Source: Frisch, A. & Holien, H. 2018. Arthonia toensbergii, a new lichenicolous fungus on Mycoblastus affinis from the boreal rainforests in Norway. Graphis Scripta 30 (6): 34–43. Oslo. ISSN 2002-4495. - CC BY-4.0
Arthonia toensbergii, microscopical characters. A, C Section through an ascoma on the thallus of
Mycoblastus affinis, showing the pigmentation of epi- and hypothecium and the arrangement of hyphae; B
Ascus apex in KI, showing the minute blue ring in the tholus; D–F Ascospores. Note the gelatinous perispore
of the young ascospore in D; G Ascus with ascospores. Scale bars: A = 50 μm; B, F, G = 10 μm; C = 100 μm;
D, E = 5 μm
Source: Frisch, A. & Holien, H. 2018. Arthonia toensbergii, a new lichenicolous fungus on Mycoblastus affinis from the boreal rainforests in Norway. Graphis Scripta 30 (6): 34–43. Oslo. ISSN 2002-4495. - CC BY-4.0
Mycoblastus affinis infested by A. toensbergii (Holien
7644, TRH-L-17501); scale bar = 1 mm.
