suilloid

We calibrated two nodes in the Basidiomycota dataset using fossil data: (i) the Suillinae (Suillus pictus, Chroogomphus rutilus and Gomphidius roseus) were calibrated based on a fossil of a Pinaceae-associated suilloid ectomycorrhiza (~50 mya) [37 ]; (ii) the Tricholomatoid clade (represented by Panellus stipticus and Pleurotopsis longinqua) was calibrated using a fossil Archaeomarasmius leggetti (~90 mya) from mid-Cretaceous amber [38 ].