Phyllocoptes sorbeus
Phyllocoptes sorbeus is a mite which causes galls to form on the leaves of Rowan (Mountain Ash). The galls are seen more often than the mites that cause them. There is a dense felt-like erineum (or tufts/carpet of hairs), on under- or upper-side of the leaf, in which the mites live. The erineum is whitish at first, then yellowish or pinkish.
Eriophyes pyri
Gall 
Adult
Phyllocoptes sorbeus has an erineum; the similar Eriophyes pyri has rounded pustules, with openings.
Good photos of the upper- and lower-surfaces of leaves are needed, showing the erineum. The host plant should be noted in the Comments box.
On Rowan.
The galls can be seen at any time when Rowan is in leaf.
Thought to be widespread and fairly frequent in Britain, though poorly recorded.
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Species group:
- Mites, Ticks & Pseudoscorpions
- Kingdom:
- Animalia
- Order:
- Trombidiformes
- Family:
- Eriophyidae
- Records on NatureSpot:
- 0
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.