Oxyna flavipennis (Loew, 1844)
on Achillea, etc.
gall
more or less globular, brown swelling at the root collar, up to 8 mm, often several together. The gall is unilocular and has a thick, fleshy wall. The solitary larve pupates in the ground.
host plants
Asteraceae, oligophagous
Achillea crithmifolia, millefolium, nobilis; Leucanthemum vulgare; Tanacetum corymbosum.
Also Echinops spinosissimus ?
references
Baugnée (2006a), Bellmann (2012a), Buhr (1964b), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Greve (1999a), Houard (1909a), Klasa, Kaczorowska & Soszyński (2011a), Koops (2013a), Kütük, Yaran, Torbali, ao (2019a), Lutovinovas (2014a), Merz & Kofler (2008a), Niblett (1940a), Redfern & Shirley (2011a), Roskam (1997a, 2019a), Smit (2010a), Spooner & Bowdrey (2012a), Tomasi (2014a), Tóth (1969a), White (1988a).