Marchandiomyces corallinus is a lichenicolous fungus that parasitizes lichens, particularly those in the genera Physcia, Parmelia, Flavoparmelia, Lepraria, Pertusaria, Lasallia, and Lecanora.

It is commonly found in eastern North America and Europe.

[1] Despite most lichen parasites belonging to the phylum Ascomycota (95%), M. corallinus is in the phylum Basidiomycota.

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