Calvelo, S. , E. Stocker-Wörgötter, S. Liberatore & J. A. Elix. Protousnea fibrillatae sp. nov. (Parmeliaceae, lichenized Ascomycota) from Argentina, southern South America. Mycotaxon 85: 277 - 287. 2003.

ABSTRACT:Protousnea fribrillatae from south-western Argentinean Nothofagus forests, is described as new to science. While the apothecia are typical of Protousnea, this new species is characterized by the presence of fibrils, a character previously unknown in the genus. The meta-depsides, subsekikaic and 4'-O-demethylsekikaic acids are reported the first time for Protousnea.

KEYWORDS: Protousnea fribrillatae, subsekikaic acid, 4'-O-demethylsekikaic acid, Patagonia, Nothofagus forest