The single most parsimonious tree generated from maximum parsimony analysis of the four-gene (ITS, TEF1, TUB2, and ACT1) combined dataset. Numbers in front and after the slash represent parsimony and likelihood bootstrap values from 1000 replicates, respectively. Values represented by an asterisk were less than 70 % for the bootstrap analyses. Ex-type isolates are indicated in bold. Bar indicates the number of nucleotide changes.