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  Algal origin of sponge sterane biomarkers negates the oldest evidence for animals in the rock record

Bobrovskiy, I., Hope, J. M., Nettersheim, B. J., Volkman, J. K., Hallmann, C., Brocks, J. J. (2021): Algal origin of sponge sterane biomarkers negates the oldest evidence for animals in the rock record. - Nature Ecology & Evolution, 5, 165-168.
https://doi.org/10.1038/s41559-020-01334-7

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008807 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008807_1
Genre: Journal Article

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 Creators:
Bobrovskiy, Ilya1, Author
Hope, Janet M.1, Author
Nettersheim, Benjamin J.1, Author
Volkman, John K.1, Author
Hallmann, Christian2, Author              
Brocks, Jochen J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
20 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146023              

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 Abstract: The earliest fossils of animal-like organisms occur in Ediacaran rocks that are approximately 571 million years old. Yet 24-isopropylcholestanes and other C30 fossil sterol molecules have been suggested to reflect an important ecological role of demosponges as the first abundant animals by the end of the Cryogenian period (>635 million years ago). Here, we demonstrate that C30 24-isopropylcholestane is not diagnostic for sponges and probably formed in Neoproterozoic sediments through the geological methylation of C29 sterols of chlorophyte algae, the dominant eukaryotes at that time. These findings reconcile biomarker evidence with the geological record and revert the oldest evidence for animals back into the latest Ediacaran.

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 Dates: 2020-11-232021
 Publication Status: Finally published
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 Identifiers: DOI: 10.1038/s41559-020-01334-7
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Title: Nature Ecology & Evolution
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 5 Sequence Number: - Start / End Page: 165 - 168 Identifier: ISSN: 2397-334X
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/202002112
Publisher: Springer Nature