common species in Belgium.
larva makes a leafmine on Carpinus
betulus and Corylus
avellana. The mine differs a little
bit on both food plants; in Carpinus
the mine has a strong tendency to follow the veins, frass is a little
bit diffuser and in generall it's shorter and a little bit wider. In Corylus
the mine hasn't a strong tendency to follow the veins, it's longer and
frass is narrow linear. It pupates in a cocoon spun on detritus.
adults fly in two generations a year: late April-May and
mine: a narrow mine, not wider than larva, often very long and
angular and frass usually narrow linear. The mines of Stigmella
are sometimes very similar, but in this species the frass in the early
mine is broad and fills almost or completely the whole width of the
gallery. In S.
the frass is narrow linear leaving clear margins.
Luxembourg, Nassogne, 02 November 2006.
mine on Carpinus betulus
(Photo © Chris Steeman)