Results 211 to 220 of about 14,980 (261)
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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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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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Nature, 2012
Ediacaran (635-542 million years ago) fossils have been regarded as early animal ancestors of the Cambrian evolutionary explosion of marine invertebrate phyla, as giant marine protists and as lichenized fungi. Recent documentation of palaeosols in the Ediacara Member of the Rawnsley Quartzite of South Australia confirms past interpretations of lagoonal-
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Ediacaran (635-542 million years ago) fossils have been regarded as early animal ancestors of the Cambrian evolutionary explosion of marine invertebrate phyla, as giant marine protists and as lichenized fungi. Recent documentation of palaeosols in the Ediacara Member of the Rawnsley Quartzite of South Australia confirms past interpretations of lagoonal-
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Paleontology: Paleogastronomy in the Ediacaran
Current Biology, 2022Preserved lipid biomarkers provide a unique window onto the biology of fossil organisms. A new study uses lipids to assess the gut contents of three fossils from the 'dawn of animals' in the Ediacaran, with implications for their feeding behaviors.
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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 intracontinental channel flow
Geology, 2009Migmatitic lower-crustal rocks in the Ediacaran intracontinental Petermann orogen, central Australia, are bounded by regional-scale, low-angle shear fabrics that record opposing shear senses. New sensitive high-resolution ion microprobe (SHRIMP) titanite geochronology suggests that the contrasting shear systems developed synchronously.
Raimondo, T. +6 more
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Wonderful Ediacarans, wonderful cnidarians?
Evolution & Development, 2008In Wonderful Life, Stephen Jay Gould (1989) argued that the morphological range of arthropods recovered from the Middle Cambrian Burgess Shale fauna in British Columbia demonstrated that morphologic diversity increased more rapidly than taxonomic diversity.
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Ediacaran ocean redox evolution
2015The relative role that environmental versus intrinsic biological factors played in shaping the history of life on Earth is a fundamental but unanswered question in the natural sciences. Most famously, it has been heavily debated if the emergence and diversification of early animals during the Ediacaran Period (ca.
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A late Ediacaran ice age: The key node in the Earth system evolution
Earth-Science Reviews, 2023Bing Shen
exaly