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Disentangling Lecania
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis focuses on phylogenetic, taxonomic, ecological, and conservation aspects of the crustose lichen genus Lecania (Ramalinaceae, lichenized Ascomycota). Lecania has previously been defined on basis of relatively few morphological characters, and the genus had never been treated in molecular phylogenies.

The molecular phylogeny of the genus is inferred from DNA sequences. Twenty-five species traditionally placed in Lecania are included in the study along with 21 species from closely related genera. Lecania is a polyphyletic genus. A well-supported monophyletic group containing 16 Lecania species, including the type species L. fuscella is discovered, i.e. Lecania s. str. Nine species formerly included in Lecania do not belong in the genus. A new species, L. belgica, is described.

The relationships of a group of morphologically similar Lecania species, i.e. the L. cyrtella group are investigated using morphological and molecular methods. Haplotype network and phylogenetic analyses indicate that the included species, as conceived in the morphological examinations, all are monophyletic. Two new species, L. leprosa and L. madida, are described, L. proteiformis is resurrected from synonymy, and the known range of L. prasinoides is greatly expanded.

The type species Lecania fuscella has become endangered in many countries. Twelve localities in Sweden where the species had been found historically are investigated, but L. fuscella is only recovered in one locality. The species composition in these 12 localities, 58 old and 5 new collections with L. fuscella is determined and analyzed. The vegetation community differs between the old and the new collections, and between the locality where the species is recovered and those where it is not. Lecania fuscella has not been able to adapt to environmental changes and now only appears in a specific type of vegetation community. The phylogenetic diversity of the species is calculated, but does not reflect the species’ evolutionary potential.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2007. , p. 42
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 333
Keywords [en]
Biology, Crustose lichens, Phylogeny, Taxonomy, Morphology, New species, Phylogenetic diversity, Rare species, ITS, mt-SSU, RPB2, IGS
Keywords [sv]
Biologi
Keywords [la]
Lecania, Ramalinaceae
Identifiers
URN: urn:nbn:se:uu:diva-8183ISBN: 978-91-554-6953-5 (print)OAI: oai:DiVA.org:uu-8183DiVA, id: diva2:170615
Public defence
2007-09-28, Lindahlsalen, EBC, Norbyvägen 18A, Uppsala, 09:00 (English)
Opponent
Supervisors
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2009-04-02Bibliographically approved
List of papers
1. Molecular phylogeny of the genus Lecania (Ramalinaceae, lichenized Ascomycota)
Open this publication in new window or tab >>Molecular phylogeny of the genus Lecania (Ramalinaceae, lichenized Ascomycota)
2007 (English)In: Mycological Research, ISSN 0953-7562, E-ISSN 1469-8102, Vol. 111, no 5, p. 581-591Article in journal (Refereed) Published
Abstract [en]

The molecular phylogeny of the lichen genus Lecaniawas investigated using nucleotide sequences from the mt-SSU rRNA, the ITS region of the nu-rDNA, and the RNA polymerase II second largest subunit. Forty-six species representing Lecania and other genera likely to influence the phylogeny were included in the study. Phylogenetic reconstructions were carried out using Bayesian inference, ML, and MP approaches. Lecania, as traditionally circumscribed, is not a monophyletic genus. However, a monophyletic group containing a large number of Lecania species, including the type species L. fuscella, was discovered in the analysis, and recognition of Lecania sensu stricto is suggested. L. baeomma, L. glauca, L. gerlachei, L. brialmontii, L. racovitzae, L. hyalina (alias Biatora globulosa), L. chlorotiza, L. naegelii, and L. furfuracea do not belong in Lecania s. str., although the latter two are closely related to Lecania s. str. Representatives of the genus Bilimbia form a well-supported group, as does the ‘Thamnolecania’ group containing the Antarctic ‘Lecania’ species, L. gerlachei, L. brialmontii, and L. racovitzae. An alternative to recognizing these two genera would be a wider circumscription of Bilimbia to include the ‘Thamnolecania’ group as well as affiliated taxa.

Keywords
ITS region, Lecanorales, Lichens, MCMC, RNA polymerase II second largest subunit, SSU mt-rRNA gene
National Category
Biological Systematics
Research subject
Biology with specialization in Systematics
Identifiers
urn:nbn:se:uu:diva-96136 (URN)10.1016/j.mycres.2007.03.001 (DOI)000247865900005 ()17512709 (PubMedID)
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2018-03-29
2. Lecania belgica van den Boom & Reese Næsborg, a new saxicolous species from Western Europe
Open this publication in new window or tab >>Lecania belgica van den Boom & Reese Næsborg, a new saxicolous species from Western Europe
2007 (English)In: The Lichenologist, ISSN 0024-2829, E-ISSN 1096-1135, Vol. 39, no 6, p. 499-503Article in journal (Refereed) Published
Abstract [en]

A new species, Lecania belgica, is described and illustrated. It is a saxicolous lichen known only from the type locality in Belgium. It is characterized by apothecia with pruinose, irregularly undulating discs, relatively short ascospores, and by having 12-16 spores in the asci. It was found on mortar together with Diplotomma alboatrum.

Keywords
Belgium, ecology, saxicolous, species nova, taxonomy
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-96137 (URN)10.1017/S0024282907007244 (DOI)000252672500001 ()
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2017-12-14Bibliographically approved
3. Taxonomic revision of the Lecania cyrtella group (Ramalinaceae, lichenized Ascomycota) based on molecular and morphological evidence
Open this publication in new window or tab >>Taxonomic revision of the Lecania cyrtella group (Ramalinaceae, lichenized Ascomycota) based on molecular and morphological evidence
2008 (English)In: Mycologia, ISSN 0027-5514, E-ISSN 1557-2536, Vol. 100, no 3, p. 397-416Article in journal (Refereed) Published
Abstract [en]

This investigation elucidates relationships within the Lecania Crytella group (Ramalinaceae lichenized Ascomycota) by employing morphological: anatomical and molecular methods. The morphological studies included eleven species of Lecania, L. cyrtella, L. cyrtellina, L. dubitans, L. erysibe, L. hutchinsiae, L. Leprosa, L. madida, L. prasinoides, L. sambrucina, L. sordida and L. sylvestris, and a key to the Species Plus species descriptions are provided. Lecania madida, a new species from the Pacific Northwest of North America, L. leprosa, a new species from eastern Europe, and L. sordida, a new species from Europe, are described here. The known range of L. prasinoides is greatly extended to include the Baltic countries, Nordic countries and western Canada. Lectotypes are designated for L. cyrtella and L. sambucina. Molecular relationships within the group were examined with haplotype network estimations and phylogenetic reconstructions. Part of the IGS region as well as the complete ITS region were sequenced and analyzed. Both the haplotype network and the phylogenetic analyses indicate that the included species, as conceived in the morphological examinations, all are monophyletic.

Keywords
haplotype network analysis, key to species, lichens, maximum parsimony; new species, species descriptions, statistical parsimony
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-96138 (URN)10.3852/07-080R (DOI)000258494800006 ()
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2017-12-14Bibliographically approved
4. The phylogenetic diversity of Lecania fuscella does not reflect its evolutionary potential
Open this publication in new window or tab >>The phylogenetic diversity of Lecania fuscella does not reflect its evolutionary potential
(English)Manuscript (Other (popular science, discussion, etc.))
Identifiers
urn:nbn:se:uu:diva-96139 (URN)
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2010-01-14Bibliographically approved

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