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A new circumscription of the genus Ramboldia (Lecanoraceae, Ascomycota) based on morphological and molecular evidence

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The lichen genus Ramboldia is emended by inclusion of Pyrrhospora species containing the anthraquinone russulone in their apothecia and having a prosoplectenchymatous exciple. This is supported by anatomical characters. Phylogenetic analyses using maximum parsimony and Bayesian statistics of a combined data set of DNA sequences from nu LSU, mt SSU, and ITS gene regions revealed Pyrrhospora to be polyphyletic with the type species distinct from the russulone-containing Pyrrhospora species that clustered with Ramboldia taxa. The following new combinations are made: Ramboldia amagiensis, R. arandensis, R. aurantiaca, R. aurea, R. bullata, R. cinnabarina, R. gowardiana, R. griseococcinea, R. haematites, R. heterocarpa, R. laeta, R. lusitanica, R. manipurensis, R. russula, R. sanguinolenta and R. subcinnabarina. New to science are Ramboldia neolaeta Kalb & Elix and R. quaesitica Elix & Kalb. A key to all known species in the R. russula group is presented.

German
Die Flechtengattung Ramboldia wird emendiert durch den Einschluss von den Pyrrhospora-Arten, die in den Fruchtkörpern das Anthrachinon Russulon bilden und ein prosoplectenchymatisches Excipulum besitzen. Bestätigt wird dieses Vorgehen durch anatomische Merkmale. Phylogenetische Analysen (maximum parsimony und Bayes'ische Statistik) eines kombinierten Datensatzes von DNA-Sequenzen der nu LSU, mt SSU und ITS Genregionen ergaben Polyphylie von Pyrrhospora. Die Typusart der Gattung ist phylogenetisch getrennt von den Pyrrhospora-Arten mit Russulon, die mit Ramboldia-Arten clustern. Neukombinationen sind Ramboldia amagiensis, R. arandensis, R. aurantiaca, R. aurea, R. bullata, R. cinnabarina, R. gowardiana, R. griseococcinea, R. haematites, R. heterocarpa, R. laeta, R. lusitanica, R. manipurensis, R. russula, R. sanguinolenta und R. subcinnabarina. Neu beschrieben werden Ramboldia neolaeta Kalb & Elix und R. quaesitica Elix & Kalb. Ein Bestimmungsschlüssel aller bisher bekannten Arten der R. russula-Gruppe wird vorgelegt.
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Keywords: HAEMATOMMA; LECANORACEAE; MOLECULAR PHYLOGENY; PROTOPARMELIA; PYRRHOSPORA; RAMBOLDIA; SYSTEMATICS; TAXONOMY

Document Type: Research Article

Publication date: February 1, 2008

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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