Abstoma is a genus of gasteroid fungi in the family Agaricaceae.
The type species, A. purpureum, was described from New Zealand by mycologist Gordon Herriot Cunningham in 1926.
to the genus in 1990,[3] but Moreno et al. proposed a new combination Disciseda stuckertii in 2007.
[4] A. fimbrialis was described from Baja California, Mexico, in 1992.
[5] A. townei is found in western and southwest USA and in west Argentina, while A. reticulatum occurs in Australia and the western and southwestern USA.