Mycena illuminans is a species of agaric fungus in the family Mycenaceae. It was first found on the trunk of Calamus in Jawa, Indonesia. It is bioluminescent.

The Mycenaceae are a family of fungi in the order Agaricales. According to the Dictionary of the Fungi, the family contains 10 genera and 705 species. This is one of several families that were separat