most likely Pterostichus lama.

Thanks for the quick ID Eric,
Thanks for the quick ID Eric, Should I wait for Pete before moving to species level? I didn't think there could be that many Pterostichus that were as large as this one. Unfortunately I only found one and it got smacked with a hammer while peeling off bark :( That's why the pronotum is messed up, as is the abdomen, though you can't really tell. I figured since I damaged it so bad the least I could do was keep it and try to salvage it.

Everything is consistent with Pterostichus lama.
Kudos to Eric! I'm really not that familiar with the far western carabid fauna so I had to hit the books for this one. P. lama, restricted to Pacific Coast, may be the largest Pterostichus in North America. Image shows these characteristic features: swollen temples behind relatively small eyes, pronotal front angle projected, pronotal sides crenulate (finely jagged), no prominent punctures atop eltyra, dentiform (small tooth) projection at elytral shoulders. Thanks Will for adding this one to BugGuide. Perhaps similar to your own biomathematical background, my "other" life as mathematician has served me well in geobasing the Wisconsin carabid distributions.

Thanks Peter!
I may have already asked but is there anything you'd like me to collect for you?

for the offer to mail specimens. Currently I'm way behind on my Wisconsin carabid research that recently got sidetracked (happily) by Tom Murray's bunch of specimens from northeast. Northeast fauna is closer, more pertinent to my area, but are still demanding as they require some time to key out accurately. In general I tend to take a pass on far western & southern specimens unless there is a special need for identification. I would of course appreciate a good specimen of Pterosthichus lama (not in my collection) and so I leave that one up to you. Thanks Will.

I actually spend most of my year in Kansas collecting. I'd send you this specimen if you want it, but as you can see it's not in the best of shape. In light of my new geographic locale are there any genera or tribes you'd like me to look for? I have a knack for finding Pangaeus fasciatus if you'd be interested in one of those if I get some more... I don't collect Carabids other than Cicindelinae and Omophroninae, so anything I get is up for grabs!

States closer to WI
like KA would interest me more than farther states for their carabid fauna. Still, I would not refuse an intact Pterostichus lama bundled perhaps with other CA carabid samples as you come upon them. I already have Panagaeus fasciatus - rare in WI. I do have a special fondness for North American Harpalus so you might keep that in mind. Also Will, thanks for creating a bunch of new Guide pages for several forgotten carabid postings.

I will keep my eye out for co
I will keep my eye out for cool Carabids here then, especially Harpalus. I don't have an in tact Pterostichus lama, though I wish I did, the cracked pronotum makes me sad :(

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