Arthonia stereocaulinaArthonia stereocaulina is a species of lichenicolous fungus in the family Arthoniaceae.DistributionArthonia stereocaulina has been reported from Alaska, Canada, Iceland, Russia and Svalbard.Host speciesAs the name suggests, Arthonia stereocaulina infects lichens of the genus Stereocaulon. Known host species are:Stereocaulon alpinumStereocaulon arcticumStereocaulon botryosumStereocaulon capitellatumStereocaulon depressumStereocaulon glareosumStereocaulon groenlandicumStereocaulon intermediumStereocaulon myriocarpumStereocaulon paschaleStereocaulon rivulorumStereocaulon saxatile ''Stereocaulon tomentosum''