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Palicella, a new genus of lichenized fungi and its phylogenetic position within Lecanoraceae

Published online by Cambridge University Press:  09 July 2014

Pamela RODRIGUEZ FLAKUS  and
Christian PRINTZEN
Pamela RODRIGUEZ FLAKUS
Affiliation:
Department of Botany and Molecular Evolution, Senckenberg Research Institute, Senckenberganlage 25, D-60325, Frankfurt am Main, Germany. Email: [email protected]
Christian PRINTZEN
Affiliation:
Department of Botany and Molecular Evolution, Senckenberg Research Institute, Senckenberganlage 25, D-60325, Frankfurt am Main, Germany. Email: [email protected]
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Abstract

Non-saxicolous lecideoid lichens form a diverse and polyphyletic group of species with a worldwide distribution. The phylogenetic relationships of the taxa and major clades are still largely unresolved. Here we introduce a new genus Palicella Rodr. Flakus & Printzen for Lecidea glaucopa Hook. f. & Tayl. and two closely related species. Our molecular phylogenetic results, based on maximum likelihood and Bayesian phylogenetic trees, and a combined dataset of five gene loci (ITS, nrLSU, mrSSU, RPB1 and RPB2), indicate that Palicella forms a monophyletic clade sister to Lecanora symmicta and Pyrrhospora quernea. The new genus is characterized by biatorine apothecia, which are often darkened (by the pigment Cinereorufa-green), an exciple of radiating, narrow hyphae with strongly elongate lumina, a hymenium with branched and sparsely anastomosed paraphyses, an ascus with a broad axial body surrounded by a distinct darker staining layer, and narrowly ellipsoid ascospores. Atranorin is present in all, usnic acid in two and pannarin in one species of the genus. Three new combinations are proposed: Palicella filamentosa (Stirt.) Rodr. Flakus & Printzen, P. glaucopa (Hook. f. & Taylor) Rodr. Flakus & Printzen, and P. schizochromatica (Pérez-Ortega, T. Sprib. & Printzen) Rodr. Flakus & Printzen. The molecular phylogenetic analysis confirms that Lecidea hercynica Hauck & Schmull is a synonym of P. filamentosa. An identification key to the species is provided.

Keywords

combined analysisLecanoraLecanoralesLecidealecideoid lichenstaxonomy
Type
Articles
Information
The Lichenologist , Volume 46 , Issue 4 , July 2014 , pp. 535 - 552
Copyright
Copyright © British Lichen Society 2014 

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