Acari: Eriophyoidea - gall mite Eriophyes homophyllus Photographs on Prunus spinosa, Blackthorn Host: Prunus spinosa Forms raised, hairy galls on the upperside of the midrib in the vein axils. Similar: Eriophyes similis

Eriophyes homophyllus
Studland Heath, Dorset. September 2014