 According to a 2008 estimate, the Auriculariaceae contain 7 genera and over 100 species.Several species within the order are edible and two, "Auricularia auricula-judae" and "A. cornea", are cultivated on a commercial scale, particularly in China and southeast Asia.They are widely exported, in a dried or powdered state, as "black fungus", "cloud ears", or "wood ears".