Peters RSCenter of Taxonomy and Evolutionary Research, Arthropoda Department, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany. Electronic address: r.peters@leibniz-zfmk.de.
Krogmann LEntomologie, Staatliches Museum für Naturkunde Stuttgart, 70191 Stuttgart, Germany.
Mayer CCenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany.
Donath ACenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany.
Gunkel SSteinmann Institut für Geologie, Mineralogie und Paläontologie, 53115 Bonn, Germany.
Meusemann KCenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany; Department of Evolutionary Biology and Ecology, Institute for Biology I (Zoology), University of Freiburg, 79104 Freiburg (Brsg.), Germany; Australian National Insect Collection, CSIRO National Research Collections Australia (NRCA), Acton, ACT 2601, Australia.
Kozlov AScientific Computing Group, Heidelberg Institute for Theoretical Studies, 69118 Heidelberg, Germany.
Podsiadlowski LInstitute of Evolutionary Biology and Ecology, University of Bonn, 53121 Bonn, Germany.
Petersen MCenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany.
Lanfear REcology, Evolution and Genetics, Research School of Biology, Australian National University, Canberra, ACT 2601, Australia; School of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia.
Diez PACentro de Investigaciones y Transferencia de Catamarca, CITCA-CONICET/UNCA, 4700 Catamarca, Argentina.
Heraty JDepartment of Entomology, University of California, Riverside, Riverside, CA 92521, USA.
Kjer KMDepartment of Biological Sciences, Rutgers University, Newark, NJ 07102, USA.
Klopfstein SNaturhistorisches Museum der Burgergemeinde Bern, 3005 Bern, Switzerland.
Meier RDepartment of Biological Sciences and Lee Kong Chian Natural History Museum, National University of Singapore, Singapore 117543, Singapore.
Polidori CInstituto de Ciencias Ambientales (ICAM), Universidad de Castilla-La Mancha, 45071 Toledo, Spain.
Schmitt TDepartment of Animal Ecology and Tropical Biology, University of Würzburg, 97074 Würzburg, Germany.
Liu SChina National GeneBank-Shenzhen, BGI-Shenzhen, Shenzhen, Guangdong Province, 518083, People's Republic of China; BGI-Shenzhen, Shenzhen, Guangdong Province, 518083, People's Republic of China; Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark.
Zhou XBeijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100193, People's Republic of China; Department of Entomology, China Agricultural University, Beijing 100193, People's Republic of China.
Wappler TSteinmann Institut für Geologie, Mineralogie und Paläontologie, 53115 Bonn, Germany.
Rust JSteinmann Institut für Geologie, Mineralogie und Paläontologie, 53115 Bonn, Germany.
Misof BCenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany.
Niehuis OCenter for Molecular Biodiversity Research, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany; Department of Evolutionary Biology and Ecology, Institute for Biology I (Zoology), University of Freiburg, 79104 Freiburg (Brsg.), Germany; School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA. Electronic address: oliver.niehuis@biologie.uni-freiburg.de.
English
Hymenoptera (sawflies, wasps, ants, and bees) are one of four mega-diverse insect orders, comprising more than 153,000 described and possibly up to one million undescribed extant species [1, 2]. As parasitoids, predators, and pollinators, Hymenoptera play a fundamental role in virtually all terrestrial ecosystems and are of substantial economic importance [1, 3]. To understand the diversification and key evolutionary transitions of Hymenoptera, most notably from phytophagy to parasitoidism and predation (and vice versa) and from solitary to eusocial life, we inferred the phylogeny and divergence times of all major lineages of Hymenoptera by analyzing 3,256 protein-coding genes in 173 insect species. Our analyses suggest that extant Hymenoptera started to diversify around 281 million years ago (mya). The primarily ectophytophagous sawflies are found to be monophyletic. The species-rich lineages of parasitoid wasps constitute a monophyletic group as well. The little-known, species-poor Trigonaloidea are identified as the sister group of the stinging wasps (Aculeata). Finally, we located the evolutionary root of bees within the apoid wasp family "Crabronidae." Our results reveal that the extant sawfly diversity is largely the result of a previously unrecognized major radiation of phytophagous Hymenoptera that did not lead to wood-dwelling and parasitoidism. They also confirm that all primarily parasitoid wasps are descendants of a single endophytic parasitoid ancestor that lived around 247 mya. Our findings provide the basis for a natural classification of Hymenoptera and allow for future comparative analyses of Hymenoptera, including their genomes, morphology, venoms, and parasitoid and eusocial life styles.