Ametrodiplosis thalictricola
The larvae of the midge Ametrodiplosis thalictricola cause galls on the fruits of Common Meadow-rue (Thalictrum flavum). The fruits become swollen and egg-shaped with a thickened wall, they are ribbed and pointed and contain one or two yellow larvae instead of seeds.
Gall 
Adult 
There are no other species listed as causing galls on the fruits of Meadow-rue (current BPGS key: Redfern and Shirley 2011)
Provide a phot of the flowering head
Where Common Meadow-rue (Thalictrum flavum) is present.
Summer and autumn.
Usually bivoltine. The larva hibernates in the soil and pupates in spring.
It appears to be uncommon or under recorded in Britain.
It appears to be uncommon or under recorded in Leicestershire and Rutland.
David Gould
The Spearwort Fields
18 August 2016
galls on Meadow-rue
David Gould
The Spearwort Fields
14 September 2016
galls on Meadow-rue
David Gould
The Spearwort Fields
19 August 2018
on Common Meadow-rue
David Gould
The Spearwort Fields
19 August 2018
on Common Meadow-rue
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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:
- 3
- First record:
- 18/08/2016 (Gould, David)
- Last record:
- 19/08/2018 (Gould, David)
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