Chromatomyia gentianella (Hendel, 1932)
Initinally a narrow, rather frequently branching, corridor; further on the corridor widens very strongly. The mine begins upper-surface, but the final section may have full depth patches. Frass in isolated, relatively large, grains; close together at first, widely scattered towards the end. Pupation within the mine; the anterior spiracula of the puparium penetrate the epidermis, mostly at the underside.
Gentiana acaulis, asclepiadea, cruciata.
Larvae in May and July (Hering, 1957a).
distribution within Europe
Poland, Switzerland, Austria, Italy, Slovenia, Bulgaria (Buhr, 1941b; Fauna Europaea, 2009; Maček, 1999; von Tschirnhaus, 1982a).
Beiger (2005a), Buhr (1941b), Černý & Merz (2007a), Hering (1957a), Maček (1999a), Süss (1992a), von Tschirnhaus (1982a).