Dogwood Rivet Midge - Craneiobia corni


The larvae of the midge Craneiobia corni cause galls on the leaves of Dogwood (Cornus sanguinea) and possibly on other Cornus species. The galls are flask shaped and obvious on both sides of the leaf, they are domed above, 3 to 5 mm across protruding below from midrib or side vein 8 to 10 mm, often several on a leaf. The galls are greenish yellow, often tinged pink or purple.

Identification difficulty

Gall  Adult

Recording advice

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Wherever Dogwood occurs.

When to see it

July to September.

UK Status

Not well recorded but thought to be locally frequent 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:
Craneflies, Gnats & Midges
Records on NatureSpot:
First record:
14/08/2016 (Grimes, Martin)
Last record:
14/08/2016 (Grimes, Martin)

Total records by month

% of records within its species group

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