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A new isidiate saxicolous species of Porina (Ascomycota, Ostropales, Porinaceae)

Published online by Cambridge University Press:  29 July 2020

Alan Orange*
Biodiversity and Systematic Biology, National Museum of Wales, Cathays Park, CardiffCF10 3NP, UK
Zdeněk Palice
Institute of Botany, Czech Academy of Sciences, Pruhonice, Czech Republic
Jon Klepsland
BioFokus, Gaustadalléen 21, NO-0349 Oslo, Norway
Author for correspondence: Alan Orange. E-mail:


Porina collina Orange, Palice & Klepsland is described as new from siliceous rocks in the Czech Republic, Great Britain and Norway. The thallus produces isidioid propagules which resemble those in P. rosei, P. hibernica and P. pseudohibernica, but which are more fragile and poorly-defined, and almost ecorticate; the perithecial wall is dark purplish brown and the ascospores are 3-septate. Sequences of the mitochondrial ribosomal DNA suggest that the new species belongs in the Porina byssophila clade.

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Copyright © British Lichen Society 2020

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