ReviewPhilosophical transactions of the Royal Society of London. Series B, Biological sciences2008
Back in time: a new systematic proposal for the Bilateria.
Review in Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Acoel Single-Cell Transcriptomics: Cell Type Analysis of a Deep Branching Bilaterian.Molecular biology and evolution · 2021Article
- The genetic factors of bilaterian evolution.eLife · 2020Article
- The neuroanatomy ofFrontiers in zoology · 2019Article
- The molecular symplesiomorphies shared by the stem groups of metazoan evolution: can sites as few as 1% have a significant impact on recognizing the phylogenetic position of myzostomida?Journal of molecular evolution · 2014Article
- The complete mitochondrial genome of Flustra foliacea (Ectoprocta, Cheilostomata) - compositional bias affects phylogenetic analyses of lophotrochozoan relationships.BMC genomics · 2011Article
- The origin of patterning systems in bilateria-insights from the Hox and ParaHox genes in Acoelomorpha.Genomics, proteomics & bioinformatics · 2011Review
- Article
- Fast evolving 18S rRNA sequences from Solenogastres (Mollusca) resist standard PCR amplification and give new insights into mollusk substitution rate heterogeneity.BMC evolutionary biology · 2010Article
- Early origin of the bilaterian developmental toolkit.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2009Article
- Unexpected functional redundancy between Twist and Slug (Snail2) and their feedback regulation of NF-kappaB via Nodal and Cerberus.Developmental biology · 2009Article
- To be or not to be a flatworm: the acoel controversy.PloS one · 2009Article
- The evolution of the animals: introduction to a Linnean tercentenary celebration.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2008Article
Corrections and comments
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Authors and funding
4 authors.
Funding
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Abstract
Conventional wisdom suggests that bilateral organisms arose from ancestors that were radially, rather than bilaterally, symmetrical and, therefore, had a single body axis and no mesoderm. The two main hypotheses on how this transformation took place consider either a simple organism akin to the planula larva of extant cnidarians or the acoel Platyhelminthes (planuloid-acoeloid theory), or a rather complex organism bearing several or most features of advanced coelomate bilaterians (archicoelomate theory). We report phylogenetic analyses of bilaterian metazoans using quantitative (ribosomal, nuclear and expressed sequence tag sequences) and qualitative (HOX cluster genes and microRNA sets) markers. The phylogenetic trees obtained corroborate the position of acoel and nemertodermatid flatworms as the earliest branching extant members of the Bilateria. Moreover, some acoelomate and pseudocoelomate clades appear as early branching lophotrochozoans and deuterostomes. These results strengthen the view that stem bilaterians were small, acoelomate/pseudocoelomate, benthic organisms derived from planuloid-like organisms. Because morphological and recent gene expression data suggest that cnidarians are actually bilateral, the origin of the last common bilaterian ancestor has to be put back in time earlier than the cnidarian-bilaterian split in the form of a planuloid animal. A new systematic scheme for the Bilateria that includes the Cnidaria is suggested and its main implications discussed.
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