Marchandiomyces is a genus of fungi in the family Corticiaceae.
Marchandiomyces is named in honour of Louis (Ludwig) Marchand (1807-1843), who was a Luxembourger veterinarian, mycologist, lichenologist, and author.
Marchandiomyces corallinus is a lichenicolous species especially found on lichens of the genus Parmelia. Other species are lignicolous, forming inconspicuous, effused basidiocarps (fruit bodies) on wood.