a The genetic cluster was determine as a result of the phylogenetic analysis of the combined DNA sequences from the ITS and LSU regions. These are displayed in Figure 2, 3 and Suppl. Figure 1
b For contemporary material collected from field samples during this study specimens of Phyllachora from maize were assumed to be P. maydis and specimens from grass species were treated as unknown Phyllachora sp. For herbarium specimens we included the species name from the herbarium label.