Source: Nordén, B. & Aptroot, A. 2018. Anisomeridium viridescens and Arthopyrenia callunae, two pyrenolichens new to Fennoscandia. Graphis Scripta 30 (10): 166–169. Oslo. ISSN 2002-4495. - CC BY-4.0
Arthopyrenia callunae. A: Ascospore with gelatinous perispore. B: Ascospore. C: Ascus. D:
Habitus on corticated stem of Calluna vulgaris. A–C in KOH. Scale bars: A, B: 10 μm, C: 20 μm. D: 2 mm.
Photos: M. Jäntti.
