Kapli, P;
Telford, MJ;
(2020)
Topology-dependent asymmetry in systematic errors affects phylogenetic placement of Ctenophora and Xenacoelomorpha.
Science Advances
, 6
(50)
, Article eabc5162. 10.1126/sciadv.abc5162.
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Abstract
The evolutionary relationships of two animal phyla, Ctenophora and Xenacoelomorpha, have proved highly contentious. Ctenophora have been proposed as the most distant relatives of all other animals (Ctenophora-first rather than the traditional Porifera-first). Xenacoelomorpha may be primitively simple relatives of all other bilaterally symmetrical animals (Nephrozoa) or simplified relatives of echinoderms and hemichordates (Xenambulacraria). In both cases, one of the alternative topologies must be a result of errors in tree reconstruction. Here, using empirical data and simulations, we show that the Ctenophora-first and Nephrozoa topologies (but not Porifera-first and Ambulacraria topologies) are strongly supported by analyses affected by systematic errors. Accommodating this finding suggests that empirical studies supporting Ctenophora-first and Nephrozoa trees are likely to be explained by systematic error. This would imply that the alternative Porifera-first and Xenambulacraria topologies, which are supported by analyses designed to minimize systematic error, are the most credible current alternatives.
| Type: | Article |
|---|---|
| Title: | Topology-dependent asymmetry in systematic errors affects phylogenetic placement of Ctenophora and Xenacoelomorpha |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/sciadv.abc5162 |
| Publisher version: | https://doi.org/10.1126/sciadv.abc5162 |
| Language: | English |
| Additional information: | This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10118427 |
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