Message - 7th IAL Symposium

4A-O
Lichen: from genome to ecosystem in a changing world
(4A-O6) Submission ID: IAL0010-00001
PHYLOGENETIC STUDIES ON SOME GROUPS WITHIN TELOSCHISTACEAE
Vondrak J. 1 , Šoun J. 2 , Řiha P. 3
1 Department of Taxonomy, Institut of Botany, Prùhonice, Czech Republic
2 Department of Botany, University of South Bohemia, České Budějovice, Czech Republic
3 Department of Zoology, University of South Bohemia, České Budějovice, Czech Republic
Investigations of four groups of Teloschistaceae provided various surprising results. (1) Within the Caloplaca
aurantia, C. flavescens complex, four species were formerly recognized; two calcicolous and two coastal,
from siliceous cliffs. Our data, however, indicate that they form just one phylogenetic species. Caloplaca aurantia
and C. flavescens are well known and easily recognizable taxa, but they probably represent only phenotypes
of a single species. These usually occur together, but marginal populations may be formed by either one of the
phenotypes. (2) The species-rich group around Caloplaca xerica contains some species that have both sorediate
and non-sorediate populations. Although both populations of one species may grow together, they have independent
ecologies and distributions. In general, vegetatively reproducing populations are more abundant and more
widely distributed. (3) The Caloplaca aractina, C. haematites complex contains two formerly recognized species;
one corticolous, the other saxicolous. Our data show that, although the whole group is monophyletic, the corticolous
and saxicolous populations do not represent homogeneous groups, but form several intermixed lineages.
(4) Caloplaca communis, described from the eastern Mediterranean, and C. maritima, described from the Atlantic
coast of Europe, together form a single “ring species” distributed continuously along European coasts. Distant
populations differ genotypically, but populations from intermediate localities contain “intermediate genotypes”.
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