Vieira C. auteur aut IRD De Clerck O. auteur aut IRD N'Yeurt A. D. auteur aut IRD D'Hondt S. auteur aut IRD Millet L. auteur aut IRD Kim M. S. auteur aut IRD Payri Claude auteur aut IRD Zubia M. auteur aut IRD text journalArticle eng text/pdf born digital access We re-evaluated the diversity of Lobophora using an integrative taxonomic approach based on a broad sampling across French Polynesian archipelagos. Our results show that French Polynesia supports at least 37 Lobophora species of which similar to 57% (21) are endemic. This level of endemicity is comparable to that presently known in the Caribbean and the western Indian Ocean, while French Polynesian coastlines cover a much smaller length. With a third of the species in common, French Polynesia shares considerable biogeographic affmities with the Melanesian Islands, situated over 4000 km to the west. Distribution ranges of a few species reach the western Indian Ocean, and two species also occur in the Atlantic. We hypothesize that Lobophora species in French Polynesia have mainly evolved into endemic species from colonizers originating from the Central Indo-Pacific. These rare dispersal events to ocean archipelagos followed by a long period of isolation and speciation represent an important process responsible for the high level of endemism in remote archipelagos. While south-eastern Pacific Islands could be considered an 'evolutionary graveyard' for the genus Lobophora as little local radiation occurred, this may simply be due to recent evolutionary history. Based on these new data, the diversity of Lobophora represents similar to 10% of French Polynesian seaweed diversity. Eighteen new species of Lobophora are here described from French Polynesia. specialized Algae cox3 molecular taxonomy new taxa psbA rbcL POLYNESIE FRANCAISE PACIFIQUE 034 [28 p.] 2022 0967-0262 https://www.documentation.ird.fr/hor/fdi:010085939 10.1080/09670262.2022.2092216 0967-0262 [F B010085939] https://www.documentation.ird.fr/hor/fdi:010085939 https://www.documentation.ird.fr/intranet/publi/2022-09/010085939.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2022-09-28 2022-09-28 fdi:010085939 fre