Simo-Droissart M., Plunkett G. M., Droissart Vincent, Edwards M. B., Farminhao J. N. M., Jecmenica V., D'Haijere T., Lowry P. P., Sonke B., Micheneau C., Carlsward B. S., Azandi L., Verlynde S., Hardy O. J., Martos F., Bytebier B., Fischer E., Stevart T. (2018). New phylogenetic insights toward developing a natural generic classification of African angraecoid orchids (Vandeae, Orchidaceae). Molecular Phylogenetics and Evolution, 126, p. 241-249. ISSN 1055-7903.
Titre du document
New phylogenetic insights toward developing a natural generic classification of African angraecoid orchids (Vandeae, Orchidaceae)
Année de publication
2018
Auteurs
Simo-Droissart M., Plunkett G. M., Droissart Vincent, Edwards M. B., Farminhao J. N. M., Jecmenica V., D'Haijere T., Lowry P. P., Sonke B., Micheneau C., Carlsward B. S., Azandi L., Verlynde S., Hardy O. J., Martos F., Bytebier B., Fischer E., Stevart T.
Source
Molecular Phylogenetics and Evolution, 2018,
126, p. 241-249 ISSN 1055-7903
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.
Plan de classement
Sciences du monde végétal [076]
Description Géographique
AFRIQUE ; GUINEE BISSAU ; GUINEE ; LIBERIA ; COTE D'IVOIRE ; CAMEROUN ; GABON ; SAO TOME E PRINCIPE ; RWANDA ; KENYA ; TANZANIE ; AFRIQUE DU SUD ; MADAGASCAR ; COMORES ; REUNION
Localisation
Fonds IRD [F B010073622]
Identifiant IRD
fdi:010073622
