Rohfritsch A. auteur aut IRD Payri Claude auteur aut IRD Stiger V. auteur aut IRD Bonhomme F. auteur aut IRD text journalArticle eng text/pdf born digital access We employed four markers (two chloroplastic, one mitochondrial and one nuclear) to investigate whether Turbinaria ornata and Turbinaria conoides, two morphologically similar brown algae, are distinct species. The molecular data revealed reciprocal monophyly, thus confirming the two algae as discrete species. Nevertheless, taxonomical ambiguities remain. T. conoides is more morphologically variable than T. ornata. We identified an atypical T. conoides morphotype whose blade possesses intramarginal teeth, a morphological characteristic of the T. ornata group that is normally absent within T. conoides. The molecular data indicate, nonetheless, that this morphotype belongs genetically to the T. conoides group. Thus, the results cast doubt upon the validity of using intramarginal teeth for species diagnosis. specialized elongation factor intergenic mitochondrial region ITS Rubisco sister species Turbinaria 076 35 2 91-98 2007 0305-1978 https://www.documentation.ird.fr/hor/fdi:010037853 10.1016/j.bse.2006.09.002 0305-1978 [F A010037853] https://www.documentation.ird.fr/hor/fdi:010037853 https://www.documentation.ird.fr/intranet/publi/2007/03/010037853.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2007-03-30 2017-08-23 fdi:010037853 fre