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Article: Generic delimitation and historical biogeography in the early-divergent 'ambavioid' lineage of Annonaceae: Cananga, Cyathocalyx and Drepananthus

TitleGeneric delimitation and historical biogeography in the early-divergent 'ambavioid' lineage of Annonaceae: Cananga, Cyathocalyx and Drepananthus
Authors
KeywordsAnnonaceae
Biogeography
Cananga
Cyathocalyx
DIVA
Drepananthus
Molecular dating
Phylogeny
Issue Date2010
PublisherInternational Association for Plant Taxonomy. The Journal's web site is located at http://www.iapt-taxon.org/
Citation
Taxon, 2010, v. 59 n. 6, p. 1721-1734 How to Cite?
AbstractGeneric delimitation of Cyathocalyx and Drepananthus has been controversial, with some authors recognizing them as distinct genera, and others recognizing a more broadly defined Cyathocalyx, inclusive of Drepananthus. Some doubt also exists regarding the relationships between these taxa and Cananga. Molecular phylogenetic analyses are presented based on combined psbA-trnH spacer, trnL-F, matK and rbcL sequences. Results indicate that Cananga, Cyathocalyx s.str. and Drepananthus form three generally well-supported clades, although with inadequate resolution of relationships among the three clades. Morphological variation is re-evaluated, and the narrower delimitation of Cyathocalyx proposed, necessitating 21 new nomenclatural combinations following the recognition of Drepananthus as a distinct genus. Divergence times are estimated using an uncorrelated lognormal distributed (UCLD) relaxed molecular clock. Historical biogeographical analysis suggests that the ambavioid lineage originated in Africa, with subsequent dispersal into Asia. Alternative hypotheses for this dispersal, involving rafting on the Indian tectonic plate versus migration via the extensive boreotropical forests associated with the Eocene thermal maximum, are evaluated, and the latter route identified as the most consistent with the divergence age estimates and the geological and palaeoclimatic data.
Persistent Identifierhttp://hdl.handle.net/10722/142965
ISSN
2015 Impact Factor: 2.907
2015 SCImago Journal Rankings: 1.007
References

 

DC FieldValueLanguage
dc.contributor.authorSurveswaran, Sen_HK
dc.contributor.authorWang, RJen_HK
dc.contributor.authorSu, YCFen_HK
dc.contributor.authorSaunders, RMKen_HK
dc.date.accessioned2011-10-28T03:00:19Z-
dc.date.available2011-10-28T03:00:19Z-
dc.date.issued2010en_HK
dc.identifier.citationTaxon, 2010, v. 59 n. 6, p. 1721-1734en_HK
dc.identifier.issn0040-0262en_HK
dc.identifier.urihttp://hdl.handle.net/10722/142965-
dc.description.abstractGeneric delimitation of Cyathocalyx and Drepananthus has been controversial, with some authors recognizing them as distinct genera, and others recognizing a more broadly defined Cyathocalyx, inclusive of Drepananthus. Some doubt also exists regarding the relationships between these taxa and Cananga. Molecular phylogenetic analyses are presented based on combined psbA-trnH spacer, trnL-F, matK and rbcL sequences. Results indicate that Cananga, Cyathocalyx s.str. and Drepananthus form three generally well-supported clades, although with inadequate resolution of relationships among the three clades. Morphological variation is re-evaluated, and the narrower delimitation of Cyathocalyx proposed, necessitating 21 new nomenclatural combinations following the recognition of Drepananthus as a distinct genus. Divergence times are estimated using an uncorrelated lognormal distributed (UCLD) relaxed molecular clock. Historical biogeographical analysis suggests that the ambavioid lineage originated in Africa, with subsequent dispersal into Asia. Alternative hypotheses for this dispersal, involving rafting on the Indian tectonic plate versus migration via the extensive boreotropical forests associated with the Eocene thermal maximum, are evaluated, and the latter route identified as the most consistent with the divergence age estimates and the geological and palaeoclimatic data.en_HK
dc.languageengen_US
dc.publisherInternational Association for Plant Taxonomy. The Journal's web site is located at http://www.iapt-taxon.org/en_HK
dc.relation.ispartofTaxonen_HK
dc.subjectAnnonaceaeen_HK
dc.subjectBiogeographyen_HK
dc.subjectCanangaen_HK
dc.subjectCyathocalyxen_HK
dc.subjectDIVAen_HK
dc.subjectDrepananthusen_HK
dc.subjectMolecular datingen_HK
dc.subjectPhylogenyen_HK
dc.titleGeneric delimitation and historical biogeography in the early-divergent 'ambavioid' lineage of Annonaceae: Cananga, Cyathocalyx and Drepananthusen_HK
dc.typeArticleen_HK
dc.identifier.emailSurveswaran, S: sid1@hkucc.hku.hken_HK
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_HK
dc.identifier.authoritySurveswaran, S=rp00783en_HK
dc.identifier.authoritySaunders, RMK=rp00774en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-78751473734en_HK
dc.identifier.hkuros184099en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78751473734&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume59en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1721en_HK
dc.identifier.epage1734en_HK
dc.publisher.placeAustriaen_HK
dc.identifier.scopusauthoridSurveswaran, S=15766021500en_HK
dc.identifier.scopusauthoridWang, RJ=9737305300en_HK
dc.identifier.scopusauthoridSu, YCF=7404456219en_HK
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_HK

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