Abstract
During a survey of culturable microfungi from the bark of sugar maple (Acer saccharum), Atrocalyx glutinosus and Nigrograna rubescens, two novel species of Pleosporales (Dothideomycetes) were isolated from several locations in eastern Ontario, Canada. Formal species descriptions are presented based on unique colony phenotypes and micromorphological characteristics and supported using multi-locus molecular phylogenetic comparisons with similar species. Both A. glutinosus and N. rubescens produce pycnidial asexual morphs in culture. As their names imply, under specific culture conditions, A. glutinosus excretes large amounts of the glutinous polysaccharide pullulan and N. rubescens produces a dark red naphthoquinone pigment that diffuses in the culture medium. Citation: Mack JN, Sproule A, Shields SW, Seifert KA, Smith M, Overy DP (2024). Two novel Pleosporales species isolated from the bark of Acer saccharum . Fungal Systematics and Evolution 13: 1-14. doi: 10.3114/fuse.2024.13.01.
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