A North American species of Dermatocarpon (Verrucariaceae) in the French Alps ? Several thalli of an apparently new representative of the Dermatocarpon genus for the European flora were collected in 2010 in a locality of the Mercantour National Park (Alpes-de-Haute- Provence, France). Their phenotype is similar to that of D. reticulatum. In particular, they feature a dark lower surface with short, more or less angular protuberances, typical of this species. However, molecular data are required to confirm the presence in Europe of this taxon, which is currently only known from western North America.