Aceria carvi (Nalepa, 1895)
leaf segments thickened, shortened, crumpled.
Aceria, Eriophyes, peucedani var. carvi.
The damage described above does not fit Daucus; there the inflorescence is galled, and the flowers are more or less greened. This sometimes is attributed to quite another gall mite, Aceria drabae. However, that species otherwise seems specialised on Brassicaceae. In fact, I do not know of any reference to an association of either mite species with Daucus in the acarological literature. So perhaps the background of the Daucus galls must be sought elsewhere.
Béguinot (2012a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Davis, Flechtmann, Boczek & Barké (1982a), Houard (1909a), Farkas (1965a), Hellrigl (2003a), Ripka (2007a), Skoracka, Lewandowski & Boczek (2005a), Stănescu (2009a), Tomasi (2012a, 2014a).