Global diversity and phylogeny of Incrustoporiaceae (Polyporales, Basidiomycota) with an emphasis on .

This study presents the taxonomy and phylogeny of the family Incrustoporiaceae, based on comprehensive phylogenetic analyses utilising multi-gene data, including the internal transcribed spacer regions (ITS) and the large subunit of the nuclear ribosomal RNA gene (nLSU), for the accepted genera within Incrustoporiaceae. Additionally, a separate phylogenetic analysis focusing on the complex was performed using ITS sequences. A total of 20 new species within the genus are described, namely , , , , , , , , , , , , , , , , , , , and . Detailed illustrated descriptions, voucher specimens, hosts, distribution, diagnoses, and remarks are provided for these 20 new species. Additionally, two new combinations are proposed: and . Notably, our discoveries of and in Australia underscore the significance of expanding research on diversity in the Southern Hemisphere, where reports are scarce. Phylogenetic analyses also clarified the taxonomic positions of and within the Incrustoporiaceae family, showing that is nested within the polyphyletic clade. The morphological distinctions between and , as well as between and , are also discussed.