Gall in flower heads. As the result of galling, the base of the flower head is usually enlarged; the conglomerate of galls lignified, hard. Larval chamber is round or slightly ovate, developing in seeds which are slightly swollen.
Biology. Monovoltine. Galls mature in June, larvae overwintering in galls and adults emerge next spring. Host plants: Scorzonera humilis L., S. purpurea L., S. rosea W.K. (Kierych, 1979), and S. parviflora Jacq. (Asteraceae) (Diakontschuk, 2003).

[Aulacidea] abdominalis (Thomson, 1877)
Host plants: Scorzonera humilis L., S. parviflora Jacq., S. purpurea L., S. rosea K.K. (Asteraceae).
Distribution: Palearctic, widespread.