Lighthouse Gall - Rondaniola bursaria


The midge Rondaniola bursaria causes galls to form on the leaves of Ground-ivy (Glechoma hederacea). The gall takes the form of a hairy cylinder up to 4 mm tall, often several on the upper surface of a leaf. The galls are initially green, later light red or brown. Each gall contains a single larva. Galls fall off the leaf in late summer leaving a neat, circular hole. The gall is recorded more frequently than the midge.

Identification difficulty

Adult Gall


May occur wherever Ground-ivy is found.

When to see it

Galls best looked for from late June to August.

UK Status

Widespread in the southern half of 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