The woolly galls on Q. fusiformis were often different sizes and unclear if they were different species. I collected a bunch, sectioned them, and I'm pretty sure they are all the same. The galls appear on the side of the midrib of the lower leaf surface, and is most commonly at a 45 degree angle to the leaf surface. Average size of the larger galls (4th pic) is 6mm and the naked gall measures around 2.5mm in length. One section revealed an adult in pupation. (Separate observation here: https://www.inaturalist.org/observations/65639364)
Original observation here: https://www.inaturalist.org/observations/65612520
The wool on the galls has shriveled up quite a bit since collecting. Several galls have visible exit holes now, but not larvae or wasps in the container. I cut into one that had larva in it, so I put them all back in the outside cage.
Partial sun exposure. Plants nearby. Growing out of sandstone.
Caught and cleaned before I could grab a camera, hence only having a head picture :(