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2A-2-P Lichen: from genome to ecosystem in a changing world (2A-2-P12) Submission ID: IAL0204-00002 PARMOTREMA TINCTORUM AND P. PSEUDOTINCTORUM (PARMELIACEAE, ASCOMYCOTA) TWO SUPPORTED SPECIES Roca-valiente B. 1 , Divakar P.K. 1 , Ohmura Y. 2 , Crespo A. 1 1 Biología Vegetal II, UCM, Madrid, Spain 2 Botany, National Museum of Nature and Science (TNS), Tsukuba, Japan Parmotrema tinctorum (Despr. ex Nyl.) Hale has a tropical and sub-tropical distribution. Morphological and phylogenetic relationships have been studied in order to clarify whether the specimens from Asia could be a different species than specimens from Canarias Island. A total of 104 New sequences have been produced of nuclear ITS rDNA region and mitochondrial SSU rDNA from fifty-two specimens of Parmotrema tinctorum (Despr. ex Nyl.) Hale. We have included also a several related species of the genus as P. endosulphureum (Hillmann) Hale, P. andinum (Müll. Arg.) Hale, P. internexum (Nyl.) Hale ex De Priest & B.W. Hale and P. nilgherrense (Nyl.) Hale. The samples were collected from 9 worldwide locations: Canary Is., Japan, India, Nepal, Kenya, Mozambique, United States, Brazil and Costa Rica. Phylogenetic inference was performed using Maximum Parsimony analysis and Bayesian (MC) 3 tree sampling. Morphological features such as isidia, lobe morphology and upper surface maculation were studied under optical microscopy. Our results show two main conclusions: (I) All the samples from Canary Is., with some specimens from India, formed an independent well-supported monophyletic group. In contrast, some samples from India and all samples collected in Africans regions and in Japan formed another monophyletic clade with strong statistical support. (II) Two types of isidia are observed in the morphological search: a) Isidia thin cylindrical type that is mainly found on corticolous specimens. b) Isidia thick coarse type that is present on the specimens growing saxicolous. Samples bearing each type of isidia nested in two independent lineages. The samples with coarse isidia type are similar to those recognised by Des Abbayes as Parmelia pseudotinctorum that was considered synonym. We resurrect the name for this lineage. Parmotrema pseudotinctorum is distributed so far in Canary Is., Ethiopia, Guinea, Tanzania, Ivory Coast and India. The other lineage was identified as Parmotrema tinctorum distinctive in having thin cylindrical isidia and mainly growing corticolous, is widely distributed in tropical regions. 110
The 7 th International Association for Lichenology Symposium 2012 (2A-2-P13) Submission ID: IAL0238-00001 A PRELIMINARY TAXONOMIC STUDY OF HYPOGYMNIA (PARMELIACEAE) IN CHINA Wei X. 1 , Wei J. 1 1 Key Lab of Systematic Mycology and Lichenology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, People’s Republic of China The genus Hypogymnia (Lecanorales, Parmeliaceae) mainly distributes in the Northern Hemisphere, including about 110 species worldwide according to the latest statistics from Index Fungorum by the authors. In China, 43 species have been published up to now, besides, four new species have been found and will be published soon. The number of Chinese species of Hypogymnia accounts for about 43% of the total. The usnic acid containing species pair H. hypotrypa (Nyl.) Rassad. and H. flavida McCune & Obermayer are endemic to China-Himalaya, the former with soredia and the latter with apothecia commonly, to validate whether it really includes two separate species, we studied the species pair based on morphology, anatomy, chemistry, biogeography, and molecular biology. The results showed that H. hypotrypa and H. flavida should be conspecific, and H. flavida should be treated as the synonym of H. hypotrypa. Based on the nrDNA ITS sequences analysis, the genus Hypogymnia is confirmed as a separate monophyletic clade, and Cavernularia should be the synonym of Hypogymnia. Combining phenotype and genotype analysis of Hypogymnia in China, we think there are three additional important characters to delimit species: pruina, dorsal perforation, and conidia. Our study also showed that the lichens of Hypogymnia are mainly distributed in Southwest China, constituting over 80% of the total number of the species in China. The distribution of Hypogymnia shows that the Southwest region as the most abundant biology diversity region is also the diversity center of Hypogymnia. A preliminary geographical analysis of Hypogymnia in China showed that they belong to six elements: Cosmopolitan element, Circumpolar element, East Asian-North American disjunctive element, East Asian-Oceanian disjunctive element, East Asian element and species endemic to China. 111 2A-2-P
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The 7 th IAL Symposium 2012 Lichens
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Welcome Message The 7 th Internatio
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Report The 7 th International Assoc
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Message - 7th IAL Symposium

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