Family: Verrucariaceae Species: Telogalla olivieri Lichenicolous fungus on Xanthoria parietina Photos: Ahakista, Co. Cork and Kilcolman, Co. Limerick, Ireland Yellow or whitish-yellow galls form on the host thallus and become domed and irregular in shape as they develop. The immersed perithecia are visible as dark spots on the surface, brown or dark brown round the ostioles and internally with pale walls. The asci are 8-spored, the spores 15-20 x 4-7 µm, simple, hyaline and usually with 2-3 guttules (can appear septate in K). Micrographs below Only recorded on Xanthoria parietina and X. calcicola

Micrographs





Telogalla olivieri. August 2024