Abstract
A new description of Didymium. subreticulosporum is provided that highlights its unique taxonomie characters—a discontinuous peridial wall, lack of didymioid capillitium, and the presence of an irregular membranous structure inside the sporotheca, filled with crystals. This species is considered succulenticolous due to its consistent fruiting on Opuntia cladodia in early stages of decay and restriction to this microhabitat. Spore dispersal is apparendy by cactophilic Drosophila flies.