Dasineura fraxini

Description

Dasineura fraxini is a small gall midge that causes a gall to form on the underside of the main vein of Ash leaves. The area becomes swollen to form one or more pouches with a slit-like opening on the upperside, 5 to 30 mm long.

Similar Species

Dasineura acrophila causes the leaf to fold upwards into a 'pod'. 

Identification difficulty

Gall  Adult

Habitat

Found on Ash. The gall is seen more often than the insect itself.

When to see it

Gall is found from late May to October.

Life History

One small orange larva may be found in each pouch.  Pouches may coalesce.

UK Status

Fairly common and widespread in England at least.

VC55 Status

Fairly common in Leicestershire and Rutland.

Leicestershire & Rutland Map

MAP KEY:

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
Kingdom:
Animalia
Order:
Diptera
Family:
Cecidomyiidae
Records on NatureSpot:
101
First record:
04/06/2009 (Clough, Jerry)
Last record:
01/10/2023 (Smith, Peter)

Total records by month

% of records within its species group

10km squares with records

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