Leioderma is a genus of lichen-forming fungi in the family Pannariaceae.

The genus was circumscribed by the Finnish lichenologist William Nylander in 1888.

He assigned Leioderma pycnophorum as the type species.

[1] As of May 2024[update], Species Fungorum (in the Catalogue of Life) accepts nine species of Leioderma:[2]

This Peltigerales-related article is a stub.