Local feeder (Undetermined) in petioles of Acer

This record represents a small petiole swelling, less than 1 cm in diameter, of which I have found a single example. The culprit was gone and an exit hole was present when I observed the gall in late October. Multiple whitish mites inhabited the gall interior; I assumed they were inquilines who entered through the original inhabitant's exit hole. Considering that I found larvae of Proteoteras (Tortricidae) (record 0002, 0005) making somewhat similar damage to petioles of silver maple at the same location in June, it is possible this gall could be an aborted example of Proteoteras herbivory. The Proteoteras feeding in petioles generally seemed to involve an elongate tunnel that led from the swollen petiole into the main stem, and thus was not limited only to the swollen part of the petiole, whereas the internal hollowing in this gall was confined exclusively to the swollen area.