Aceria macrochela
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.
Aceria aceriscampestris also causes galls to form on Field Maple, but the galls are smaller and not confined to vein axils - but indeterminate examples may be found
Gall 
Adult 
Only on Field Maple. State host plant and provide a photo
On the leaves of Field Maple.
Galls visible in summer.
Frequent and widespread in Britain.
Fairly frequent in Leicestershire and Rutland.
Graham Calow
Sapcote
21 July 2012
on Field Maple - upper surface
Graham Calow
Fosse Meadows, Sharnford
15 August 2014
galls on Field Maple
Graham Calow
Sapcote
26 September 2013
on Field Maple
Graham Calow
Sapcote
21 July 2012
on Field Maple - underside
Graham Calow
Sapcote
29 June 2013
gall on Field Maple
David Nicholls
Sheet Hedges Wood
02 May 2014
David Nicholls
County Hall
23 September 2014
with Aceria aceriscampestris (smaller scattered galls)
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
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UK Map
Species profile
- Species group:
- Mites, Ticks & Pseudoscorpions
- Kingdom:
- Animalia
- Order:
- Trombidiformes
- Family:
- Eriophyidae
- Records on NatureSpot:
- 191
- First record:
- 21/07/2012 (Calow, Graham)
- Last record:
- 28/10/2023 (Smith, Peter)
Total records by month
% of records within its species group
10km squares with records
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Latest images
Latest records
Peter Smith
Cropston
02 August 2015
Galls on field maple
Graham Calow
Sapcote
21 July 2012
on Field Maple - upper surface
Graham Calow
Burbage Common and Woods
10 October 2012
galls on Field Maple - underside
Graham Calow
Burbage Common and Woods
10 October 2012
galls on Field Maple
David Nicholls
Sheet Hedges Wood
02 May 2014
Mike Higgott
County Hall
24 June 2015
steven lewis
welby
26 September 2015
Craig Mabbett
Lutterworth Country Park Lutterworth
03 October 2015
