Cystiphora sonchi is a species of gall midge in the family Cecidomyiidae.

[1][2][3] It is native to Eurasia, but has been introduced to North America as a biocontrol of sow thistles.

[4] The larvae cause small, circular galls on the leaves of the host plants.

[4] This species was first described as Cecidomyia sonchi by Swiss entomologist Johann Jacob Bremi-Wolf in 1847.

This article related to members of the fly superfamily Sciaroidea is a stub.