Eucosma aspidiscana (Hübner, 1817)
on Galetella, Solidago, Tripolium
initially the larva feeds on the flower heads, but later it bores down in the stem, that turns red, swells and is generally distorted. Buhr states that the larva pupates in the gall, but according to Bradley ao the larve hibernates in a cocoon outside, and pupates in the spring.
Bradley, Tremewan & Smith (1979a), Buhr (1964b, 1965a), Dauphin & Aniotsbehere (1997a), Szőcs (1977a), Tomasi (2014a).