Scutellinia setosa is a species of apothecial fungus belonging to the family Pyronemataceae. Its fruit bodies are disc-shaped with thick black "hairs" (setae) around the cup rim. The smooth, ellipsoid, spores measure 11âÂÂ13 by 20âÂÂ22 üm and contain numerous oil droplets. The asci (spore-bearing cells) are roughly cylindrical, measuring 300âÂÂ325 üm by 12âÂÂ15 üm. Originally described from Europe, it is also found in North America and Central America, where it grows on the rotting wood of deciduous trees.