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New opabiniid diversifies the weirdest wonders of the euarthropod stem group

Once considered ‘weird wonders’ of the Cambrian, the emblematic Burgess Shale animals Anomalocaris and Opabinia are now recognized as lower stem-group euarthropods and have provided crucial data for constraining the polarity of key morphological characters in the group. Anomalocaris and its relative...

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Autores principales: Pates, Stephen, Wolfe, Joanna M., Lerosey-Aubril, Rudy, Daley, Allison C., Ortega-Hernández, Javier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8826304/
https://www.ncbi.nlm.nih.gov/pubmed/35135344
http://dx.doi.org/10.1098/rspb.2021.2093
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author Pates, Stephen
Wolfe, Joanna M.
Lerosey-Aubril, Rudy
Daley, Allison C.
Ortega-Hernández, Javier
author_facet Pates, Stephen
Wolfe, Joanna M.
Lerosey-Aubril, Rudy
Daley, Allison C.
Ortega-Hernández, Javier
author_sort Pates, Stephen
collection PubMed
description Once considered ‘weird wonders’ of the Cambrian, the emblematic Burgess Shale animals Anomalocaris and Opabinia are now recognized as lower stem-group euarthropods and have provided crucial data for constraining the polarity of key morphological characters in the group. Anomalocaris and its relatives (radiodonts) had worldwide distribution and survived until at least the Devonian. However, despite intense study, Opabinia remains the only formally described opabiniid to date. Here we reinterpret a fossil from the Wheeler Formation of Utah as a new opabiniid, Utaurora comosa nov. gen. et sp. By visualizing the sample of phylogenetic topologies in treespace, our results fortify support for the position of U. comosa beyond the nodal support traditionally applied. Our phylogenetic evidence expands opabiniids to multiple Cambrian stages. Our results underscore the power of treespace visualization for resolving imperfectly preserved fossils and expanding the known diversity and spatio-temporal ranges within the euarthropod lower stem group.
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spelling pubmed-88263042022-02-10 New opabiniid diversifies the weirdest wonders of the euarthropod stem group Pates, Stephen Wolfe, Joanna M. Lerosey-Aubril, Rudy Daley, Allison C. Ortega-Hernández, Javier Proc Biol Sci Palaeobiology Once considered ‘weird wonders’ of the Cambrian, the emblematic Burgess Shale animals Anomalocaris and Opabinia are now recognized as lower stem-group euarthropods and have provided crucial data for constraining the polarity of key morphological characters in the group. Anomalocaris and its relatives (radiodonts) had worldwide distribution and survived until at least the Devonian. However, despite intense study, Opabinia remains the only formally described opabiniid to date. Here we reinterpret a fossil from the Wheeler Formation of Utah as a new opabiniid, Utaurora comosa nov. gen. et sp. By visualizing the sample of phylogenetic topologies in treespace, our results fortify support for the position of U. comosa beyond the nodal support traditionally applied. Our phylogenetic evidence expands opabiniids to multiple Cambrian stages. Our results underscore the power of treespace visualization for resolving imperfectly preserved fossils and expanding the known diversity and spatio-temporal ranges within the euarthropod lower stem group. The Royal Society 2022-02-09 2022-02-09 /pmc/articles/PMC8826304/ /pubmed/35135344 http://dx.doi.org/10.1098/rspb.2021.2093 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Palaeobiology
Pates, Stephen
Wolfe, Joanna M.
Lerosey-Aubril, Rudy
Daley, Allison C.
Ortega-Hernández, Javier
New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title_full New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title_fullStr New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title_full_unstemmed New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title_short New opabiniid diversifies the weirdest wonders of the euarthropod stem group
title_sort new opabiniid diversifies the weirdest wonders of the euarthropod stem group
topic Palaeobiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8826304/
https://www.ncbi.nlm.nih.gov/pubmed/35135344
http://dx.doi.org/10.1098/rspb.2021.2093
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