Table of Contents

During several excursions between 2013 and 2024 to the northern Apennines (including the Tyrrhenian coast near Donoratico) in the regions Lazio, Umbria, Marche, Toscana, EmiliaRomagna and Liguria, we visited 151 locations of potential lichenological interest. The results of these field studies are presented here. It comprises 140 taxa of lichenicolous fungi, 127 of which are non-lichenised, obligatory lichenicolous, validly described species. The new species Arthonia donoraticensis Brackel (Italy and France), Cercidospora appennina Brackel (Italy) and Pronectria lilae Brackel (Italy) are described. Provisional descriptions are given for Arthonia aff. subvarians (on Lecanora carpinea), Cercidospora sp. (on Seirophora villosa), Lichenoconium sp. (on S. villosa), Lichenostigma sp. (on Diplotomma hedinii), Muellerella sp. (on S. villosa), Polycoccum sp. (on Xanthoparmelia conspersa) and Zwackhiomyces sp. (on Collema fuscovirens). New to Italy are Abrothallus parmotrematis, Acremonium antarcticum agg., Cladophialophora denigrans, Codonmyces lecanorae, Cylindromonium lichenicola, Gonatophragmium licheniphilum, Lichenostigma rouxii, Parmeliicida pandemica, Phaeoseptoria peltigerae, Polycoccum alboatrae, P. thallicola, Sarcopyrenia gibba, Stigmidium leprariae, Trimmatostroma rouxii, Weddellomyces erythrocarpae, Xenonectriella zimmermannii, and Zwackhiomyces lithoiceae. Several species are new to the r...