Obryzum is a fungal genus in the monotypic family Obryzaceae, in the class Sordariomycetes. The relationship of this taxon to other taxa within the class is unknown (incertae sedis).

The genus name of Obryzum is derived from the Ancient Greek word ὄβρυζον‎ meaning pure gold.

Reported as a parasitic on cyanobacterial lichens from the genus Leptogium.

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