Microascales comprises Ceratocystidaceae, Chadefaudiellaceae, Gondwanamycetaceae, Halosphaeriaceae, Microascaceae and Graphiaceae (Réblová et al. 2011, Maharachchikumbura et al. 2016b). In an outline of Ascomycota by Wijayawardene et al. (2018a), 99 genera have been accepted under Microascales, distributed in six families, but only 89 have molecular data (www.ncbi.nlm.nih.gov/Taxonomy/). A new genus Bretziella was introduced in Ceratocystidaceae by de Beer et al. (2017) to accommodate B. fagacearum. Microascales may be paraphyletic, due to the inclusion of Halosphaeriales (Zhang et al. 2006, Hibbett et al. 2007). However, in this study, Microascales formed a monophyletic clade and this agrees with Maharachchikumbura et al. (2015, 2016b) and Hongsanan et al. (2017). The divergence time for Microascales is estimated as 216 MYA (Fig. 2). Currently there are seven families and 110 genera in this order (Hyde et al. 2020).