Molecular insights into species delimitations of Cryptocarya, Endiandra, and Beilschmiedia (Lauraceae) in New Caledonia and neighbouring islands
2025
Munzinger, Jérôme | Gemmill, Chrissen | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM) | University of Waikato [Hamilton]
International audience
显示更多 [+] 显示较少 [-]英语. In order to gain a better understanding of the delimitation and history of species of Lauraceae present in New Caledonia, several of which are thought to be new, a phylogenetic analysis based on the ITS nuclear sequences of Cryptocaryeae was undertaken with 147 new samples from the region. This study reveals monophyly for most of the currently recognised New Caledonian species in Cryptocarya and Endiandra, and for seven recently published new species (C. adpressa, C. barrabeae, C. chrysea, C. conduplicata, C. ovoidea, E. humboldtiana, and E. trichogyna). As well, several presumed new species in these two genera, based on morphological features, were found to be monophyletic and will require formal description. The monophyly of Cryptocarya is again confirmed, and that of Endiandra appears probable. In Beilschmiedia, four genetically distinct New Caledonian clades were observed, but they do not correspond to the two described species (B. oreophila and B. neocaledonica) nor to one easily recognised morphospecies. The relationships among the genera Beilschmiedia, Endiandra, Syndiclis, Sinopora, Potameia and Yasunia remain unresolved. Beilschmiedia from New Caledonia represents a distinct clade. Finally, this study reveals a dynamic history with multiple colonisation events onto the archipelago.
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