Aculops macrotrichus

Alternative names
Aceria macrotricha, Eriophyes macrotrichus

The mite Aculops macrotrichus causes galls on the leaves of Hornbeam and Hop Hornbeam. The underside of the vein is modified into a way ridge with a slit like opening along the vein on the upperside. Several veins may be affected and leaves can become totally distorted.

Identification difficulty

Adult Gall

Recording advice

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 Hornbeam is present.

When to see it

When Hornbeam is in leaf.

UK Status

Status in Britain is difficult to determine due to lack of records.

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map