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Ramalina arsenii, an additional new species in the R. pollinaria group in Western Europe

Published online by Cambridge University Press:  08 December 2021

Emmanuël Sérusiaux*
Conservation and Evolution Biology, InBios Research Center, University of Liège, Sart Tilman B22, Quartier Vallée 1, Chemin de la vallée 4, B-4000 Liège, Belgium
Pieter van den Boom
Arafura 16, 5691 JA, Son, The Netherlands
Nicolas Magain
Conservation and Evolution Biology, InBios Research Center, University of Liège, Sart Tilman B22, Quartier Vallée 1, Chemin de la vallée 4, B-4000 Liège, Belgium
Author for correspondence: Emmanuël Sérusiaux. E-mail:


Ramalina arsenii sp. nov. belongs to the R. pollinaria group and is easily recognized by its ITS barcode and several micro-morphological characters that are diagnostic in a European context: small size, less than 3 cm long; soralia developing on the underside of lobe apices; absence of excavate depressions on the lower side. Its ecological niche (i.e. rock outcrops and especially underhangs of slightly calcareous rocks, at low and mid altitudes) is also unique. Ramalina arsenii is frequent and locally abundant in France (Alps, Cantal) and Switzerland (western Alps), and is also known from Germany and the Spanish side of the Pyrenees.

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Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of the British Lichen Society

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