Multiclavula petricola

Multiclavula petricola is a saxicolous (rock-dwelling) basidiolichen in the family Hygrophoraceae. It is known only from a single subalpine site in central Japan, where minute, white, needle-like fruit bodies emerge directly from wet volcanic rock and are accompanied by a globular algal–fungal thallus. Microscopic characters, a distinctive globose photobiont association, and molecular data together justify its recognition as a separate species within Multiclavula.