Differential sensitivities to the cell wall stress caused by Congo red (CR) have been observed in many fungal species. In this study, tolerances and CR was studied with an assorted collection of species from three phylogenetic classes: Sordariomycetes, Dothideomycetes, Eurotiomycetes, orders, eight families. These grouped into different ecological niches, such as insect pathogens, plant saprotr...