AnnEvol - Evolution and phylogeny of Annelida based on phylogenomic data (i.e. EST libraries)
Zusammenfassung der Projektergebnisse
Annelida is a morphologically and ecologically diverse taxon within the Lophotrochozoa. Its members occupy a wide range of environments and show a variety of different life styles. The phylogeny of this group comprising more than 17,000 species remained controversial for a long time. By using next generation sequencing and phylogenomic analyses of huge data matrices we were able to reach a well-supported and resolved annelid backbone tree. In total, we constructed transcriptome or genome sequencing libraries for 39 different species representing 29 annelid families. We conducted phylogenomic analyses using costumized analyses pipelines including up to 689 genes and ~180,000 amino acid positions of up to 80 annelid taxa. Our analyses conclusively show that most annelid diversity is comprised in two reciprocal monophyletic groups, Sedentaria and Errantia, named after the predominant life style of their members. Errantia include Phyllodocida, Eunicida, and Protodriliformia, which is taxon of interstitial polychaetes. Sedentaria comprise most of the polychaete families formerly classified as Canalipalpata or Scolecida, as well as the Clitellata. Several taxa branch as a basal grade outside of this major radiation: Oweniidae, Magelonidae, Chaetopteridae, Sipuncula, and Amphinomida. Oweniidae and Magelonidae form a monophyletic group which constitutes the sister taxon of the remaining annelids. The early splits of annelid phylogeny dates back to the Cambrian and must be older than 520 million years. The new annelid phylogeny shows the variability of annelid body plans, and many instances of simplifications of body plan as adaptations to new life styles can be found. Therefore annelids will be an appropriate model to understand major transitions of the evolution of Bilateria in general.
Projektbezogene Publikationen (Auswahl)
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(2013). The impact of paralogy on phylogenomic studies - a case study on annelid relationships. PLOS ONE, 8, e62892
Struck, T. H.
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(2014) Illuminating the base of the annelid tree using transcriptomics. Molecular Biology and Evolution 31: 1391-1401
Weigert, A., Helm, C., Meyer, M., Nickel, B., Arendt, D., Hausdorf, B., Santos, S. R., Halanych, K. M., Purschke, G., Bleidorn, C., Struck, T. H.
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(2014) Platyzoan paraphyly based on phylogenomic data supports a noncoelomate ancestry of Spiralia. Molecular Biology and Evolution 31: 1833-1849
Struck, T. H., Wey-Fabrizius, A., Golombeck, A., Hering, L., Weigert, A., Bleidorn, C., Klebow, S., Iakovenko, N., Hausdorf, B., Petersen, M., Kück, P., Herlyn, H., Hankeln, T.
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(2014). TreSpEx – Detection of misleading signal in phylogenetic reconstructions based on tree information. Evolutionary Bioinformatics 10: 51-67
Struck, T. H.
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(2014): Systematics, Evolution and Phylogeny of Annelida - a morphological Perspective. Memoirs of Museum Victoria 71: 247-269
Purschke G., Bleidorn C., Struck T.H.
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(2015) Description of a new syllid species as a model for evolutionary research of reproduction and regeneration in annelids. Organisms Diversity & Evolution 15: 1-21
Aguado, M.T., Helm, C., Weidhase, M., Bleidorn, C.
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(2015) The evolution of annelids reveals two adaptive routes to the interstitial realm. Current Biology 25: 1993-1999
Struck, T.H., Golombek, A., Weigert, A., Franke, F.A., Westheide, W., Purschke, G., Bleidorn, C., Halanych, K.M.
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(2015) The making of a branching annelid: an analysis of complete mitochondrial genome and ribosomal data of Ramisyllis multicaudata. Scientific Reports 5: 12072
Aguado, M.T., Glasby, C.J., Schroeder, P.C., Weigert, A., Bleidorn, C.
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Evolution of mitochondrial gene order in Annelida. Molecular Phylogenetics and Evolution, Volume 94, Part A, January 2016, Pages 196-206
Weigert, A., Golombek, A, Gerth, M., Schwarz, F., Struck, T.H., Bleidorn, C.
