Bittner L. auteur aut IRD Payri Claude auteur aut IRD Maneveldt G. W. auteur aut IRD Couloux A. auteur aut IRD Cruaud C. auteur aut IRD de Reviers B. auteur aut IRD Le Gall L. auteur aut IRD text journalArticle eng text/pdf born digital access Systematics of the red algal order Corallinales has a long and convoluted history. In the present study, molecular approaches were used to assess the phylogenetic relationships based on the analyses of two datasets: a large dataset of SSU sequences including mainly sequences from GenBank; and a combined dataset including four molecular markers (two nuclear: SSU, LSU; one plastidial: psbA; and one mitochondrial: COI). Phylogenetic analyses of both datasets re-affirmed the monophyly of the Corallinales as well as the two families (Corallinaceae and Hapalidiaceae) currently recognized within the order. Three of the four subfamilies of the Corallinaceae (Corallinoideae, Lithophylloideae, Metagoniolithoideae) were also resolved as a monophyletic lineage whereas members of the Mastophoroideae were resolved as four distinct lineages. We therefore propose to restrict the Mastophoroideae to the genera Mastophora, Metamastophora, and possibly Lithoporella in the aim of rendering this subfamily monophyletic. In addition, our phylogenies resolved the genus Hydrolithon in two unrelated lineages, one containing the generitype Hydrolithon reinboldii and the second containing Hydrolithon onkodes, which used to be the generitype of the now defunct genus Porolithon. We therefore propose to resurrect the genus Porolithon for the second lineage encompassing those species with primarily monomerous thalli, and trichocyte arrangements in large pustulate horizontal rows. Moreover, our phylogenetic analyses revealed the presence of cryptic diversity in several taxi, shedding light on the need for further studies to better circumscribe species frontiers within the diverse order Corallinales, especially in the genera Mesophyllum and Neogoniolithon. specialized COI Corallinales Mastophoroideae LSU rDNA Phylogeny Porolithon psbA SSU rDNA 034 61 3 697-713 2011 1055-7903 https://www.documentation.ird.fr/hor/fdi:010054229 10.1016/j.ympev.2011.07.019 1055-7903 [F B010054229] https://www.documentation.ird.fr/hor/fdi:010054229 https://www.documentation.ird.fr/intranet/publi/2011/12/010054229.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2012-01-10 2017-08-23 fdi:010054229 fre