Results 1 to 10 of about 16,764 (247)
Ediacaran origin and Ediacaran-Cambrian diversification of Metazoa. [PDF]
Sci AdvThe timescale of animal diversification has been a focus of debate over how evolutionary history should be calibrated to geologic time. Molecular clock analyses have invariably estimated a Cryogenian or Tonian origin of animals while unequivocal animal ...
Carlisle E +3 more
europepmc +5 more sources
The tempo of Ediacaran evolution [PDF]
Science Advances, 2021 New radio-isotopic data bracket the age of late Ediacaran fossil assemblages and two negative carbon isotope excursions.
Chuan Yang, Alan D Rooney, Daniel Condon
exaly +8 more sources
Causes and consequences of end-Ediacaran extinction: An update
Cambridge Prisms: Extinction, 2023 Since the 1980s, the existence of one or more extinction events in the late Ediacaran has been the subject of debate. Discussion surrounding these events has intensified in the last decade, in concert with efforts to understand drivers of global change ...
Simon A.F. Darroch +5 more
doaj +2 more sources
Recurrent photic zone euxinia limited ocean oxygenation and animal evolution during the Ediacaran
Nature Communications, 2023 The Ediacaran Period (~635–539 Ma) is marked by the emergence and diversification of complex metazoans linked to ocean redox changes, but the processes and mechanism of the redox evolution in the Ediacaran ocean are intensely debated. Here we use mercury
Wang Zheng +8 more
doaj +2 more sources
Calibrating the coevolution of Ediacaran life and environment
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance Our understanding of the interactions between animal evolution, biogeochemical cycling, and global tectonics during the Ediacaran Period (635 to 541 Ma) is severely hampered by lack of a robust temporal framework.
Alan D Rooney +2 more
exaly +2 more sources
Discovery of bilaterian-type through-guts in cloudinomorphs from the terminal Ediacaran Period [PDF]
Nature Communications, 2020 The fossil record of the terminal Ediacaran Period is typified by the iconic index fossil Cloudina and its relatives. These tube-dwellers are presumed to be primitive metazoans, but resolving their phylogenetic identity has remained a point of contention.
J. Schiffbauer +7 more
semanticscholar +6 more sources
Ediacaran-Cambrian paleosols of Nevada and California. [PDF]
PLoS ONEThe Cambrian and Ediacaran sequence of California and Nevada is rife with unconformities, paleovalleys, paleosols, and fluvial facies. This study confirms shallow marine environments for grey stromatolitic dolostone and shale of northern localities (Mt ...
Gregory J Retallack
doaj +2 more sources
PLoS Biology, 2022 The first animals appear during the late Ediacaran (572 to 541 Ma); an initial diversity increase was followed reduction in diversity, often interpreted as catastrophic mass extinction.
Rebecca Eden +2 more
doaj +2 more sources
Chronology of Ediacaran sedimentary and biogeochemical shifts along eastern Gondwanan margins
Communications Earth & EnvironmentDetermining causal relationships between environmental change and early animal evolution has been limited by our lack of a robust temporal framework for the Ediacaran Period (635-539 million years ago).
Marjorie D. Cantine +5 more
doaj +2 more sources
Sea level controls on Ediacaran-Cambrian animal radiations. [PDF]
Sci AdvThe drivers of Ediacaran-Cambrian metazoan radiations remain unclear, as does the fidelity of the record. We use a global age framework [580–510 million years (Ma) ago] to estimate changes in marine sedimentary rock volume and area, reconstructed ...
Bowyer FT, Wood RA, Yilales M.
europepmc +2 more sources