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The Lejeunea tumida species group is positively polyphyletic (Lejeuneaceae: Jungermanniopsida)

The Lejeunea tumida species group is positively polyphyletic (Lejeuneaceae: Jungermanniopsida) A phylogeny based on nrITS1 and trn L–F sequences resolves the Lejeunea tumida species group polyphyletic with individuals belonging in two clades either side of the basal-most node within Lejeunea . It is impossible for the Lejeunea tumida species group to be more polyphyletic and still be attributed to the same genus under the existing generic classification. A simulation-based approach to testing the null hypothesis of group monophyly rejects this at the P < 0.01 level of significance. Bayesian tests find very strong support for polyphyly, given the data. The monophyly of L. tumida s.s . + L. colensoana is fully supported; however, although Lejeunea tumida s.s . is nested within L. colensoana , this position is not supported. Both L. oracola and L. rhigophila are resolved as monophyletic. Whereas there is moderate support for the monophyly of L. rhigophila , there is no support for the monophyly of L. oracola . Neither is the monophyly of L. oracola + L. rhigophila supported in Bayesian or parsimony analysis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Systematic Botany CSIRO Publishing

The Lejeunea tumida species group is positively polyphyletic (Lejeuneaceae: Jungermanniopsida)

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References (98)

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
1030-1887
eISSN
1446-4701
DOI
10.1071/SB10047
Publisher site
See Article on Publisher Site

Abstract

A phylogeny based on nrITS1 and trn L–F sequences resolves the Lejeunea tumida species group polyphyletic with individuals belonging in two clades either side of the basal-most node within Lejeunea . It is impossible for the Lejeunea tumida species group to be more polyphyletic and still be attributed to the same genus under the existing generic classification. A simulation-based approach to testing the null hypothesis of group monophyly rejects this at the P < 0.01 level of significance. Bayesian tests find very strong support for polyphyly, given the data. The monophyly of L. tumida s.s . + L. colensoana is fully supported; however, although Lejeunea tumida s.s . is nested within L. colensoana , this position is not supported. Both L. oracola and L. rhigophila are resolved as monophyletic. Whereas there is moderate support for the monophyly of L. rhigophila , there is no support for the monophyly of L. oracola . Neither is the monophyly of L. oracola + L. rhigophila supported in Bayesian or parsimony analysis.

Journal

Australian Systematic BotanyCSIRO Publishing

Published: Apr 29, 2011

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