TAXONOMIC REVISION OF SARGASSUM (FUCALES, PHAEOPHYCEAE) FROM FRENCH POLYNESIA BASED ON MORPHOLOGICAL AND MOLECULAR ANALYSES(1)

© 2008 Phycological Society of America.

Bibliographische Detailangaben
Veröffentlicht in:Journal of phycology. - 1966. - 44(2008), 6 vom: 04. Dez., Seite 1541-55
1. Verfasser: Mattio, Lydiane (VerfasserIn)
Weitere Verfasser: Payri, Claude Elisabeth, Stiger-Pouvreau, Valérie
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Journal of phycology
Schlagworte:Journal Article French Polynesia ITS2 Sargassum biogeography cox3 molecular phylogeny rbcLS taxonomic revision
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520 |a An assessment of Sargassum in French Polynesia was done through the critical revision of the literature, type specimens, and specimens from type localities. Sargassum samples were newly collected, and four morphotypes were identified on the basis of morphological characters. Molecular analysis of the nuclear ITS2, chloroplastic partial rbcLS, and mitochondrial cox3 markers generated two clades and confirmed the recent divergence suspected between closely related species. Although 18 different epithets have been attributed to French Polynesian Sargassum since 1828, only three species are considered valid in this study. Most of these species were transferred to S. pacificum Bory, the only species present in the Society Archipelago, while S. obtusifolium J. Agardh was restricted to the Austral Archipelago, and S. echinocarpum J. Agardh was confirmed for the Austral and Gambier Archipelagos. A morphological identification key is provided, along with descriptions and illustrations for each polymorphic species. Moreover, the study of several regional collections underlined similar and low specific diversity among Sargassum populations in the southeastern Pacific. As a result of this study, we propose that S. bacciferum J. Agardh var. latiuscula Grunow, S. bisserula f. pacifica Grunow, S. boraborense (Grunow) Setch., S. mangarevense (Grunow) Setch., S. sociale (Grunow) Setch., and S. tahitense Grunow be considered as heterotypic synonyms of S. pacificum. Sargassum skottsbergii Sjöstedt, S. hawaiiensis Doty et Newhouse, S. divaricatum var. chilensis Grunow, S. obtusifolium J. Agardh f. chamberlainii Grunow, and S. obtusifolium J. Agardh f. lendigeroides Grunow are further regarded as heterotypic synonyms of S. obtusifolium 
650 4 |a Journal Article 
650 4 |a French Polynesia 
650 4 |a ITS2 
650 4 |a Sargassum 
650 4 |a biogeography 
650 4 |a cox3 
650 4 |a molecular phylogeny 
650 4 |a rbcLS 
650 4 |a taxonomic revision 
700 1 |a Payri, Claude Elisabeth  |e verfasserin  |4 aut 
700 1 |a Stiger-Pouvreau, Valérie  |e verfasserin  |4 aut 
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