Aceria cerrea

Aceria cerrea mites cause galls on the leaves of Turkey Oak (Quercus cerris). These take the form of blister like bulges with a corresponding depression below which is felted with erineum hairs, some long.

Gall  Adult

Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Gall: Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.

Where Turkey Oak (Quercus cerris) occurs.

Galls can be seen when where Turkey Oak is in leaf.

It seems to be spreading in England and becoming more common.

Rare or rarely recorded in Leicestershire and Rutland.