Chromatomyia vernalis (Groschke, 1957)
The larva makes several mines, migrating form one leaf to the other through the heart of the leaf rosette. The beginning is a narrow, unbranchhed corridor with the frass as fine grains at either sides of a green central band. The mine widens into a large blotch with the frass in distinct thread fragments. Pupation external (unusual for a Chromatomyia).
Referred by Maček (1999a) also from G. cruciata, lutea.
Larvae in May and August (Hering, 1957a).
Not known from the Benelux countries (Fauna Europaea, 2009).
distribution within Europe
Germany (Fauna Europaea, 2009); furthermore Switzerland, Slovenia, Bulgaria (Černý & Merz, 2006a; Groschke, 1957a; Maček, 1999a).
The material from which this species was reared turned out two contain two different types of larvae; which of the two relates to vernalis is not known. Both types have been described by Hering (1955a).
Černý & Merz (2006a, 2007a), Groschke (1957a), Hering (1955a:280, 1957a), Maček (1999a), von Tschirnhaus (1999a).