Eudonia mercurella

Eudonia mercurella is a species of moth of the family Crambidae. It is found in Europe, western China, Iran, Lebanon, Turkey, and north-western Africa.

The wingspan is 16–19 mm. The forewings are dark black variously mixed with brown and with a darker band along the distal edge of the pale antemedian line. The pale postmedian line is usually distinct against the dark ground colour.

The moth flies from June to August depending on the location.

The larvae feed on various mosses.

Phalaena mercurella described by Zetterstedt in 1839 was actually Eudonia murana.