Pachycudonia is a genus of mushroom-forming fungi in the family Cudoniaceae.

[1] The Japanese mycologist Sanshi Imai originally proposed it as a section of the genus Cudonia, basing it on the species Cudonia constrictospora, and describing the main characteristic of the genus as Pileus convexo-hemiglobosus vel depresso-convexus, crassus ("Pileus convex to hemispherical or depressed-convex, thick.")

He later promoted it to distinct genus status in 1950.

[2] Pachycudonia has three species:[1] The distribution of the genus, when described by Imai in 1955, was restricted to Japan and the Pacific coast of North America.

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