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Abstract Detail



Biogeography

Buerki, Sven [1], Callmander, Martin W. [2].

Spatio-temporal history of the screw-pine genus Benstonea (Pandanaceae).

Recent phylogenetic and morphological analyses allowed the description a new genus of screw-pines (Pandanaceae), Benstonea (ca. 60 species). This genus is distinctly characterized by stigmatic grooves on the adaxial face of the style and a reduced staminate flower with only 1(-3) stamens. The genus is distributed from India to Fiji with the centre of species diversity in South-East Asia (>90% endemism). Although there is strong morphological and molecular support for the recognition of this genus, the previous study did not resolve its position within the family. In this study, we propose to overcome this issue by inferring a new familial phylogenetic hypothesis based on a broader taxon sampling and additional DNA regions. A species-level phylogeny of Benstonea was produced – including >80% of the species diversity. This framework is used to infer the spatio-temporal history of Benstonea through the application of a constrained geographical model. This inference will be used to assess the effect of palaeogeographical events (e.g. the impact of the creation of SE Asia) on the diversification of the genus. Furthermore, the effect of climate change on the evolution and modern distribution of the genus is also discussed.


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1 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, TW9 3DS, UK
2 - Missouri Botanical Garden, Saint Louis, 63166-0299, USA

Keywords:
Biogeography
fossil plant
SE Asia.

Presentation Type: Oral Paper:Papers for Topics
Session: 3
Location: Salmon/Boise Centre
Date: Monday, July 28th, 2014
Time: 10:30 AM
Number: 3009
Abstract ID:114
Candidate for Awards:None


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