Message - 7th IAL Symposium

2A-1-P
Lichen: from genome to ecosystem in a changing world
(2A-1-P5) Submission ID: IAL0178-00002
A MEGAPHYLOGENY OF THE LICHEN FAMILY GRAPHIDACEAE
Rivas Plata E. 1 , Parnmen S. 2 , Staiger B. 3 , Mangold A. 4 , Frisch A. 5 , Weerakoon G.S. 6 , Hernandez J.E. 7 ,
Caceres M.E. 8 , Kalb K.J. 9 , Harrie S. 10 , Lücking R. 2 , Lumbsch T. 2
1 Department of Biology, Duke University, Durham, Durham, United States
2 Department of Botany, The Field Museum, Chicago, United States
3 Botany, University of Regensburg, Regensburg, Germany
4 Botany, Universitat Duisburg-Essen, Essen, Germany
5 Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
6 Botany, University of Sri Jayawardenepura, Nugegoda, Sri Lanka
7 Plantas No Vasculares, Fundacion Instituto Botanico de Venezuela, Caracas, Venezuela
8 Biociencias, Universidade Federal de Sergipe, Itabaiana, Brazil
9 Botany, Lichenologisches Institut, Neumarkt, Germany
10 Botany, Botanischer Garten & Botanisches Museum Berlin-Dahlem, Berlin, Germany
We present an updated phylogeny of the lichen family Graphidaceae including more than 700
operational taxonomic units (OTUs) and up to three genes per OTU (mtSSU, nuLSU, RPB2). The combined
dataset was analyzed under a maximum likelihood approach using RAxML, including recoding of ambiguously
aligned regions with the method PICS-Ord and applying a mixed GTR and MULTIGAMMA model in RAxML. The
results were used to test the current classification within the family, from subfamily to subgeneric level, and to
show how well the molecular data resolve currently accepted species. The tree topology was also used to study
the evolution of selected phenotypic characters that are being used in classifications within the family, such as
excipulum carbonization, presence of a columella or periphysoids, ascospore types, and secondary chemistry.
One of the results is that secondary chemistry is relatively uniform within larger clades and also usually constant
within a species. The degree of carbonization of excipulum and columella is also species-specific, to a higher
degree than previously thought. Common species such as Ocellularia papillata and O. perforata were shown to
each represent several distinct species, in part not even closely related.
(2A-1-P6) Submission ID: IAL0178-00003
A NEW CLASSIFICATION FOR THE FAMILY GRAPHIDACEAE
(ASCOMYCOTA: LECANOROMYCETES: OSTROPALES)
Rivas Plata E. 1 , Lücking R. 2 , Lumbsch T. 2
1 Department of Biology, Duke University, Durham, Durham, United States
2 Department of Botany, The Field Museum, Chicago, Illinois, United States
A revised classification for the emended family Graphidaceae is proposed, based on recent
phylogenetic studies, including the finding that three previously separated families (Asterothyriaceae, Gomphillaceae,
Thelotremataceae) are nested within Graphidaceae and in part polyphyletic. The family comprises three
major clades which are here delimited as subfamilies Fissurinoideae, Gomphilloideae, and Graphidoideae. The
latter is composed of three major clades which are formally delimited as tribes Graphideae, Ocellularieae, and
Thelotremateae. In addition, three new genera are described to accommodate the Ocellularia clandestina (Clandestinotrema)
group, the Ocellularia cruentata group (Cruentotrema) and Myriotrema pycno-porellum (Pycnotrema).
Keys are provided for the species placed in the new genera.
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