Molecular phylogenies support taxonomic revision of three species of Laurencia (Rhodomelaceae, Rhodophyta), with the description of a new genus

  • Florence Rousseau Institut de Systématique, Evolution, Biodiversité (ISyEB), UMR 7205 CNRS, EPHE, MNHN, UPMC, Sorbonne Universités, Equipe Exploration, Espèces, Evolution, Muséum National d’Histoire Naturelle, case postale N° 39, 57 rue Cuvier, 75231 Cedex 05 Paris
  • Delphine Gey Outils et Méthodes de la Systématique Intégrative, UMS 2700 MNHN, CNRS, Service de Systématique Moléculaire, Muséum National d’Histoire Naturelle, case postale N° 26, 57 rue Cuvier, 75231 Cedex 05 Paris
  • Akira Kurihara Department of Botany, 3190 Maile Way, University of Hawaii, Honolulu, Hawaii, 96822
  • Christine A. Maggs Faculty of Science and Technology, Bournemouth University, Poole House, Talbot Campus, Poole, Dorset BH12 5BB
  • Julie Martin-Lescanne Outils et Méthodes de la Systématique Intégrative, UMS 2700 MNHN, CNRS, Service de Systématique Moléculaire, Muséum National d’Histoire Naturelle, case postale N° 26, 57 rue Cuvier, 75231 Cedex 05 Paris
  • Claude Payri Institut de Recherche pour le Développement (IRD), UMR ENTROPIE-IRD, UR, CNRS, BP A5, 98848 Noumea cedex, Noumea
  • Bruno de Reviers Institut de Systématique, Evolution, Biodiversité (ISyEB), UMR 7205 CNRS, EPHE, MNHN, UPMC, Sorbonne Universités, Equipe Exploration, Espèces, Evolution, Muséum National d’Histoire Naturelle, case postale N° 39, 57 rue Cuvier, 75231 Cedex 05 Paris
  • Alison R. Sherwood Department of Botany, 3190 Maile Way, University of Hawaii, Honolulu, Hawaii, 96822
  • Line Le Gall Institut de Systématique, Evolution, Biodiversité (ISyEB), UMR 7205 CNRS, EPHE, MNHN, UPMC, Sorbonne Universités, Equipe Exploration, Espèces, Evolution, Muséum National d’Histoire Naturelle, case postale N° 39, 57 rue Cuvier, 75231 Cedex 05 Paris
DOI: https://doi.org/10.5852/ejt.2017.269
Keywords: Laurencia caspica, Laurencia crustiformans, Laurencia flexilis, Ohelopapa, Osmundea

Abstract

The systematics of the Laurencia complex was investigated using a taxon-rich data set including the chloroplast ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (rbcL) gene only and a character-rich data set combining mitochondrial cytochrome oxidase 1 (COI-5P), the rbcL marker, and the nuclear large subunit of the ribosomal operon (LSU). Bayesian and ML analyses of these data sets showed that three species hitherto placed in the genus Laurencia J.V.Lamour. were not closely related to Laurencia s. str. Laurencia caspica Zinova & Zaberzhinskaya was the sister group of the remaining Osmundea Stackh. species, L. crustiformans McDermid joined Palisada and L. flexilis Setch. consisted of an independent lineage. In light of these results a new genus, Ohelopapa F.Rousseau, Martin-Lescanne, Payri & L.Le Gall gen. nov., is proposed to accommodate L. flexilis. This new genus is morphologically characterized by four pericentral cells in each vegetative axial segment; however, it lacks ‘corps en cerise’ in cortical cells and secondary pit connections between cortical cells, which are characteristic of Laurencia. Three novel combinations are proposed to render the classification closer to a natural system: Ohelopapa flexilis (Setch.) F.Rousseau, Martin-Lescanne, Payri & L.Le Gall comb. nov., Osmundea caspica (Zinova & Zaberzhinskaya) Maggs & L.M.McIvor comb. nov. and Palisada crustiformans (McDermid) A.R.Sherwood, A.Kurihara & K.W.Nam comb. nov.

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Published
2017-02-02
How to Cite
Rousseau, F., Gey, D., Kurihara, A., Maggs, C. A., Martin-Lescanne, J., Payri, C., de Reviers, B., Sherwood, A. R., & Le Gall, L. (2017). Molecular phylogenies support taxonomic revision of three species of Laurencia (Rhodomelaceae, Rhodophyta), with the description of a new genus. European Journal of Taxonomy, (269). https://doi.org/10.5852/ejt.2017.269
Issue
No. 269 (2017): Molecular phylogenies support taxonomic revision of three species of Laurencia (Rhodomelaceae, Rhodophyta), with the description of a new genus
Section
Botany
Copyright (c) 2017 Florence Rousseau, Delphine Gey, Akira Kurihara, Christine A. Maggs, Julie Martin-Lescanne, Claude Payri, Bruno de Reviers, Alison R. Sherwood, Line Le Gall

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