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A new stem group echinoid from the Triassic of China leads to a revised macroevolutionary history of echinoids during the end-Permian mass extinction.R Soc Open Sci. 2018 Jan; 5(1):171548.RS
Abstract
The Permian-Triassic bottleneck has long been thought to have drastically altered the course of echinoid evolution, with the extinction of the entire echinoid stem group having taken place during the end-Permian mass extinction. The Early Triassic fossil record of echinoids is, however, sparse, and new fossils are paving the way for a revised interpretation of the evolutionary history of echinoids during the Permian-Triassic crisis and Early Mesozoic. A new species of echinoid, Yunnanechinus luopingensis n. sp. recovered from the Middle Triassic (Anisian) Luoping Biota fossil Lagerstätte of South China, displays morphologies that are not characteristic of the echinoid crown group. We have used phylogenetic analyses to further demonstrate that Yunnanechinus is not a member of the echinoid crown group. Thus a clade of stem group echinoids survived into the Middle Triassic, enduring the global crisis that characterized the end-Permian and Early Triassic. Therefore, stem group echinoids did not go extinct during the Palaeozoic, as previously thought, and appear to have coexisted with the echinoid crown group for at least 23 million years. Stem group echinoids thus exhibited the Lazarus effect during the latest Permian and Early Triassic, while crown group echinoids did not.
Links
Pub Type(s)
Journal Article
Language
eng
PubMed ID
29410858
Citation
Thompson, Jeffrey R., et al. "A New Stem Group Echinoid From the Triassic of China Leads to a Revised Macroevolutionary History of Echinoids During the end-Permian Mass Extinction." Royal Society Open Science, vol. 5, no. 1, 2018, p. 171548.
Thompson JR, Hu SX, Zhang QY, et al. A new stem group echinoid from the Triassic of China leads to a revised macroevolutionary history of echinoids during the end-Permian mass extinction. R Soc Open Sci. 2018;5(1):171548.
Thompson, J. R., Hu, S. X., Zhang, Q. Y., Petsios, E., Cotton, L. J., Huang, J. Y., Zhou, C. Y., Wen, W., & Bottjer, D. J. (2018). A new stem group echinoid from the Triassic of China leads to a revised macroevolutionary history of echinoids during the end-Permian mass extinction. Royal Society Open Science, 5(1), 171548. https://doi.org/10.1098/rsos.171548
Thompson JR, et al. A New Stem Group Echinoid From the Triassic of China Leads to a Revised Macroevolutionary History of Echinoids During the end-Permian Mass Extinction. R Soc Open Sci. 2018;5(1):171548. PubMed PMID: 29410858.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR
T1 - A new stem group echinoid from the Triassic of China leads to a revised macroevolutionary history of echinoids during the end-Permian mass extinction.
AU - Thompson,Jeffrey R,
AU - Hu,Shi-Xue,
AU - Zhang,Qi-Yue,
AU - Petsios,Elizabeth,
AU - Cotton,Laura J,
AU - Huang,Jin-Yuan,
AU - Zhou,Chang-Yong,
AU - Wen,Wen,
AU - Bottjer,David J,
Y1 - 2018/01/31/
PY - 2017/10/05/received
PY - 2017/12/21/accepted
PY - 2018/2/8/entrez
PY - 2018/2/8/pubmed
PY - 2018/2/8/medline
KW - Lazarus effect
KW - Luoping Biota
KW - Triassic
KW - echinoderm
KW - sea urchin
SP - 171548
EP - 171548
JF - Royal Society open science
JO - R Soc Open Sci
VL - 5
IS - 1
N2 - The Permian-Triassic bottleneck has long been thought to have drastically altered the course of echinoid evolution, with the extinction of the entire echinoid stem group having taken place during the end-Permian mass extinction. The Early Triassic fossil record of echinoids is, however, sparse, and new fossils are paving the way for a revised interpretation of the evolutionary history of echinoids during the Permian-Triassic crisis and Early Mesozoic. A new species of echinoid, Yunnanechinus luopingensis n. sp. recovered from the Middle Triassic (Anisian) Luoping Biota fossil Lagerstätte of South China, displays morphologies that are not characteristic of the echinoid crown group. We have used phylogenetic analyses to further demonstrate that Yunnanechinus is not a member of the echinoid crown group. Thus a clade of stem group echinoids survived into the Middle Triassic, enduring the global crisis that characterized the end-Permian and Early Triassic. Therefore, stem group echinoids did not go extinct during the Palaeozoic, as previously thought, and appear to have coexisted with the echinoid crown group for at least 23 million years. Stem group echinoids thus exhibited the Lazarus effect during the latest Permian and Early Triassic, while crown group echinoids did not.
SN - 2054-5703
UR - https://www.unboundmedicine.com/medline/citation/29410858/A_new_stem_group_echinoid_from_the_Triassic_of_China_leads_to_a_revised_macroevolutionary_history_of_echinoids_during_the_end_Permian_mass_extinction_
L2 - https://royalsocietypublishing.org/doi/10.1098/rsos.171548?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed
DB - PRIME
DP - Unbound Medicine
ER -
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