Discovery of the first resinicolous fungus in Mycosphaerellales (Dothideomycetes): from conifer resins in Poland.

Resinicolous fungi have evolved across different fungal lineages, but they are best known within the classes Eurotiomycetes, Leotiomycetes, Orbiliomycetes, and Xylonomycetes. Within the class Dothideomycetes, a resinicolous lifestyle is uncommon and is predominantly known in members of the order Mytilinidiales. In this study, 13 strains of a dark, slow-growing fungus belonging to Dothideomycetes were isolated from resins of four conifer species-, Larixdeciduassp.polonica, , and (all from the family Pinaceae)-in Poland. Based on multi-locus (LSU, ITS, , , ) phylogenetic analyses and morphological features, the isolated strains were identified as representing an undescribed species in a new genus within the order Mycosphaerellales, family Teratosphaeriaceae. Consequently, a new genus and species, , is described and illustrated. It is phylogenetically related to the genera and . The common occurrence of on resins of four different conifer species indicates its resinicolous lifestyle. is the first resinicolous fungus reported in Mycosphaerellales.