Maximum likelihood phylogenetic tree inferred from the dataset of ITS1–5.8S-ITS2 gene sequences from Coprinopsis cerkezii sp. nov. and related species. The new species is shown in blue. Maximum likelihood bootstrap values greater than 50% are indicated at the nodes. The tree is rooted with Coprinellus xanthothrix and C. domesticus. The bar indicates the number of nucleotide substitutions per site.