Publications des scientifiques de l'IRD

Lagourgue L., Puillandre N., Payri Claude. (2018). Exploring the Udoteaceae diversity (Bryopsidales, Chlorophyta) in the Caribbean region based on molecular and morphological data. Molecular Phylogenetics and Evolution, 127, 758-769. ISSN 1055-7903.

Titre du document
Exploring the Udoteaceae diversity (Bryopsidales, Chlorophyta) in the Caribbean region based on molecular and morphological data
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000446021300067
Auteurs
Lagourgue L., Puillandre N., Payri Claude
Source
Molecular Phylogenetics and Evolution, 2018, 127, 758-769 ISSN 1055-7903
The Udoteaceae family (Bryopsidales, Chlorophyta) is known to be highly diverse morphologically in the Caribbean region, but only few studies have studied its genetic diversity. Using an integrative taxonomic approach, this study aimed at (1) exploring the Udoteaceae species diversity using a combination of five DNA-based species delimitation methods and morpho-anatomical data for confirmation; (2) estimating the discriminatory power of traditional diagnostic characters using a morphology-based clustering method and statistical analyses focused on the genus Udotea; and (3) reconstructing the phylogeny of the family based on a multilocus analysis (tufA, rbcL, 18S rDNA). Our results revealed strong congruence between species hypotheses across delimitation methods and markers. Morpho-anatomical characters proved essential to validate these hypotheses, to assign species names and to unveil new species. Morphological analyses led to relevant results for accurately discriminating Udotea morphospecies. Siphon features and cortication were key characters to define supra-specific groups and to revise the taxonomy of the genus Udotea. Phylogenetic analyses confirmed the polyphyly of Udotea, Rhipocephalus and Penicillus, which led us to propose a revised definition of Udotea sensu stricto based on both genetic and morphological data. Finally, our study emphasizes the importance of combining genetic and morphological data for the taxonomic revision of the Udoteaceae, but stresses the need of including more taxa from other geographical regions to better resolve taxonomic issues.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
CARAIBE ; ZONE TROPICALE
Localisation
Fonds IRD [F B010074522]
Identifiant IRD
fdi:010074522
Contact