The genus Cytospora includes fungal species that occur mostly on woody plants including angiosperms and gymnosperms. Species of Cytospora (sexual morphs including Leucostoma, Valsa, Valsella and Valseutypella) have a cosmopolitan distribution and are most likely endophytes or latent pathogens in healthy plant tissues. They can also become important pathogens when their host trees are under stress (Schoeneweiss 1981, 1983). In this pathogenic phase, most Cytospora species cause canker diseases (Sinclair et al. 1987, Farr et al. 1989, Fan t al. 2020). The sporocarps of these fungi are then found on the dying wood associated with these cankers.