There were some small oaks planted around one of the etangs at Bellebouche, one in particular was only about 2ms high and covered in galls.
No interactions present.
I have noticed this with Common Spangle Gall on Oak planted over an old slag heap and with Bud Gall on Yew. They just pick on one tree and keep off the others.
Andricus fecundator is the correct name . This is one of its earliest posts in iSpot but is a Global one (Central France).
Andricus fecundatrix is, I think, the wasp causer but the taxonomy reaches well beyond my understanding.
I am wading through ALL the posts of the Oak Artichoke Gall before adding my own.
Even so the name Andricus foecundatrix may have been the right one in 2012
I added the ID to alert others to the up-to-date difficulties in naming this Organism - already consigned to History and with more than enough convincing agreements, this post has a Flawed ID Panel. There are too many of those in iSpot which may need more active Curation.
Lat/Lng: 46.7981, 1.3042