Cinereomyces is a genus of resupinate (crust-like) fungi in the family Gelatoporiaceae. The genus was circumscribed by Swiss mycologist Walter Jülich in 1981. Species in the genus have a gray pore surface except for a whitish margin, and skeletal hyphae with gelatinized walls. As of June 2017, Index Fungorum accepts two species of Cinereomyces: the type, C. lindbladii, and C. dilutabilis. The latter species was transferred to Cinereomyces from Diplomitoporus in 2016.

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