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The Lichen Genus Caloplaca in Polar Regions

Published online by Cambridge University Press:  28 March 2007

Ulrik SøChting
Affiliation:
Department of Mycology, Botanical Institute, University of Copenhagen, Ø. Farimagsgade 2D, DK-1353 Copenhagen K, Denmark.
Maria Olech‡
Affiliation:
Botanical Institute, Jagellonian University, Ul. Lubicz 46, P-31-512 Krakow, Poland.

Abstract

Extensive material of Caloplacafrom Arctic and Antarctic regions has been critically examined. A list of 49 species is presented for Arctic regions. They are presumed to have a more or less circumpolar distribution. Twenty-two species are listed from the Antarctic region, but about ten more, probably undescribed species, are present there. About one-third of the species in the Antarctic region are bipolar or widespread in cold regions; these include mainly terricolous and muscicolous species and none of them are maritime. It is assumed that migration of the bipolar or cosmopolitan species has taken place along the Andean mountain chain, whereas the maritime polar species have evolved separately in the two hemispheres. The Caloplaca species of the Antarctic region are provisionally assigned to the following distribution types: continental Antarctic, western Antarctic, insul-Antarctic and sub-Antarctic. Caloplaca exsecuta, C. saxicola and C. phaeocarpella are recorded as new to the Antarctic region. Caloplaca johnstonii (Dodge) Søchting & Olech, comb, nov., is established as the correct name of C. tenuis Øvstedal.

Type
Research Article
Copyright
Copyright © British Lichen Society 1995

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