Arthonia stereocaulina is a species of lichenicolous fungus in the family Arthoniaceae.
Distribution Arthonia stereocaulina has been reported from Alaska, Canada, Iceland, Russia and Svalbard.
Host species As the name suggests, Arthonia stereocaulina infects lichens of the genus Stereocaulon. Known host species are:
Stereocaulon alpinum Stereocaulon arcticum Stereocaulon botryosum Stereocaulon capitellatum Stereocaulon depressum Stereocaulon glareosum Stereocaulon groenlandicum Stereocaulon intermedium Stereocaulon myriocarpum Stereocaulon paschale Stereocaulon rivulorum Stereocaulon saxatile Stereocaulon tomentosum
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