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A catalogue of 424 taxa of lichens and lichenicolous fungi from Northern Portugal (Montesinho Natural Park, Serra da Nogueira and Rio Sabor Valley), is presented as a result of the SEL (Sociedad Española de Liquenología) field exploration.Melanohalea septentrionalis is recorded for the first time in the Iberian Peninsula, the list also includes 57 taxa that are new to Portugal.