Thank you! Looks perfect. What characters would you need to see for a species ID? I have the specimen. :)

are sufficient images for making a reasonably reliable species determination in the majority of carabid beetles, including this one. Some species may require ventral habitus plus closeups of other body parts. It helps a lot when images are high resolution and expandable like these and when body lengths (mandible tip to posterior tip) are measured in millimeters.

The commutablis-praetermissus species complex differs from other Pterostichus by this combination: Elytra with three dorsal punctures and without scutellar striae; Pronotum broad with well-rounded hind angles and with bilateral linear impressions deep and long. The three species in Argutor are distinguished by Bousquet & Webster (2004) in the article Review of the Nearctic species of the Holarctic subgenus Argutor. A free PDF is available by searching Google Scholar for the title.

Thanks! I read the article. The pictures are wonderful and it's easy to see differences side by side like that. I think P. commutablis looks like the right ID. I'll try to get pictures like the ones in the article and will post them tonight or tomorrow to confirm.