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The 635-million-year-old like fungi microfossils found on land

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  • The 635-million-year-old like fungi microfossils found on land

    More discoveries concerning the complexity of life in the Ediacaran 635 million years ago.

    Source: http://www.sci-news.com/paleontology/ediacaran-fungi-09298.html



    Paleontologists Find 635-Million-Year-Old Land Fungus-Like Fossils

    Jan 28, 2021 by Enrico de Lazaro
    « Previous
    | The 635-million-year-old pyritized fungus-like microfossils found in the Ediacaran-period Doushantuo Formation in China provide direct fossil evidence for the colonization of land by fungi.

    The Ediacaran-period fungus-like fossils were found in small cavities within well-studied sedimentary dolostone rocks of the Doushantuo Formation at Weng’an, South China.
    “It was an accidental discovery. At that moment, we realized that this could be the fossil that scientists have been looking for a long time,” said Tian Gan, a Ph.D. student at the Virginia Tech.
    “If our interpretation is correct, it will be helpful for understanding the paleoclimate change and early life evolution.”
    The Doushantuo microfossils are pyritized but contain trace amount of organic matter. They include branching filaments of two morphological types and associated hollow spheres. The filaments are hundreds of microns in length at the minimum, and can be straight, curved, or bent. The team’s analysis indicates that they likely represent fungal microorganisms that colonized karstic environments sometime between 635 and 632 million years ago. They may have played a role in catalyzing atmospheric oxygenation and biospheric evolution in the aftermath of the catastrophic ‘snowball Earth’ event.

    © Copyright Original Source



    Source: http://www.sci-news.com/paleontology...ngi-09298.html

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  • #2
    Nice find.


    The full paper, Cryptic terrestrial fungus-like fossils of the early Ediacaran Period can be read by clicking on the hyperlink. Here is the abstract:

    Abstract

    The colonization of land by fungi had a significant impact on the terrestrial ecosystem and biogeochemical cycles on Earth surface systems. Although fungi may have diverged ~1500–900 million years ago (Ma) or even as early as 2400 Ma, it is uncertain when fungi first colonized the land. Here we report pyritized fungus-like microfossils preserved in the basal Ediacaran Doushantuo Formation (~635 Ma) in South China. These micro-organisms colonized and were preserved in cryptic karstic cavities formed via meteoric water dissolution related to deglacial isostatic rebound after the terminal Cryogenian snowball Earth event. They are interpreted as eukaryotes and probable fungi, thus providing direct fossil evidence for the colonization of land by fungi and offering a key constraint on fungal terrestrialization.


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