rather common species in Belgium.
larva makes a leafmine usually on Rubus but also on Agrimonia, Fragaria, Filipendula, Geum and Potentilla.
Usually a very long sinuous gallery with broken linear frass or if
dispersed only one third of mine width. Grey-brown to greenish cocoon.
adults fly probably in two generations a year: late April-May and
July-August. The larvae of September-October are more numerous, so it's
possible that there is only one generation with a minority of
individuals emerging and reproducing ahead of the rest.
mine: there is a great overlap with mines between this species and Stigmella aurella, especially on Rubus and it's not easy to separate them. However there is a diagnose to give maximum chance for correct determination. In step-down order for S. splendidissimella;
frass in second part of gallery maximum half of width, frass in first
cm of gallery maximum half of width, mine makes in this first cm a
curve, mine crosses regularly itself and mine cross rarely the midrib.
Luxembourg, Nassogne, 02 November 2006.
mine on Rubus
(Photo © Chris Steeman)