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.