Bondarzewia guaitecasensis is a species of polypore fungus in the family Russulaceae that is found in South America.

Originally described as Polyporus guaitecasensis by German mycologist Paul Christoph Hennings in 1900,[3] it was transferred to the genus Bondarzewia by Jorge Eduardo Wright in 1964.

[4] The fungus is parasitic on species of Nothofagus.

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