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Experimental taphon...
Experimental taphonomy of giant sulphur bacteria: implications for the interpretation of the embryo-like Ediacaran Doushantuo fossils.
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Cunningham, J. A. (författare)
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Thomas, C.-W. (författare)
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- Bengtson, Stefan, 1947- (författare)
- Naturhistoriska riksmuseet,Enheten för paleobiologi
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- Marone, Federica (författare)
- Paul Scherrer Institute,Swiss Light Source
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- Stampanoni, Marco (författare)
- ETH Zürich,Swiss Light Source
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Turner, F. R. (författare)
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Bailey, J. V. (författare)
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Raff, R. A. (författare)
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Raff, E. C. (författare)
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- Donoghue, Philip C.J. (författare)
- University of Bristol
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(creator_code:org_t)
- 2011-12-07
- 2012
- Engelska.
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Ingår i: Proceedings of the Royal Society of London. B. Biological Sciences. - : The Royal Society. - 0962-8452 .- 1471-2954. ; 279:1734, s. 1857-1864
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https://doi.org/10.1...
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https://nrm.diva-por... (primary) (Raw object)
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https://royalsociety...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Ediacaran Doushantuo biota has yielded fossils interpreted as eukaryotic organisms, either animal embryos or eukaryotes basal or distantly related to Metazoa. However, the fossils have been interpreted alternatively as giant sulphur bacteria similar to the extant Thiomargarita. To test this hypothesis, living and decayed Thiomargarita were compared with Doushantuo fossils and experimental taphonomic pathways were compared with modern embryos. In the fossils, as in eukaryotic cells, subcellular structures are distributed throughout cell volume; in Thiomargarita, a central vacuole encompasses approximately 98 per cent cell volume. Key features of the fossils, including putative lipid vesicles and nuclei, complex envelope ornament, and ornate outer vesicles are incompatible with living and decay morphologies observed in Thiomargarita. Microbial taphonomy of Thiomargarita also differed from that of embryos. Embryo tissues can be consumed and replaced by bacteria, forming a replica composed of a threedimensional biofilm, a stable fabric for potential fossilization. Vacuolated Thiomargarita cells collapse easily and do not provide an internal substrate for bacteria. The findings do not support the hypothesis that giant sulphur bacteria are an appropriate interpretative model for the embryo-like Doushantuo fossils. However, sulphur bacteria may have mediated fossil mineralization and may provide a potential bacterial analogue for other macroscopic Precambrian remains.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Nyckelord
- Protist
- Moneran
- Development
- Taphonomy
- Diagenesis
- The changing Earth
- Den föränderliga jorden
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Cunningham, J. A ...
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Thomas, C.-W.
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Bengtson, Stefan ...
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Marone, Federica
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Stampanoni, Marc ...
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Turner, F. R.
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visa fler...
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Bailey, J. V.
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Raff, R. A.
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Raff, E. C.
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Donoghue, Philip ...
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visa färre...
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Naturhistoriska riksmuseet