Message - 7th IAL Symposium

The 7 th International Association for Lichenology Symposium 2012
(3A-P12) Submission ID: IAL0166-00002
PHYLOGENY OF MARINE VERRUCARIACEAE BASED ON MULTILOCUS ANALYSES
Heiðmarsson S. 1 , Gueidan C. 2 , Miadlikowska J. 3 , Thüs H. 2 , Lutzoni F. 3
1 Akureyri Division, Icelandic Institute of Natural History, Akureyri, Iceland
2 Botany Department, Natural History Museum, London, United Kingdom
3 Department of Biology, Duke University, Durham, United States
Verrucariaceae comprises mainly crustose lichens although some of its members can be squamulose,
foliose or even subfruticose. Lichenicolous lifestyle is furthermore found in this family. The genus Verrucaria was
for long suspected to be polyphyletic, which was confirmed with molecular methods by Gueidan et al. (2009).
Several species of Verrucaria s. lat. do occur on intertidal cliffs and rocks. Some species are also inundated most
of the time. Two new genera, Hydropunctaria and Wahlenbergiella, include these maritime species. In Iceland
12 species of Verrucaria s.lat have been reported growing in maritime habitats. Two of those species belong
to Hydropunctaria (H. amphibia and H. maura) while other two species belong to Wahlenbergiella, (W. mucosa
and W. striatula). Five loci were sequenced (ITS, ncLSU, mtSSU, RPB1 and Mcm7) from more than 30 maritime
specimens, mainly collected from the North Atlantic coast of Iceland in order to reveal the generic affinities of
the maritime species of Verrucaria s.lat. occurring in the North Atlantic. Furthermore several specimens where
included from coastal habitats of the southern hemisphere (Antarctica, Chile and Tasmania) to determine their
phylogenetic relationships. Phylogenetic analyses revealed that most of the maritime species belong to Wahlenbergiella,
Hydropunctaria on the other hand seems to comprise mainly species growing in freshwater habitats
except for H. amphibia, H. maura and the Mediterranean species H. adriatica.
(3A-P13) Submission ID: IAL0166-00003
DERMATOCARPON ARNOLDIANUM AND D. INTESTINIFORME IN CENTRAL EUROPE
Heiðmarsson S. 1 , Thüs H. 2
1 Akureyri Division, Icelandic Institute of Natural History, Akureyri, Iceland
2 Botany Department, Natural History Museum, London, United Kingdom
Dermatocarpon arnoldianum and D. intestiniforme, which have been proposed to be synonyms of D.
miniatum, were studied and compared to other specimens of the D. miniatum complex. The synonymization
were based on material from the Nordic countries and partly from North America while material from Central
Europe has not been studied earlier concerning the delimitation of the two taxa. Dermatocarpon arnoldianum
was described from northern Norway by Degelius in 1934 while D. intestiniforme was described by Körber from
Central Europe in 1859 as Endocarpon intestiniforme. The purpose of this study is to reveal whether the two
names represent monophyletic taxa that can be recognized by morphological characters. Phylogenetic analysis
based on four loci viz. ITS, LSU, RPB1 and Mcm7 where conducted. Eight specimens of the two species
from the Alps were sequenced for the study and compared to 46 other specimens belonging to the D. miniatum
complex from different locations world-wide. Substantial variation were detected in the sequences, especially in
the ITS. Morphological study was conducted and comparison made with type material of both taxa. The results
indicate that D. arnoldianum auct. in the Alps is an undescribed taxon, different from the Norwegian type, while
the identity of D. intestiniforme is more questionable.
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