This artice is free to access.
Phylogenetic taxon definitions (PTDs) are explicit, phylogeny-based statements that specify clades. PTDs are central to the system of rank-free classification that is governed by the PhyloCode, but they can also be used to clarify the meanings of ranked names. We present PTDs for four major groups: Fungi, Dikarya, Ascomycota, and Basidiomycota.
Hibbett, D. S., Blackwell, M., James, T. Y., Spatafora, J. W., Taylor, J. W., & Vilgalys, R. (2018). Phylogenetic taxon definitions for Fungi, Dikarya, Ascomycota and Basidiomycota. IMA Fungus, 9(2), 291–298. https://doi.org/10.5598/imafungus.2018.09.02.05