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Morphologically, the two corticoous species Rinodina pityrea and R. colobina are characterized by their dark blue-green blastidiate thallus and black plain or convex apothecia, with a light grey thallus margin. Rinodina pityrea and R. colobina are currently on the Swedish Red List as vulnerable (VU) and endangered (EN), respectively. They are hard to distinguish from Caloplaca chlorina in sterile
