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From the Mediterranean to the Pacific: re-circumscription towards Notelaea s.l. and historical biogeography of a generic complex in Oleinae (Oleaceae)

Authors: Julia Dupin; Cynthia Hong-Wa; Yohan Pillon; Guillaume Besnard;

From the Mediterranean to the Pacific: re-circumscription towards Notelaea s.l. and historical biogeography of a generic complex in Oleinae (Oleaceae)

Abstract

Tackling the complicated infrafamilial classification of the economically important Oleaceae requires a piecemeal approach that addresses generic circumscriptions. Here, focusing on the distinct clade formed by the generic complex Nestegis, Notelaea, Osmanthus, Phillyrea and Picconia in subtribe Oleinae, we aim to elucidate their boundaries and relationships and to evaluate their biogeographic history in light of their peculiar disjunct distribution in the Macaronesian, Mediterranean and Pacific regions. Based on phylogenomic data from plastid and nuclear DNA of an extensive sampling, the results show six subclades in this generic complex, which are also geographical segregates found in Australia (Notelaea), Hawaiian Islands (Nestegis sandwicensis), Macaronesia (Phillyrea and Picconia), Mediterranean region (Phillyrea), New Caledonia (Osmanthus section Notosmanthus), and New Zealand (Nestegis s.s.). Accounting for broad morphological overlaps in this clade, we recognize three genera (Phillyrea, Picconia and Notelaea s.l.), subsuming all Pacific taxa under Notelaea. Molecular dating and biogeographic analyses indicate that this clade originated in Eurasia during the Early Miocene (mean 23.2 Mya, 95% HPD: 23.8 – 14.7). Finally, dispersal (rather than continental vicariance) is probably the main explanation for the global, disjunct distribution of this group, with island-hopping and local extinction as the hallmarks of its evolutionary history

International audience

Country
France
Keywords

Canary Islands, Phillyrea, Plant Science, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, museomics, Picconia, Azores, Canary Islands, Madeira, Morphology, Museomics, Nestegis, Osmanthus, Phillyrea, Picconia, Zealandia, Madeira, Osmanthus, morphology, Zealandia, Nestegis, Azores, Ecology, Evolution, Behavior and Systematics

94 references, page 1 of 10

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
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