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Phylogeny of the Micareaceae inferred from nrSSU DNA sequences

Published online by Cambridge University Press:  10 March 2004

Heidi L. ANDERSEN  and
Stefan EKMAN
Heidi L. ANDERSEN
Affiliation:
Department of Botany, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
Stefan EKMAN
Affiliation:
Department of Botany, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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Abstract

The phylogeny of the Micareaceae and the genus Micarea Fr. was studied using 39 nuclear small subunit ribosomal DNA sequences. Phylogenetic analyses were carried out using maximum parsimony, maximum likelihood, and Bayesian inference. A confidence set of trees was estimated using expected likelihood weights to investigate a series of hypotheses of monophyly. Tree topologies were very similar between methods and differed only in the placement of a few poorly supported branches. The results indicate that the Micareaceae in its current circumscription belongs in the Lecanorales, but that it is not monophyletic. Psilolechia, Micarea with a ‘non-micareoid’ photobiont, Micarea sensu stricto and Byssoloma form a paraphyletic grade in this study. Micarea sensu stricto and Byssoloma (Pilocarpaceae) form a strongly supported monophyletic group, which constitutes the sister group to the Bacidiaceae. Scoliciosporum A. Massal has sometimes been considered close to Micarea, but no support was found for that hypothesis.

Keywords

Bayesian inferenceexpected likelihood weightsLecanoralesmaximum likelihoodmaximum parsimonyMCMCMicareaMicareaceaephylogenyPilocarpaceae
Type
Research Article
Information
The Lichenologist , Volume 36 , Issue 1 , January 2004 , pp. 27 - 35
Copyright
© British Lichen Society 2004

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