A DNA and morphology based phylogenetic framework of the ant genus Lasius with hypotheses for the evolution of social parasitism and fungiculture

Munetoshi Maruyama, Florian M. Steiner, Christian Stauffer, Toshiharu Akino, Ross H. Crozier, Birgit C. Schlick-Steiner

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Background. Ants of the genus Lasius are ecologically important and an important system for evolutionary research. Progress in evolutionary research has been hindered by the lack of a well-founded phylogeny of the subgenera, with three previous attempts disagreeing. Here we employed two mitochondrial genes (cytochrome c oxidase subunit I, 16S ribosomal RNA), comprising 1,265 bp, together with 64 morphological characters, to recover the phylogeny of Lasius by Bayesian and Maximum Parsimony inference after exploration of potential causes of phylogenetic distortion. We use the resulting framework to infer evolutionary pathways for social parasitism and fungiculture. Results. We recovered two well supported major lineages. One includes Acanthomyops, Austrolasius, Chthonolasius, and Lasius pallitarsis, which we confirm to represent a seventh subgenus, the other clade contains Dendrolasius, and Lasius sensu stricto. The subgenus Cautolasius, displaying neither social parasitism nor fungiculture, probably belongs to the second clade, but its phylogenetic position is not resolved at the cutoff values of node support we apply. Possible causes for previous problems with reconstructing the Lasius phylogeny include use of other reconstruction techniques, possibly more prone to instabilities in some instances, and the inclusion of phylogenetically distorting characters. Conclusion. By establishing an updated phylogenetic framework, our study provides the basis for a later formal taxonomic revision of subgenera and for studying the evolution of various ecologically and sociobiologically relevant traits of Lasius, although there is need for future studies to include nuclear genes and additional samples from the Nearctic. Both social parasitism and fungiculture evolved twice in Lasius, once in each major lineage, which opens up new opportunities for comparative analyses. The repeated evolution of social parasitism has been established for other groups of ants, though not for temporary social parasitism as found in Lasius. For fungiculture, the independent emergence twice in a monophyletic group marks a novel scenario in ants. We present alternative hypotheses for the evolution of both traits, with one of each involving loss of the trait. Though less likely for both traits than later evolution without reversal, we consider reversal as sufficiently plausible to merit independent testing.

Original languageEnglish
Article number237
JournalBMC Evolutionary Biology
Volume8
Issue number1
DOIs
Publication statusPublished - Sep 25 2008

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social parasitism
Lasius
ant
Formicidae
phylogenetics
DNA
phylogeny
Acanthomyops
gene
cytochrome
RNA
taxonomic revisions
cytochrome-c oxidase
eclosion
genes
ribosomal RNA

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

Cite this

A DNA and morphology based phylogenetic framework of the ant genus Lasius with hypotheses for the evolution of social parasitism and fungiculture. / Maruyama, Munetoshi; Steiner, Florian M.; Stauffer, Christian; Akino, Toshiharu; Crozier, Ross H.; Schlick-Steiner, Birgit C.

In: BMC Evolutionary Biology, Vol. 8, No. 1, 237, 25.09.2008.

Research output: Contribution to journalArticle

Maruyama, Munetoshi ; Steiner, Florian M. ; Stauffer, Christian ; Akino, Toshiharu ; Crozier, Ross H. ; Schlick-Steiner, Birgit C. / A DNA and morphology based phylogenetic framework of the ant genus Lasius with hypotheses for the evolution of social parasitism and fungiculture. In: BMC Evolutionary Biology. 2008 ; Vol. 8, No. 1.
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