Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada
Existing paleontological data indicate marked eukaryote diversification in the Neoproterozoic, ca. 800 Ma, driven by predation pressure and various other biotic and abiotic factors. Although the eukaryotic record remains less diverse before that time, molecular clock estimates and earliest crown-gro...
Published in: | Emerging Topics in Life Sciences |
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Online Access: | http://dx.doi.org/10.1042/etls20170153 https://portlandpress.com/emergtoplifesci/article-pdf/2/2/247/485085/etls-2017-0153c.pdf |
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crportlandpress:10.1042/etls20170153 2024-09-09T19:22:53+00:00 Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada Loron, Corentin C. Rainbird, Robert H. Turner, Elizabeth C. Greenman, J. Wilder Javaux, Emmanuelle J. Lyons, Timothy W. Droser, Mary L. Lau, Kimberly V. Porter, Susannah M. 2018 http://dx.doi.org/10.1042/etls20170153 https://portlandpress.com/emergtoplifesci/article-pdf/2/2/247/485085/etls-2017-0153c.pdf en eng Portland Press Ltd. Emerging Topics in Life Sciences volume 2, issue 2, page 247-255 ISSN 2397-8554 2397-8562 journal-article 2018 crportlandpress https://doi.org/10.1042/etls20170153 2024-08-29T04:11:27Z Existing paleontological data indicate marked eukaryote diversification in the Neoproterozoic, ca. 800 Ma, driven by predation pressure and various other biotic and abiotic factors. Although the eukaryotic record remains less diverse before that time, molecular clock estimates and earliest crown-group affiliated microfossils suggest that the diversification may have originated during the Mesoproterozoic. Within new assemblages of organic-walled microfossils from the ca. 1150 to 900 Ma lower Shaler Supergroup of Arctic Canada, numerous specimens from various taxa display circular and ovoid perforations on their walls, interpreted as probable traces of selective protist predation, 150–400 million years before their first reported incidence in the Neoproterozoic. Selective predation is a more complex behavior than phagotrophy, because it requires sensing and selection of prey followed by controlled lysis of the prey wall. The ca. 800 Ma eukaryotic diversification may have been more gradual than previously thought, beginning in the late Mesoproterozoic, as indicated by recently described microfossil assemblages, in parallel with the evolution of selective eukaryovory and the spreading of eukaryotic photosynthesis in marine environments. Article in Journal/Newspaper Arctic Portland Press Arctic Canada Emerging Topics in Life Sciences 2 2 247 255 |
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Portland Press |
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crportlandpress |
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English |
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Existing paleontological data indicate marked eukaryote diversification in the Neoproterozoic, ca. 800 Ma, driven by predation pressure and various other biotic and abiotic factors. Although the eukaryotic record remains less diverse before that time, molecular clock estimates and earliest crown-group affiliated microfossils suggest that the diversification may have originated during the Mesoproterozoic. Within new assemblages of organic-walled microfossils from the ca. 1150 to 900 Ma lower Shaler Supergroup of Arctic Canada, numerous specimens from various taxa display circular and ovoid perforations on their walls, interpreted as probable traces of selective protist predation, 150–400 million years before their first reported incidence in the Neoproterozoic. Selective predation is a more complex behavior than phagotrophy, because it requires sensing and selection of prey followed by controlled lysis of the prey wall. The ca. 800 Ma eukaryotic diversification may have been more gradual than previously thought, beginning in the late Mesoproterozoic, as indicated by recently described microfossil assemblages, in parallel with the evolution of selective eukaryovory and the spreading of eukaryotic photosynthesis in marine environments. |
author2 |
Lyons, Timothy W. Droser, Mary L. Lau, Kimberly V. Porter, Susannah M. |
format |
Article in Journal/Newspaper |
author |
Loron, Corentin C. Rainbird, Robert H. Turner, Elizabeth C. Greenman, J. Wilder Javaux, Emmanuelle J. |
spellingShingle |
Loron, Corentin C. Rainbird, Robert H. Turner, Elizabeth C. Greenman, J. Wilder Javaux, Emmanuelle J. Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
author_facet |
Loron, Corentin C. Rainbird, Robert H. Turner, Elizabeth C. Greenman, J. Wilder Javaux, Emmanuelle J. |
author_sort |
Loron, Corentin C. |
title |
Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
title_short |
Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
title_full |
Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
title_fullStr |
Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
title_full_unstemmed |
Implications of selective predation on the macroevolution of eukaryotes: evidence from Arctic Canada |
title_sort |
implications of selective predation on the macroevolution of eukaryotes: evidence from arctic canada |
publisher |
Portland Press Ltd. |
publishDate |
2018 |
url |
http://dx.doi.org/10.1042/etls20170153 https://portlandpress.com/emergtoplifesci/article-pdf/2/2/247/485085/etls-2017-0153c.pdf |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Emerging Topics in Life Sciences volume 2, issue 2, page 247-255 ISSN 2397-8554 2397-8562 |
op_doi |
https://doi.org/10.1042/etls20170153 |
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Emerging Topics in Life Sciences |
container_volume |
2 |
container_issue |
2 |
container_start_page |
247 |
op_container_end_page |
255 |
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1809763220897923072 |