Nuevos registros de Dothideomycetes (Ascomycota) no liquenizantes de los bosques andino patagónicos de Argentina

Three species of non lichenized Dothideomycetes (Ascomycota) found growing on bark of native trees from the Andean Patagonian forests of Argentina are described. Melanomma subdispersum and Mytilinidion tortile are reported for the first time in South America. The distribution area of Mytilinidion andinense is expanded from Rio Negro province, where it was found the first time, to Chubut province. Descriptions, data on geographical distribution, habitat and illustrations are provided for the three species.