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.

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