Kessleria alternans

Kessleria alternans is a moth of the family Yponomeutidae. It is found in France, Switzerland and Italy. It has also been recorded from the Caucasus.

The length of the forewings is 8-9.2 mm for males and 6.7-8.1 mm for females. Adults have been recorded from mid to the end of July.

The larvae feed on Saxifraga oppositifolia and Saxifraga paniculata.