Phylogenetic relationships ofSphaerophoraceae (Ascomycetes) inferred from SSU rDNA sequences |
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| Authors: | Mats Wedin Anders Tehler Andrea Gargas |
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| Institution: | (1) Institut für Botanik, Karl-Franzens-Universität, Holteigasse 6, A-8010 Graz, Austria;(2) Present address: Botany Department, The Natural History Museum, Cromwell Rd, SW7 5BD London, UK;(3) Naturhistoriska Riksmuseet, Sektionen för Kryptogambotanik, P.O. Box 50007, S-10405 Stockholm, Sweden;(4) Department of Mycology, University of Copenhagen, Øster Farimagsgade 2D, DK-1353 Copenhagen, Denmark |
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| Abstract: | SSU rDNA was sequenced from the lichenized fungiBunodophoron scrobiculatum andLeifidium tenerum (Sphaerophoraceae), andStereocaulon ramulosum andPilophorus acicularis (Stereocaulaceae) and analysed by maximum parsimony with 44 homologous ascomycete sequences in a cladistic study. A small insertion (c. 60 nt.) was found in the sequence ofLeifidium tenerum. Sphaerophoraceae constitutes a strongly supported monophyletic group which groups together withLecanora dispersa and theStereocaulaceae. Together withPorpidia crustulata, this larger group is a sistergroup to thePeltigerineae. This analysis thus supports theLecanorales as monophyletic, includingSphaerophoraceae and thePeltigerineae, but does not provide strong support for this monophyly. The analysis also suggests that the prototunicate ascus in theSphaerophoraceae is a reversion to the plesiomorphic state. Based on morphological, anatomical and chemical reasons,Sphaerophoraceae is proposed to belong to one of the groups presently included in the paraphyletic suborderCladoniineae within theLecanorales. |
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| Keywords: | Fungi Ascomycetes Caliciales Lecanorales Sphaerophoraceae Stereocaulaceae Lichens molecular evolution phylogeny small subunit ribosomal DNA 18S rDNA |
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