Aceria ilicis


Aceria ilicis is a mite which causes felt galls to form on the leaves of Holm Oak. The upperside of the leaf may have a bulge about 2 to 3mm high, with a corresponding depression on the underside with a rusty brown erineum; usually several galls on a leaf; mites live amongst the hairs. The gall is seen more readily than the mite.

Identification difficulty

Adult Gall


On the leaves of Holm Oak.

When to see it

All year round.

UK Status

Seems to be fairly frequent but under recorded in Britain.

VC55 Status

Little recorded but probably fairly frequent in Leicestershire and Rutland.

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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