Dasineura affinis


The larvae of the midge Dasineura affinis cause purple galls on the leaves of Viola riviniana, V reichenbachiana and possibly V canina.  The galls take the form of rolls on one or both sides of the leaf causing them to look like a pouch. The galls are sometimes hairy, with several adjacent leaves affected. On young leaves the rolls affect the whole leaf, but on older leaves only part of the blade is affected. The larvae are white when young later turning orange-yellow.

Similar Species

Very similar galls occur on Viola odorata and Viola hirta.

Identification difficulty

Gall  Adult

Recording advice

Ensure you have identified the host species of Viola correctly; provide photos of the host plant.  See our Wildflower species galleries for guidance on identifying Violets. https://www.naturespot.org.uk/family/violaceae


Where the host violet species occur.

When to see it

When the host violet species are in leaf.

UK Status

It appears to be widespread, but very poorly recorded in Britain.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map


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

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
28/10/2019 (Timms, Sue)
Last record:
25/09/2020 (Lewis, Steven)

Total records by month

% of records within its species group

10km squares with records

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Latest records