Pseudopanurgus rugosus, collected by the glorious State of Virginia Natural Heritage group.
This whole group is a bit of a nightmare.
Uncommon, tiny, often very similar looking and widely ignored by taxonomists. I often have to leave them as sp….or as we say ‘spuh’. Which is not something that should be happening in this modern sophisticated, send-a-man-to-the-moon, sort of society. But it is. P. rugosus...not so difficult. Has ‘rugged’ topography on its back…thus its name.