A new species of Micarea, M. sambuci is described from western Europe. Though it was common in the Netherlands and also present in Belgium, Luxemburg, Germany, and Scotland, it could now be extinct. It differs from M. nitschkeana by the production of mesoconidia (2.7–4.1 × 1.1–1.5 μm) and complete absence of micro- and macroconidia. Key words: Lichenized ascomycete, Lecanorales, taxonomy.