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Evolution of Hypolimnas butterflies (Nymphalidae) : Out-of-Africa origin and Wolbachia-mediated introgression

Author:
  • Ranjit Kumar Sahoo
  • David J. Lohman
  • Niklas Wahlberg
  • Chris J. Müller
  • Oskar Brattström
  • Steve C. Collins
  • Djunijanti Peggie
  • Kwaku Aduse-Poku
  • Ullasa Kodandaramaiah
Publishing year: 2018-06-01
Language: English
Pages: 50-58
Publication/Series: Molecular Phylogenetics and Evolution
Volume: 123
Document type: Journal article
Publisher: Elsevier

Abstract english

Hypolimnas butterflies (Nymphalidae), commonly known as eggflies, are a popular model system for studying a wide range of ecological questions including mimicry, polymorphism, wing pattern evolution, and Wolbachia-host interactions. The lack of a time-calibrated phylogeny for this group has precluded understanding its evolutionary history. We reconstruct a species-level phylogeny using a nine gene dataset and estimate species divergence times. Based on the resulting tree, we investigate the taxon's historical biogeography, examine the evolution of host plant preferences, and test the hypothesis that the endosymbiotic bacterium Wolbachia mediates gene transfer between species. Our analyses indicate that the species are grouped within three strongly supported, deeply divergent clades. However, relationships among these three clades are uncertain. In addition, many Hypolimnas species are not monophyletic or monophyletic with weak support, suggesting widespread incomplete lineage sorting and/or introgression. Biogeographic analysis strongly indicates that the genus diverged from its ancestor in Africa and subsequently dispersed to Asia; the strength of this result is not affected by topological uncertainties. While the larvae of African species feed almost exclusively on Urticaceae, larvae of species found further east often feed on several additional families. Interestingly, we found an identical mitochondrial haplotype in two Hypolimnas species, H. bolina and H. alimena, and a strong association between this mitotype and the Wolbachia strain wBol1a. Future investigations should explore the plausibility of Wolbachia-mediated introgression between species.

Keywords

  • Evolutionary Biology
  • Arabia-Asia land bridge
  • Biogeography
  • Horizontal gene transfer
  • Host plant
  • Mid-Miocene climatic optimum
  • Oscillation hypothesis

Other

Published
  • ISSN: 1055-7903
Professor Niklas Wahlberg at the unit of Biodiversity, Lund University.
E-mail: niklas [dot] wahlberg [at] biol [dot] lu [dot] se

Professor

Biodiversity

+46 46 222 31 02

E-E335

Sölvegatan 37, Lund

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Museum director

Biological Museum

+46 46 222 31 02

E-E335

Sölvegatan 37, Lund

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