although image dose not reveal necessary elytral seriate punctures to me. There are a lot of photographic and debris artifacts that hide the anticipated diffuse dorsal punctation.

Iustin, I'm posting this now because V. Belov asked me today to look at your curious image. I'm still way behind in processing the wet material from your last shipment received 3/14/16. Looking through your huge pile of wet packets, I could not find this particular specimen supposedly marked "BG1054746". Are you pretty sure you included that one? I'm plagued by too many other competing carabid projects during free time - most importantly manuscript writing on the Texas Selenophorus. At any rate, V. Belov had a good suggestion of possibly "S. discopunctatus". That would certainly be my second choice based on gestalt. If V. Belov is correct, discopunctatus would be a new TX state record.

no, it was not included in pack. I didn't keep it but I have some more pictures maybe somewhat better.
I made an experiment and I kept it a while try to see if I can feed it with boiled pasta. I gave it only boiled pasta and a little water in in small wet paper. Yes it eat boiled pasta and even seem to enjoyed but in final the body was soiled with pasta.
I never thought it could be so interesting :(
I added few pictures from May 6 and May 7, 2015.

on its identity since you have now some knowledge of Texas Carabidae? With your additional images I'm beginning to talk myself into seeing faint seriate punctures in elytral striae 2 & 5 and parts of dorsum densely punctulate. It appears to me that the dorsal surface is covered by shiny body grease - or is this some photographic artifact?

'shiny body grease' on pictures taken o May 6 and 7, 2015 is due to the boiled pasta. It enjoy to stay inside or covered with pasta. While this water-pasta layer can add artifacts in the same time it can highlight some details.
My way to take pictures is not very proper for macro, but I don't have other way for a bug which move all time. For carabids like some Selenophorus are a challenge to catch details in this way. Sometimes I take a lot of pictures trying to capture a moving insect or some details.
Now, I added a bunch of photos taken on April 9, 2015 (no shiny pasta on body), photos fast edited today for a new inspection. Definitely it has seriate punctures in elytral striae 2 & 5. I'm not able to see serial punctures on 7 strie but that not means it can't be.
When I found it I was sure it is something else, maybe A.punctatulus. Yesterday my first reaction was you have right about A.punctatulus. But I started to look again and I don know what to say. :(
I took a look to and I suspect that Belov can have right.
We talk here more thru the pictures that is the reason why I added so many.
If no needed the pictures can be frass anytime.

is now confirmed based on your extra good images. I trust all belong to the same individual. A. discopunctatus would not have diffuse punctation on elytra and on anterior half of pronotum as clearly now shown. I'm still waiting to find the first record of Texan A. discopunctatus before our paper is submitted for publication. You may begin frassing but save these helpful extra images: 1252823 -25 -27 -28 -30 -32 -34 -35 -36 -39 -40 -41. Thank you Iustin.