Family: Tremellaceae Species: Tremella pertusariae Lichenicolous fungus, photographs on Pertusaria hymenea Photos: Killarney NP, Co. Kerry, SW Ireland. A lichenicolous basidiomycete that forms pale to dark brown or blackish galls (to 3mm diam) on the apothecia or less frequently the thallus of Pertusaria species. Basidia have transverse, oblique or longitudinal septa and most are distinctly stalked, 22-26 x 14-19µm (without stalk). Basidiospores subsphaerical, 8.5-11.5 x 7.5-10µm. Micrographs below. Lichenicolous on Pertusaria hymenea. Tremella pertusae forms more conspicuous galls on Pertusaria pertusa Similar: Acolium sessile (Cyphelium sessile) can appear similar but has brown, 1-septate spores and usually found on P. coccodes

Micrographs



Tremella pertusariae. August 2024