The genus Dermatocarpon (Verrucariales, lichenized Ascomycotina) in the Nordic countries

Dermatocarpon (Verrucariales, lichenized Ascomycotina) in the Nordic countries is revised. The following 10 species occur: D. bachmannii, D. deminuens, D. leptophyllodes, D. leptophyllum, D. linkolae, D. luridum, D. meiophyllizum, D. miniatum, D, polyphyllizum, and D. rivulorum. Three varieties of D. miniatum, viz. var. miniatum, var, cirsodes, and var, complicatum, are also discussed. A key to the species is given, and distribution maps for all species are supplied. Useful characters for the recognition of different species are discussed.