? on Acer pseudoplatanus

unknown gall on Acer pseudoplatanus

Acer pseudoplatanus, France, dép, Nord, Ghyvelde, 5.vii.2019 © Sébastien Carbonelle

unknown eriophyid gall on Acer pseudoplatanus

Acer pseudoplatanus, Zeewolde, Harderbos © Hans Jonkman

unknown eriophyid gall on Acer pseudoplatanus

detail upperside

unknown eriophyid gall on Acer pseudoplatanus

detail underside: not just the opening, but also the inside of the gall was hairy

unknown eriophyid gall on Acer pseudoplatanus

Acer pseudoplatanus, Belgium, prov. Liège, Vivegnis © Jean-Yves Baugnée

notes

galls like these are described, but not named, by Buhr (1964b) or Roskam (2019a); according to them several authors associate them with Aceria macrorhyncha.

mod 5.ix.2019