Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina
Abstract Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar m...
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Online Access: | http://dx.doi.org/10.1002/spp2.1531 https://onlinelibrary.wiley.com/doi/pdf/10.1002/spp2.1531 |
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crwiley:10.1002/spp2.1531 2024-06-02T08:02:16+00:00 Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina Psarras, Christos Donoghue, Philip C.J. Garwood, Russell J. Grazhdankin, Dmitriy V. Parry, Luke A. Rogov, Vladimir I. Liu, Alexander G. Natural Environment Research Council Russian Science Foundation St. Edmund Hall, University of Oxford National Natural Science Foundation of China 2023 http://dx.doi.org/10.1002/spp2.1531 https://onlinelibrary.wiley.com/doi/pdf/10.1002/spp2.1531 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Papers in Palaeontology volume 9, issue 6 ISSN 2056-2799 2056-2802 journal-article 2023 crwiley https://doi.org/10.1002/spp2.1531 2024-05-03T11:45:26Z Abstract Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar material from other global localities support a body fossil origin. Here we combine x‐ray computed tomography, scanning electron microscopy and petrographic methods to evaluate the body or trace fossil nature of Nenoxites from the Khatyspyt Formation. The fossilized structures consist of densely packed chains of three‐dimensionally preserved silicic, bowl‐shaped elements surrounded by distinct sedimentary halos, in a dolomitized matrix. Individual bowl‐shaped elements can exhibit diffuse mineralogical boundaries and bridging connections between elements, both considered here to result from silicification and dolomitization during diagenesis. This new morphological and petrological evidence, in conjunction with recent studies of the late Ediacaran tubular taxa Ordinilunulatus and Shaanxilithes from China, suggest that the Khatyspyt specimens most probably reflect a coquina deposit of Shaanxilithes‐ like body fossils. Our data support the possibility of Shaanxilithes ‐like organisms representing total group eumetazoans. Article in Journal/Newspaper Arctic Siberia Wiley Online Library Arctic Papers in Palaeontology 9 6 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar material from other global localities support a body fossil origin. Here we combine x‐ray computed tomography, scanning electron microscopy and petrographic methods to evaluate the body or trace fossil nature of Nenoxites from the Khatyspyt Formation. The fossilized structures consist of densely packed chains of three‐dimensionally preserved silicic, bowl‐shaped elements surrounded by distinct sedimentary halos, in a dolomitized matrix. Individual bowl‐shaped elements can exhibit diffuse mineralogical boundaries and bridging connections between elements, both considered here to result from silicification and dolomitization during diagenesis. This new morphological and petrological evidence, in conjunction with recent studies of the late Ediacaran tubular taxa Ordinilunulatus and Shaanxilithes from China, suggest that the Khatyspyt specimens most probably reflect a coquina deposit of Shaanxilithes‐ like body fossils. Our data support the possibility of Shaanxilithes ‐like organisms representing total group eumetazoans. |
author2 |
Natural Environment Research Council Russian Science Foundation St. Edmund Hall, University of Oxford National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Psarras, Christos Donoghue, Philip C.J. Garwood, Russell J. Grazhdankin, Dmitriy V. Parry, Luke A. Rogov, Vladimir I. Liu, Alexander G. |
spellingShingle |
Psarras, Christos Donoghue, Philip C.J. Garwood, Russell J. Grazhdankin, Dmitriy V. Parry, Luke A. Rogov, Vladimir I. Liu, Alexander G. Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
author_facet |
Psarras, Christos Donoghue, Philip C.J. Garwood, Russell J. Grazhdankin, Dmitriy V. Parry, Luke A. Rogov, Vladimir I. Liu, Alexander G. |
author_sort |
Psarras, Christos |
title |
Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
title_short |
Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
title_full |
Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
title_fullStr |
Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
title_full_unstemmed |
Three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
title_sort |
three‐dimensional reconstruction, taphonomic and petrological data suggest that the oldest record of bioturbation is a body fossil coquina |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/spp2.1531 https://onlinelibrary.wiley.com/doi/pdf/10.1002/spp2.1531 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_source |
Papers in Palaeontology volume 9, issue 6 ISSN 2056-2799 2056-2802 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/spp2.1531 |
container_title |
Papers in Palaeontology |
container_volume |
9 |
container_issue |
6 |
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1800746766656602112 |