Fibroporia vaillantii with a wood moisture content of 40 to 50 percent. In humid atmospheres, the white cotton-like mycelium can grow on wood surfaces and cross inert materials, similar to the true dry rot fungus, "Serpula lacrymans". In newly grown mycelium, fine drops of clear liquid may be present. The optimal temperature for growth is ; it will grow at temperatures between . The fruit body is an irregular white plate with a thickness of 2 to 12 mm. Fibroporia vaillantii Fibroporia vaillantii, also known as mine fungus, white pore fungus, Antrodia vaillantii, Polyporus vaillantii, and various other names is a wood-decaying
Serpula divers and other casual observers. Following is a brief description of the cladistics and taxonomic classification of "Serpula": While the higher taxonomy is fairly well understood, the lower taxonomy within the genus "Serpula" is somewhat confusing, and not yet thoroughly worked out. Earlier sources have described as many as 77 different species and subspecies. However, there are currently only 29 recognized species in the genus "Serpula". The number and names of these species may soon change as a result of an ongoing revision of the genus by taxonomists. Worldwide,very common. Pacific, Atlantic, and Indian oceans, Mediterranean Sea, North Sea, Red