Per Schletterer & Füreder (2008), Prosopistoma sedlaceki is only known species from the region. Is not on iNat.
Found in cool temperate rainforest dominated by Myrtle beech. All sub alpine area
Gall with exit hole on huckleberry oak (Quercus vacciniifolia).
I have no idea what this is. There's entire orders of tiny arthropods I'm not familiar with beyond name and general morphology, but still, it's strange to get good clean shots of a thing and still have no idea what I'm looking at.
Edit: We have a professional ID! https://bugguide.net/node/view/1977688/bgimage