Silberfeld T. auteur aut IRD Bittner L. auteur aut IRD Fernandez-Garcia C. auteur aut IRD Cruaud C. auteur aut IRD Rousseau F. auteur aut IRD de Reviers B. auteur aut IRD Leliaert F. auteur aut IRD Payri Claude auteur aut IRD De Clerck O. auteur aut IRD text journalArticle eng text/pdf born digital access The brown algal genus Padina (Dictyotales, Phaeophyceae) is distributed worldwide in tropical and temperate seas. Global species diversity and distribution ranges, however, remain largely unknown. Species-level diversity was reassessed using DNA-based, algorithmic species delineation techniques based on cox3 and rbcL sequence data from 221 specimens collected worldwide. This resulted in estimates ranging from 39 to 61 putative species (ESUs), depending on the technique as well as the locus. We discuss the merits, potential pitfalls, and evolutionary and biogeographic significance of algorithmic species delineation. We unveil patterns whereby ESUs are in all but one case restricted to either the Atlantic or Indo-Pacific Ocean. Within ocean basins we find evidence for the vast majority of ESUs to be confined to a single marine realm. Exceptions, whereby ESUs span up to three realms, are located in the Indo-Pacific Ocean. Patterns of range-restricted species likely arise by repeated founder events and subsequent peripatric speciation, hypothesized to dominate speciation mechanisms for coastal marine organisms in the Indo-Pacific. Using a three-gene (cox3, psaA and rbcL), relaxed molecular clock phylogenetic analysis we estimated divergence times, providing a historical framework to interpret biogeographic patterns. specialized biogeography brown algae Dictyotales general mixed yule-coalescent model molecular phylogeny Padina Phaeophyceae species delineation MONDE ZONE TROPICALE ZONE TEMPEREE 034 082 020 49 1 130-142 2013 0022-3646 https://www.documentation.ird.fr/hor/fdi:010059019 10.1111/jpy.12027 0022-3646 [F B010059019] https://www.documentation.ird.fr/hor/fdi:010059019 https://www.documentation.ird.fr/intranet/publi/2013/03/010059019.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2013-04-02 2017-08-23 fdi:010059019 fre