Appendix S1

Character analysis tree using Mesquite showing ancestral state reconstructions. Numbers show character state changes for nuclear characters (see Table 1). Genus and species names (see Table 2) abbreviated to first four letters. Tree shows three clades of zygomycetes (Mucoromycotina, Kickxellomycotina, Entomophthoromycota), three clades of traditional Chytridiomycota (Blastocladiomycota, Chytridiomycota, Monoblepharidomycota), and the position of the Dikarya, which includes the sister clades, Ascomycota and Basidiomycota. * Character state data missing. ()