Found under a broken slab of pavement piled by the side of the road, not dug from a burrow. I didn't notice anything resembling a turret or trapdoor next to the slab, but I could have easily missed it. Thoracic furrow doesn't look longitudinal to me, but I so rarely have a chance to see these spiders that I may not have a good sense for how pronounced that feature needs to be to make it something else.