Simo-Droissart M. auteur aut IRD Plunkett G. M. auteur aut IRD Droissart Vincent auteur aut IRD Edwards M. B. auteur aut IRD Farminhao J. N. M. auteur aut IRD Jecmenica V. auteur aut IRD D'Haijere T. auteur aut IRD Lowry P. P. auteur aut IRD Sonke B. auteur aut IRD Micheneau C. auteur aut IRD Carlsward B. S. auteur aut IRD Azandi L. auteur aut IRD Verlynde S. auteur aut IRD Hardy O. J. auteur aut IRD Martos F. auteur aut IRD Bytebier B. auteur aut IRD Fischer E. auteur aut IRD Stevart T. auteur aut IRD text journalArticle eng text/pdf born digital access Despite significant progress made in recent years toward developing an infrafamilial classification of Orchidaceae, our understanding of relationships among and within tribal and subtribal groups of epidendroid orchids remains incomplete. To reassess generic delimitation among one group of these epidendroids, the African angraecoids, phylogenetic relationships were inferred from DNA sequence data from three regions, ITS, matK, and the trnL-trnF intergenic spacer, obtained from a broadly representative sample of taxa. Parsimony and Bayesian analyses yielded highly resolved trees that are in clear agreement and show significant support for many key clades within subtribe Angraecinae s.l. Angraecoid orchids comprise two well-supported clades: an African/American group and an Indian Ocean group. Molecular results also support many previously proposed relationships among genera, but also reveal some unexpected relationships. The genera Aerangis, Ancistrorhynchus, Bolusiella, Campylocentrum, Cyrtorchis, Dendrophylax, Eurychone, Microcoelia, Nephrangis, Podangis and Solenangis are all shown to be monophyletic, but Angraecopsis, Diaphananthe and Margelliantha are polyphyletic. Diaphananthe forms three well-supported clades, one of which might represent a new genus, and Rhipidoglossum is paraphyletic with respect to Cribbia and Rhaesteria, and also includes taxa currently assigned to Margelliantha. Tridactyle too is paraphyletic as Eggelingia is embedded within it. The large genus Angraecum is confirmed to be polyphyletic and several groups will have to be recognized as separate genera, including sections Dolabrifolia and Hadrangis. The recently segregated genus Pectinariella (previously recognized as A. sect. Pectinaria) is polyphyletic and its Continental African species will have to be removed. Similarly, some of the species recently transferred to Angraecoides that were previously placed in Angraecum sects. Afrangraecum and Conchoglossum will have to be moved and described as a new genus. specialized Angraecoid orchids Epidendroideae Molecular phylogeny Orchidaceae Paleotropics AFRIQUE GUINEE BISSAU GUINEE LIBERIA COTE D'IVOIRE CAMEROUN GABON SAO TOME E PRINCIPE RWANDA KENYA TANZANIE AFRIQUE DU SUD MADAGASCAR COMORES REUNION 076 126 241-249 2018 1055-7903 https://www.documentation.ird.fr/hor/PAR00017736 10.1016/j.ympev.2018.04.021 1055-7903 [F B010073622] https://www.documentation.ird.fr/hor/PAR00017736 https://www.documentation.ird.fr/intranet/publi/2018/07/010073622.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-09-03 2023-07-11 PAR00017736 fre