Rhizocarpon smaragdulum, a new monosporic yellow-thalline species and some additional species of the genus Rhizocarpon from the Altai Mountains (Siberia)
Rhizocarpon norvegicum is characterized by its small yellow thallus, margin reacting dark violet with KI, and 1-septate, small ascospores. It is distinguished from Rhizocarpon effiguratum and Rhizocarpon parvum by various morphological and chemical features. In the field, it may be confused with Rhizocarpon intermediellum, which has 3-septate to submuriform ascospores.[1]
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