Order: Tremellales       Family: Tremellaceae Species: Biatoropsis usnearum Lichenicolous fungus. Photos: On Usnea. Glengarriff, Co. Cork, SW Ireland. Identification confirmed by Brian Coppins Parasitic, forming small, fleshy, pinkish-orange nodules on the thalli of Usnea species. The basidia have 1-3 transverse septa. Similar: Cystobasidium usneicola is also parasitic on Usnea and forms similar galls.

Biatoropsis usnearum on Usnea. January 2010