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Molecular dating and biogeography of fig-pollinating wasps
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Biology.
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2009 (English)In: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, Vol. 52, no 3, 715-726 p.Article in journal (Refereed) Published
Abstract [en]

Figs and fig-pollinating wasps are obligate mutualists that have coevolved for over 60 million years. But when and where did pollinating fig wasps (Agaonidae) originate? Some studies suggest that agaonids arose in the Late Cretaceous and the current distribution of fig-wasp faunas can be explained by the break-up of the Gondwanan landmass. However, recent molecular-dating studies suggest divergence time estimates that are inconsistent with the Gondwanan vicariance hypothesis and imply that long distance oceanic dispersal could have been an important process for explaining the current distribution of both figs and fig wasps. Here, we use a combination of phylogenetic and biogeographical data to infer the age, the major period of diversification, and the geographic origin of pollinating fig wasps. Age estimates ranged widely depending on the molecular-dating method used and even when using the same method but with slightly different constraints, making it difficult to assess with certainty a Gondwanan origin of agaonids. The reconstruction of ancestral areas suggests that the most recent common ancestor of all extant fig-pollinating wasps was most likely Asian, although a southern Gondwana origin cannot be rejected. Our analysis also suggests that dispersal has played a more important role in the development of the fig-wasp biota than previously assumed. (C) 2009 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
2009. Vol. 52, no 3, 715-726 p.
Keyword [en]
Agaonidae, Bayesian molecular clock, Divergence times, Dominican amber, Ficus, Plant-insect interactions
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-128339DOI: 10.1016/j.ympev.2009.05.028ISI: 000268265800013OAI: oai:DiVA.org:uu-128339DiVA: diva2:331299
Available from: 2010-07-22 Created: 2010-07-20 Last updated: 2010-07-22Bibliographically approved

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