Xenacoelomorpha is the sister group to Nephrozoa

@article{Cannon2016XenacoelomorphaIT,
  title={Xenacoelomorpha is the sister group to Nephrozoa},
  author={J. Cannon and Bruno C. Vellutini and Julian P. S. Smith and F. Ronquist and U. Jondelius and A. Hejnol},
  journal={Nature},
  year={2016},
  volume={530},
  pages={89-93}
}
The position of Xenacoelomorpha in the tree of life remains a major unresolved question in the study of deep animal relationships. [...] Key Result Here we show robust phylogenomic support for Xenacoelomorpha as the sister taxon of Nephrozoa. Our phylogenetic analyses, based on 11 novel xenacoelomorph transcriptomes and using different models of evolution under maximum likelihood and Bayesian inference analyses, strongly corroborate this result.Expand
Molecular approaches for studying the evolution of the Xenacoelomorpha
TLDR
Gen visualisation protocols are developed and applied to investigate the expression patterns of genes commonly associated with ultrafiltration in Xenoturbella and the acoel Symsagittifera roscoffensis to shed light on the origin and homology of filtratory structures, which remain unclear. Expand
Xenacoelomorpha, a Key Group to Understand Bilaterian Evolution: Morphological and Molecular Perspectives
TLDR
What has been learned over the last decades on the morphology, genomics and phylogenetic relationships of the Xenacoelomorpha is revisited. Expand
Computational analysis of gene content in Xenacoelomorpha
TLDR
The phylogenetic analysis tentatively supports the placement of Xenacoelomorpha as a sister group of Ambulacraria, and the analysis of ancestral gene family content is suggestive for the phylogenetic position of the XenacoELOMorpha. Expand
Xenacoelomorph-Specific Hox Peptides: Insights into the Phylogeny of Acoels, Nemertodermatids, and Xenoturbellids
TLDR
Results from the decoded genome of the acoel Praesagittifera naikaiensis and reported xenacoelomorph Hox genes revealed that acoels share a peptide NLK(S/T)MSQ(V/I)D, which starts immediately after the homeodomain sequence of the central Hox4/5/6. Expand
Hidden diversity of Acoelomorpha revealed through metabarcoding
TLDR
Analysis of 18S rDNA metabarcoding data from three marine projects covering benthic and pelagic habitats worldwide shows that acoels have a greater richness in planktonic environments than previously described, and identifies a putative novel clade in the deep benthos that branches as sister group to the rest of Acoela, thus representing the earliest-branching acoel clade. Expand
Phylogeny: A home for Xenoturbella
  • H. Gee
  • Biology, Medicine
  • Nature
  • 2016
TLDR
Four new deep-sea species of Xenoturbella are added from the eastern Pacific Ocean to the two already known from the Atlantic, and phylogenetic analysis aligns them at the base of the Protostomia or even as basal bilaterians. Expand
Development of Xenoturbellida.
  • H. Nakano
  • Biology, Medicine
  • Results and problems in cell differentiation
  • 2019
TLDR
Comparison with the other marine invertebrate larvae suggests that the morphologically simple swimming larvae described in Xenoturbella represent an ancestral larval type of all metazoans and bilaterians. Expand
Placozoans are eumetazoans related to Cnidaria
TLDR
It is necessary to reconsider the homology of eumetazoan traits not only between ctenophores and bilaterians, but also between cnidarians and bizards, as well as between placozoans and poriferans. Expand
Deep gastropod relationships resolved
TLDR
The time of differentiation of the embryonic 4d cell (mesentoblast, responsible for mesoderm formation), differs between the two major clades, highlighting the degree of conservation and significance of development in the evolution of gastropods, as it is also known for spiralian animals more broadly. Expand
Deep gastropod relationships resolved
TLDR
The time of differentiation of the embryonic 4d cell (mesentoblast, responsible for mesoderm formation), differs between the two major clades, highlighting the degree of conservation and significance of development in the evolution of gastropods, as it is also known for spiralian animals more broadly. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 47 REFERENCES
Acoelomorph flatworms are deuterostomes related to Xenoturbella
TLDR
This phylogeny makes sense of the shared characteristics of Xenoturbellida and Acoelomorpha, and implies the loss of various deuterostome characters in the Xenobiology including coelomic cavities, through gut and gill slits. Expand
Phylogenomic Resolution of the Hemichordate and Echinoderm Clade
TLDR
The resolved ambulacrarian phylogeny will help clarify the early evolution of chordate characteristics and has implications for the understanding of major fossil groups, including graptolites and somasteroideans. Expand
The Nemertodermatida are basal bilaterians and not members of the Platyhelminthes
TLDR
The results imply that the last common ancestor of bilaterian metazoans was a small, benthic, direct developer without segments, coelomic cavities, nephrida or a true brain. Expand
Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida
TLDR
To study the relationships among all deuterostome groups, an alignment of more than 35,000 homologous amino acids is assembled, including new data from a hemichordate, starfish and Xenoturbella and it is concluded that chordates are monophyletic. Expand
The mitochondrial genome structure of Xenoturbella bocki (phylum Xenoturbellida) is ancestral within the deuterostomes
TLDR
The mitochondrial genome of Xenoturbella bocki has a very conserved gene arrangement in the deuterostome group, strikingly similar to that of the hemichordates and the chordates, and thus to the ancestral deuterstome gene order. Expand
Assessing the root of bilaterian animals with scalable phylogenomic methods
  • A. Hejnol, M. Obst, +14 authors C. Dunn
  • Biology, Medicine
  • Proceedings of the Royal Society B: Biological Sciences
  • 2009
TLDR
New sequence data and methods strongly uphold previous suggestions that Acoelomorpha is sister clade to all other bilaterian animals, find diminishing evidence for the placement of the enigmatic Xenoturbella within Deuterostomia, and place Cycliophora with Entoprocta and EctoproCTa. Expand
The phylogenetic position of Acoela as revealed by the complete mitochondrial genome of Symsagittifera roscoffensis
TLDR
The phylogenetic analysis supports the view that acoels and nemertodermatids are the earliest divergent extant lineage of Bilateria and remain a valid source for seeking primitive characters present in the last common ancestor of Bilatersia. Expand
On the phylogenetic position of Myzostomida: can 77 genes get it wrong?
TLDR
It is concluded that reliance of a set of markers belonging to a single class of macromolecular complexes might bias the analysis, and that concatenation of all available data might introduce conflicting signal into phylogenetic analyses. Expand
Error, signal, and the placement of Ctenophora sister to all other animals
TLDR
Investigating possible causes of systematic error by expanding taxon sampling with eight novel transcriptomes, strictly enforcing orthology inference criteria, and progressively examining potential causes of systemic error while using both maximum-likelihood with robust data partitioning and Bayesian inference with a site-heterogeneous model finds a single, statistically robust placement of ctenophores as the authors' most distant animal relatives. Expand
Spiralian Phylogeny Informs the Evolution of Microscopic Lineages
TLDR
The emerging concept of a microscopic, acoelomate, direct-developing ancestor of Spiralia is reviewed and 402 orthologs mined from genome and transcriptome assemblies of 90 taxa are assessed. Expand
...
1
2
3
4
5
...