ArticleProceedings. Biological sciences2012
Experimental taphonomy of giant sulphur bacteria: implications for the interpretation of the embryo-like Ediacaran Doushantuo fossils.
Article in Proceedings. Biological sciences, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 49 citations in OpenAlex.
- The Pathway of Sulfide Oxidation to Octasulfur Globules in the Cytoplasm of Aerobic Bacteria.Applied and environmental microbiology · 2022Article
- Experimental taphonomy of organelles and the fossil record of early eukaryote evolution.Science advances · 2021Article
- Factors That Affect the Enlargement of Bacterial Protoplasts and Spheroplasts.International journal of molecular sciences · 2020Review
- Species-dependent protoplast enlargement involves different types of vacuole generation in bacteria.Scientific reports · 2020Article
- Three-dimensional preservation of cellular and subcellular structures suggests 1.6 billion-year-old crown-group red algae.PLoS biology · 2017Article
- A multicellular organism with embedded cell clusters from the Ediacaran Weng'an biota (Doushantuo Formation, South China).Evolution & development · 2016Article
- Molecular clocks and the early evolution of metazoan nervous systems.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015Review
- Evolution of the macromolecular structure of sporopollenin during thermal degradation.Heliyon · 2015Article
- Experimental taphonomy of Artemia reveals the role of endogenous microbes in mediating decay and fossilization.Proceedings. Biological sciences · 2015Article
- Article
- Distinguishing geology from biology in the Ediacaran Doushantuo biota relaxes constraints on the timing of the origin of bilaterians.Proceedings. Biological sciences · 2012Article
- The role of microbes in the formation of modern and ancient phosphatic mineral deposits.Frontiers in microbiology · 2012Article
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10 authors at 5 institutions in 5 countries.
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No grant is acknowledged in the PubMed record.
Abstract
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 three-dimensional 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.
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