Basidiomycota: Amylocorticiaceae Athelia arachnoidea # Lichenicolous, photographs on Physcia tenella. Pathenogenic on various lichens and free-living algae, forming whitish rings on host thallii, tree trunks and damp walls. Forms whitish growths, the fruiting body thin and appearing 'cobwebby'. Brownish sclerotia sometimes present or less frequently two-spored basidia. Hosts include Xanthoria parietina and Lecanora conizaeoides

Athelia arachnoidea
On Physcia tenella. Kingston Lacy, Dorset. December 2015, November 2016