Acari: Eriophyoidea - gall mite Aceria macrochela Photographs on Acer campestre, Field Maple Hosts: Acer campestre, heldreichii, monspessulanum Rare on Acer platanoides, pseudoplatanus Galls usually in angle between veins. 2-4 mm wide with hard walls

Aceria macrochela
Sturminster Marshall and Pamphill, Dorset. September and November 2017