I'm thinking more along the lines of Temnothorax. In any case, it's for sure a Crematogastrine.
I broadly agree, although I think the culprit is most likely Tetramorium.
You're probably right. Looking at it closer, I can see what look like the pronounced antennal scrobes seen in Tetramorium. If this is Tetramorium, I'd say it's something along the lines of T. simillimum. Maybe T. caldarium, especially if this is an individual accidentally transported from a more tropical area, such as Florida, where I've seen both species in the past.