Mycena holoporphyra is a species of agaric fungus in the family Mycenaceae. It was first described by Miles Joseph Berkeley and Moses Ashley Curtis in 1868 as Agaricus holoporphyrus. Rolf Singer transferred it to the genus Mycena in 1962, where it is classified in the section Calodontes. First described from Cuba, it is also found in Trinidad, Africa, Mexico, and Central America and South America.