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Ancient divergence and biogeography of Raukaua (Araliaceae) and close relatives in the southern hemisphere
Mitchell, Anthony1; Li, Rong2; Brown, Joseph W.3; Schoenberger, Ines4; Wen, Jun5
2012-12-14
发表期刊AUSTRALIAN SYSTEMATIC BOTANY
ISSN1030-1887
卷号25期号:6页码:432-446
摘要Molecular genetic analyses were used to reconstruct phylogenetic relationships and estimate divergence times for Raukaua species and their close relatives. A monophyletic group identified as the 'greater Raukaua clade' was circumscribed, with eight representative species; its basal divergence was estimated at c. 70 Mya, possibly after Zealandia had separated from Gondwana. Raukaua is paraphyletic because of the placement of Motherwellia, Cephalaralia, Cheirodendron and Schefflera s.s. The phylogeny supports a more narrowly circumscribed Raukaua that includes the New Zealand but not the South American or Tasmanian representatives. Ancestors of the monophyletic South American and Tasmanian Raukaua and the mainland Australian Motherwellia and Cephalaralia diverged at c. 66 Mya and their current disjunction may be vicariant, with overland dispersal between Australia and South America, possibly via Antarctica. Vicariance is also a likely mechanism for divergence at c. 57 Mya of the monophyletic Motherwellia, Cephalaralia and Tasmanian Raukaua. The common ancestor of New Zealand Raukaua, Cheirodendron and Schefflera s.s. is inferred to have existed c. 62 Mya in New Zealand, before the marine incursions during the Oligocene, implying that New Zealand Raukaua and Schefflera s.s. survived the inundation period or speciated outside New Zealand and subsequently colonised. Ancestors of Cheirodendron split from New Zealand Raukaua c. 43 Mya and dispersed over vast expanses of the south-western Pacific to Hawaii.
关键词Long-distance Dispersal Dna-sequence Data New-zealand Phylogenetic Analysis Goodbye Gondwana Terrestrial Fauna Flowering Plants Mixed Models Evolution Genus
资助信息John D. and Catherine T. MacArthur Foundation; Natural Science Foundation of China [30828001]; Laboratory of Analytical Biology at the National Museum of Natural History of the Smithsonian Institution
收录类别SCI
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/16002
专题中国西南野生生物种质资源库
作者单位1.Univ Otago, Christchurch 8140, New Zealand
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
3.Univ Idaho, Dept Biol Sci, Moscow, ID 83843 USA
4.Landcare Res, Allan Herbarium CHR, Lincoln 7640, New Zealand
5.Smithsonian Inst, Dept Bot MRC, Washington, DC 20013 USA
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Anthony Mitchell, Rong Li, Joseph W. Brown, Ines Schoenberger, Jun Wen. 2012. Ancient divergence and biogeography of Raukaua (Araliaceae) and close relatives in the southern hemisphere. Australian Systematic Botany 25: 432-446.
APA Mitchell, Anthony,Li, Rong,Brown, Joseph W.,Schoenberger, Ines,&Wen, Jun.(2012).Ancient divergence and biogeography of Raukaua (Araliaceae) and close relatives in the southern hemisphere.AUSTRALIAN SYSTEMATIC BOTANY,25(6),432-446.
MLA Mitchell, Anthony,et al."Ancient divergence and biogeography of Raukaua (Araliaceae) and close relatives in the southern hemisphere".AUSTRALIAN SYSTEMATIC BOTANY 25.6(2012):432-446.
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