Aceria macrochela is a gall mite that causes solitary galls to form on the leaves of Field Maple. The galls are seen more often than the mite that causes them. The gall is rounded, 2 to 4 mm across, with hard walls often in angle between veins; inner surface with many-celled hairs.
On the leaves of Field Maple.
Galls visible in summer.
Frequent and widespread in Britain.
Fairly frequent in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015