M. clitocyboidea M. fallax M. fusca M. marginata M. platyphylla M. rimosa M. rodmani M. subfurfuracea M. texensis Megacollybia is a genus of fungus in the family Marasmiaceae.

Previously thought to be monotypic, the genus was split into several species on the basis of genetic data in 2007 .

The type species, M. platyphylla, is restricted in distribution to Europe, Scandinavia, and western and central Russia.

[1] M. rimosa was described as new to science from Brazil in 2013.

This Marasmiaceae article is a stub.