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Porina pseudohibernica sp. nov., an isidiate, epiphytic lichen from central and south-eastern Europe

Published online by Cambridge University Press:  07 August 2014

Mauro TRETIACH*
Affiliation:
Dipartimento di Scienze della Vita, Università degli Studi di Trieste, Via L. Giorgieri 10, I-34127 Trieste, Italy. Email: tretiach@units.it

Abstract

The epiphytic lichen Porina pseudohibernica is described as new. It is characterized by a richly isidiate thallus, 7–8(–9)-septate ascospores and the presence of periphyses. It resembles P. hibernica s. str., differing in the size and septation of ascospores, and in the dimensions of the terete, branched isidia. The new species was found fertile at a single site in the Carnic Alps (SE Alps, Italy), but it is also known in a sterile condition from scattered localities in the humid (sub-)montane belt of Slovenia, the Czech Republic and Ukraine, occurring on smooth bark of Fagus and Carpinus. Porina hibernica is restricted to the coastal lowlands of Atlantic Europe, and it prefers rather dry, base-rich bark of Quercus and Ulmus. The characters previously used to segregate the isidiate European Porina into the genus Zamenhofia are also discussed.

Type
Articles
Copyright
Copyright © British Lichen Society 2014 

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Porina pseudohibernica sp. nov., an isidiate, epiphytic lichen from central and south-eastern Europe
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