)Fr., also occupied a basal position to the Pleosporales, but was distant to the core group of Hysteriales and was designated as Pleosporomycetidae "incertae sedis".Taken together, classification emphasizing the transitional nature of the hysterothecium, studies in centrum ontogeny and recent molecular evidence, seems to indicate a basal phylogenetic position of the Hysteriales to the Pleosporales and emphasizes the need for further study of the group.