Aphanobasidium is a genus of corticioid or crust fungi in the Radulomycetaceae family. The genus has a widespread distribution and contains several species. This genus was formally considered to be part of the Pterulaceae family. A major reclassification of the Pterulaceae family occurred in 2020 and the genera Aphanobasidium, Radulomyces and Radulotubus were moved to a new family, Radulomycetaceae by the mycologists , and .