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Gregorella, a new genus to accommodate Moelleropsis humida and a molecular phylogeny of Arctomiaceae

Published online by Cambridge University Press:  12 July 2005

H. Thorsten LUMBSCH ,
Ruth del PRADO  and
Gintaras KANTVILAS
H. Thorsten LUMBSCH
Affiliation:
Department of Botany, The Field Museum, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA
Ruth del PRADO
Affiliation:
Department of Botany, The Field Museum, 1400 S. Lake Shore Drive, Chicago, IL 60605, USA
Gintaras KANTVILAS
Affiliation:
Tasmanian Herbarium, Private Bag 4, Hobart, Tasmania 7001, Australia
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Abstract

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The phylogenetic position of the European crustose pioneer lichen Moelleropsis (Biatora) humida (Kullhem) Coppins & P. M. Jørg. is studied using partial sequences of the mitochondrial SSU and nuclear LSU rDNA of 64 ascomycetes, including sequences of all known species of Arctomiaceae. The analysis places M. humida in the Arctomiaceae with strong support as sister to the Tasmanian genus Wawea. The genus Arctomia is monophyletic and sister-group to the Wawea+Moelleropsis humida clade. The new genus Gregorella is described to accommodate Moelleropsis humida and the new combination Gregorella humida (Kullhem) Lumbsch is proposed. The ontogeny of the ascomata of Gregorella humida is similar to that of other Arctomiaceae, in that the generative tissue is formed on a thallus outgrowth. The Arctomiaceae did not cluster with the bulk of cyanobacterial lichens in the Lecanorales suborder Peltigerineae (or Peltigerales), but is part of Ostropomycetidae. The closest relative of Arctomiaceae could not be identified, since the relationships of major clades within Ostropomycetidae lacked support.

Keywords

Arctomiaceaeascoma ontogenycyanophilous lichensmolecular phylogeny
Type
Research Article
Information
The Lichenologist , Volume 37 , Issue 4 , July 2005 , pp. 291 - 302
Copyright
© British Lichen Society 2005