Marasmius crinis-equi F. Muell. ex Kalchbr. 1880

Known as "horse hair fungus" or "horse hair blight". Its mycelia form cords which are aerial, extending between branches and leaves in trees, forming a tangled mass. The cords are "smooth, tough, black... from one-tenth to one-eighth of a millimetre in diameter". Other Marasmius species also have the "horse hair" habit.

Marasmius crinis-equi is a plant pathogen. It is commonly known as the 'horse hair fungus', and appears on rainforest leaves as a wiry stipe with a delicate fruitbody. The cap of the fruitbody can be up to 4 mm in diameter, and is pale brown.