Acari: Eriophyoidea - gall mite Aceria tenella Photographs on Carpinus betulus, Hornbeam Hosts: Carpinus betulus, C. orientalis and Ostrya carpinifolia Upperside bulge in the angle between veins, erineum with long, spiralled hairs below Other erinea on lower surface of leaves are at present unidentified

Aceria tenella
Upton Country Park, Dorset. September 2017