Sphaerellothecium araneosum is a species of lichenicolous fungus in the family Phyllachoraceae.

[1] Sphaerellothecium araneosum has been reported from the highlands of Iceland[2] and the Arctic desert of Severnaya Zemlya in Russia.

[3] Sphaerellothecium araneosum commonly grows on species of Ochrolechia, such as Ochrolechia frigida[2] but it also grows on Stereocaulon rivulorum and Stereocaulon vesuvianum, on which it causes no known symptoms.

The population infecting Cladonia is considered a separate variety from other Sphaerellothecium araneosum.

This Sordariomycetes-related article is a stub.