Results 201 to 210 of about 12,978 (245)
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Ediacaran Extinction and Cambrian Explosion
Trends in Ecology & Evolution, 2018The Ediacaran-Cambrian (E-C) transition marks the most important geobiological revolution of the past billion years, including the Earth's first crisis of macroscopic eukaryotic life, and its most spectacular evolutionary diversification. Here, we describe competing models for late Ediacaran extinction, summarize evidence for these models, and outline ...
Simon A.F. Darroch +3 more
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Ediacaran scavenging as a prelude to predation
Emerging Topics in Life Sciences, 2018Predation is one of the most fundamental ecological and evolutionary drivers in modern and ancient ecosystems. Here, we report the discovery of evidence of the oldest scavenging of shallowly buried bodies of iconic soft-bodied members of the Ediacara Biota by cryptic seafloor mat-burrowing animals that produced the furrow and levee trace fossil ...
James G, Gehling, Mary L, Droser
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Ediacaran Cordilleran-type mountain ice sheets and their erosion effects
Earth-Science ReviewsGlacial erosion has long been recognized as a significant factor contributing to continental denudation during the Ediacaran Period, consequently leading to geochemical perturbations and biotic evolution in marine environments.
Guochun Zhao, Brian G Jones, G R Shi
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Geology, 2002
Epifaunal tiering, the subdivision of vertical space within a community, is a fundamental attribute of Phanerozoic suspension-feeding communities. This paper documents tiering, including the presence of meter-tall organisms, in Neoproterozoic Ediacaran communities.
M.E. Clapham, G.M. Narbonne
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Epifaunal tiering, the subdivision of vertical space within a community, is a fundamental attribute of Phanerozoic suspension-feeding communities. This paper documents tiering, including the presence of meter-tall organisms, in Neoproterozoic Ediacaran communities.
M.E. Clapham, G.M. Narbonne
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Correlating the Ediacaran of Australia
Geological Society, London, Special Publications, 2007Abstract Now that a Global Stratotype Section and Point (GSSP) has been ratified and a new system defined for the terminal Proterozoic era, the Ediacaran, the next step is to develop global correlations and to further subdivide this system. Means of correlating and subdividing older parts of the Proterozoic era are also needed.
K. Grey, C. R. Calver
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Lethaia, 2007
Enigmatic discoidal fossils are common in Neoproterozoic sedimentary sequences and in the stratigraphic record pre-date the first appearance of diverse Ediacaran fossil assemblages. Termed ‘medusoids’, these Neoproterozoic discoidal fossils have generally been interpreted as coelenterate-grade organisms implying a radially symmetrical body plan for ...
Dmitriy Grazhdankin, Gisela Gerdes
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Enigmatic discoidal fossils are common in Neoproterozoic sedimentary sequences and in the stratigraphic record pre-date the first appearance of diverse Ediacaran fossil assemblages. Termed ‘medusoids’, these Neoproterozoic discoidal fossils have generally been interpreted as coelenterate-grade organisms implying a radially symmetrical body plan for ...
Dmitriy Grazhdankin, Gisela Gerdes
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Science, 2004
Fossils discovered in the Flinders Ranges of Australia in 1946 represent the most ancient complex animals that Earth has ever seen. Termed the Ediacara biota, these extinct animals are as enigmatic as they are beautiful. As Brasier and Antcliffe discuss in their Perspective, a large collection of remarkably well-preserved Ediacaran fossils ...
Martin Brasier, Jonathan Antcliffe
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Fossils discovered in the Flinders Ranges of Australia in 1946 represent the most ancient complex animals that Earth has ever seen. Termed the Ediacara biota, these extinct animals are as enigmatic as they are beautiful. As Brasier and Antcliffe discuss in their Perspective, a large collection of remarkably well-preserved Ediacaran fossils ...
Martin Brasier, Jonathan Antcliffe
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Abstract Below the base of the Cambrian lies the Ediacaran period. Unexpectedly, a diverse biota of large fossils has been found at several sites around the world. It is especially well represented at the classical locality in South Australia, where upright fronds, prostrate leaf-shaped organisms with an odd kind of segmentation, and ...
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Abstract The meiofauna scenario does not define the sequence of body plans leading to modern animals. This chapter suggests a sequence of viable body plans, demonstrated whenever possible by fossils or relics, and linked by plausible transitions that offer some immediate benefit.
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