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Topic: Ediacaran biota

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Paleontology and Geology Glossary: E Vendian biota (Ediacaran fauna), included soft-bodied multi-cellular animals, like sponges, cnidarians, worms, and soft-bodied relatives of the arthropods. Ediacaran fauna is the animal life that lived during the Vendian or Ediacaran period (roughly 650 to 544 million years ago). The Ediacaran period was named for the Ediacara Hills in South Australia (the word Ediacaran is of Australian Aboriginal origin and means a place where there is water). www.zoomdinosaurs.com /subjects/dinosaurs/glossary/indexe.shtml   (4966 words)

PALEONTOLOGY: ON EDIACARANS Grazhdankin, D. Patterns of distribution in the Ediacaran biotas: facies versus biogeography and evolution. Antcliffe, M. Brasier, Workshop on the Rise and Fall of the Vendian (Ediacaran) Biota, International Commission of Stratigraphy, Prato, Italy, August 2004 They suggest that members of the Ediacara biota were uniquely fashioned beasts that met their doom at the end of the Precambrian. scienceweek.com /2005/sw050325-2.htm   (1488 words)

Journal of Paleontology: THECTARDIS AVALONENSIS: A NEW EDIACARAN FOSSIL FROM THE MISTAKEN POINT BIOTA, NEWFOUNDLAND The Neoproterozoic Ediacara biota at Mistaken Point contains the oldest diverse Ediacaran assemblages and is one of the few known deepwater localities, yet the biota is dominated by endemic forms, nearly all of which remain undeseribed. In addition, the occurrence of the fossils as untransported census populations beneath beds of volcanic ash (Seilacher, 1992; Narbonne, 1998) provides perhaps the best opportunity anywhere to study the ecology of the Ediacara biota (e.g., Seilacher, 1999; Clapham and Narbonne, 2002; Clapham et al., 2003). Thectardis also only occurs on bedding planes in association with rich assemblages of Ediacaran fossils, including cosmopolitan taxa such as Charnia and Charniodiscus. www.findarticles.com /p/articles/mi_qa3790/is_200411/ai_n9461517   (1353 words)

Neoproterozoic - Wikipedia, the free encyclopedia Russian geologists referred to the final period of the Neoproterozoic as the Vendian, while the Chinese called it the Sinian, and most Australians and North Americans used the name Ediacaran. However, in 2004, the International Union of Geological Sciences ratified the Ediacaran age to be a geological age of the Neoproterozoic, ranging from 600 to 544 million years before present. Some were determined to be pseudofossils, but others were revealed to be members of rather complex biotas that are still poorly understood. en.wikipedia.org /wiki/Neoproterozoic   (490 words)

Vendian biota - Wikipedia, the free encyclopedia The Vendian biota (also known as Ediacaran Biota, Vendian forms, Vendian fauna(s), Vendobionta or Vendozoa) are a group of ancient lifeforms that are found in rocks of the Ediacaran Period, a bit older than the Cambrian faunas that represent the oldest (shelly) fossils of classical paleontology. The Vendian "animals" (assuming that they were animals) are probably too large and complex to be single-celled, and seem to be without exception diploblastic. Many believe that some or all of the Vendians are precursors to one or more modern phyla that arose in the Cambrian. www.wikipedia.org /wiki/Vendian_Biota   (412 words)

Vendian Period The reported biota now includes probable algae, cnidarians and bilaterians – the last two largely known from fossil embryos. Although some taxa are now known to have persisted, and others may have evolved into different forms, most of the Ediacarans simply vanish from the fossil record near the beginning of the Cambrian. Confusingly, the same term is also used in a biogenic sense, and in two different ways: Many authors apply the term 'Ediacaran' to any Vendian (or Ediacaran) age macrofossil, whereas others restrict the term to the unique and distinctive assemblage of enigmatic organisms best known from the Ediacara Hills of South Australia. www.peripatus.gen.nz /Paleontology/Vendian.html   (4246 words)

sgoldberg1 First discovered over a century ago, the Ediacaran Fauna (also known as the Vendian Biota after the time period in which it flourished) still contains a host of basic but unanswerable uncertainties. To get an idea of what the Ediacaran fauna looked like, there is an excellent webpage, which I found had the best photos and easiest interface, which I invite you to look at: www.ucmp.berkeley.edu/vendian/critters.html What exactly the Ediacara were, how they are related to each other and to currently living species, and what eventually became of them are all questions still being researched and debated. www.earth.rochester.edu /ees207/Goldberg/sgoldberg1.html   (182 words)

Vendian biota - Wikipedia, the free encyclopedia The Vendian biota (also known as Ediacaran biota, Vendian forms, Vendian fauna(s), Vendobionta or Vendozoa) are a group of ancient lifeforms that are found in rocks of the Ediacaran Period, a bit older than the Cambrian faunas that represent the oldest (shelly) fossils of classical paleontology. It has been suggested that the section Ediacaran biota from the article Ediacaran be merged into this article or section. The original descriptions came from the Ediacaran faunas of South Australia. en.wikipedia.org /wiki/Vendian_biota   (452 words)

Palaeos Ecology : Biota : Marine Evolutionary Biotas The Vendian evolutionary biota includes the enigmatic Ediacaran fauna, which seems to be a combination of organisms (the so-called Vendobiota) unrelated to any living Metazoa, along with possible metazoan ancestors. The Tommotian evolutionary biota is made up of "coat of mail" animals that left behind small shelly fossils, as well as archaeocyathids and other early groups. Finally, The Modern evolutionary biota emerged in the wake of the end-Permian mass extinction, and is still rapidly diversifying. www.palaeos.com /Ecology/Biota/Marine.html   (625 words)

Palaeos Ecology : Biota : The Cambrian evolutionary biota Actually there are three distinct marine communities with at least some occurrences in the Cambrian: the Ediacaran biota, Tommotian "small shelly fauna," and the Paleozoic biota. Palaeos Ecology : Biota : The Cambrian evolutionary biota This is a brief introduction to the classic biota of the Cambrian. www.palaeos.com /Ecology/Biota/Cambrian.html   (318 words)

Ediacaran Fossils of Canada Recent fossils found in Namibia show us that members of the Ediacara Biota did populate the oceans up until the end of the Precambrian (545 million years ago). These worms, and some other members of the Ediacara Biota, survived the extinction event and took part in the greatest evolutionary event in Earth's history: The Cambrian "Explosion" of Life. With the close of the Precambrian, much of the Ediacara Biota would become extinct. geol.queensu.ca /museum/exhibits/ediac/ediac.html   (491 words)

New Scientist Breaking News - Fractal patterns of early life revealed This biota survived until 542 million years ago, when modern animals diversified rapidly in the Cambrian explosion and most Ediacaran species vanished. Until now, almost all Ediacaran fossils were squashed flat, and the few that were not were poorly preserved. This led to debate over whether the poor preservation obscured links to later life, or if the Ediacaran organisms were in fact a failed experiment in evolution that simply became extinct. www.newscientist.com /article.ns?id=dn6162   (569 words)

Paleontology and Geology Glossary: E Vendian biota (Ediacaran fauna), included soft-bodied multi-cellular animals, like sponges, cnidarians, worms, and soft-bodied relatives of the arthropods. Ediacaran fauna is the animal life that lived during the Vendian or Ediacaran period (roughly 650 to 544 million years ago). The Ediacaran period was named for the Ediacara Hills in South Australia (the word Ediacaran is of Australian Aboriginal origin and means a place where there is water). www.enchantedlearning.com /subjects/dinosaurs/glossary/indexe.shtml   (4966 words)

Palaeos Ecology: Biota: The Ediacaran Biota This section is describes the Ediacaran biota of the Vendian in some detail. Somewhat later, perhaps 590 to 565 Ma, but still predating any known Ediacaran assemblage, the Doushantuo phosphate deposit in China is slowly yielding a surprisingly diverse biota, including probable algae, sponges, cnidarians and bilaterians (read more). The Ediacaran Biota (2): their phylogeny and relationships to the Paleozoic biota www.palaeos.com /Ecology/Biota/Ediacara.html   (2556 words)

Matthew Clapham Clapham, M.E., Narbonne, G.M., Gehling, J.G., Greentree, C., and Anderson, M.M. Thectardis avalonensis: A new Ediacaran fossil from the Mistaken Point biota, Newfoundland. This research showed that Ediacaran communities possessed the same vertical tiering structure as Phanerozoic communities. The field area in the Mistaken Point Ecological Reserve includes the oldest-known Ediacaran communities, preserved as they appeared during life over 565 million years ago. earth.usc.edu /research/paleolab/matthew_clapham.htm   (805 words)

EDIACARAN FACTS AND INFORMATION The Ediacaran biotas is occasionally referred to as the Vendian_biota but this has been used more rarely in recent times. The Ediacaran biota is accepted as the earliest record of animal life by most palaeontologists). Additional fossils have been found in dozens of outcrops on all continents, and collectively these have come to be known as the Ediacaran biota. www.witwib.com /Ediacaran   (730 words)

Palaeos Ecology : Biota : The Ediacaran evolutionary biota Palaeos Ecology : Biota : The Ediacaran evolutionary biota There is little doubt that the Ediacara biotas dominated the latest Precambrian marine ecosystem, occupying a range of ecological niches and pursuing varied life strategies probably within the photic zone. Vendian Biota: general remarks, the "Garden of Ediacara" hypothesis www.palaeos.com /Ecology/Biota/Vendian.html   (406 words)

The Succession of Life in the Sea The Vendian evolutionary biota includes the enigmatic Ediacaran fauna, which seems to be a combination of organisms (the so-called Vendobiota) unrelated to any living Metazoa, along with possible metazoan ancestors. The Tommotian evolutionary biota is made up of "coat of mail" animals that left behind small shelly fossils, as well as archaeocyathids and other early groups. Finally, The Modern evolutionary biota emerged in the wake of the end-Permian mass extinction, and is still rapidly diversifying. academic.udayton.edu /MichaelSandy/succession_of_life_in_the_sea.htm   (547 words)

Precambrian - Wikipedia, the free encyclopedia These are referred to as Ediacaran or Vendian biota. A quite diverse collection of soft-bodied forms is known from a variety of locations worldwide between 542 and 600 Ma. en.wikipedia.org /wiki/Precambrian   (795 words)

Geologic Time - Enchanted Learning Software Vendian biota (Ediacaran fauna) multi-celled animals appear, including sponges. Mass extinction of trilobites and nautiloids at end of Cambrian (50% of all animal families went extinct), probably due to glaciation. The continents had merged into a single supercontinent called Rodinia. www.zoomdinosaurs.com /subjects/Geologictime.html   (583 words)

k14 Ediacaran fossils Conventional wisdom is that before the Cambrian, in the space of 20 million years, life in the oceans had changed from a rich but effectively microscopic biota derived from Ediacaran faunas. ("Ediacara fauna" or "Vendian biota") appear to be related to modern jellyfish and corals. So much so that Martin E Glaessner was inspired to call the late Precambrian the “Age of Jellyfish.” Also, judging from (purported) fossilized trails on bedding surfaces, Ediacaran faunas included mobile creatures. geowords.com /histbooknetscape/k14.htm   (1246 words)

The Fossil Record We have previously discussed the pre-Cambrian Vendian (Ediacaran) fossils which have no relationship at all with any of the later phyla found in the Cambrian layer and through no light on how they might have evolved. Over the past few years they have found strange fossils in Pre-Cambrian rock called the Vendian epoch, and these will be dealt with subsequently in this chapter. The creatures that appear suddenly in the Cambrian layer consist of very complex animals, octopi, mollusks, squid, urchin, jellyfish, trilobites (extinct), shrimp, limpets, worms, and snails to name a few. www.thedarwinpapers.com /oldsite/number5/darwin5.htm   (13992 words)

NG BBS - Post a message! : : "Since Darwin's time mysterious animals have been found in pre-Cambrian rock strata, known as the Vendian epoch, or the Ediacaran layer, and these are called 'Vendian biota' or 'Ediacara fauna' " : What craps up a lot of your "biblical" theory is that the book was written in Darwin's time, not ours. We are finding fossils from earlier periods all the time. www.newgrounds.com /bbs/post.php?pid=3534258   (248 words)

Vendian Period Keywords: Vendian, Vendian biota, fossil record, evolution, Varangian, Varanger-Marinoan, snowball earth, Ediacaran, Metazoan radiation The published age constraints on these fossils are from 595 Ma (Varangian glacial diamictites of the Gaskiers Formation) to 565 Ma (well-dated Ediacaran fossils at Mistaken Point occurring 1.5 km stratigraphically higher). An impoverished but characteristic Ediacaran assemblage occurs in the upper beds of the Drook Formation, south-eastern Newfoundland, 1500 m stratigraphically below the well-known Mistaken Point fossils; these are the oldest of the large, architecturally complex fossils found so far (Narbonne and Gehling 2003). www.peripatus.gen.nz /Paleontology/Vendian.html   (248 words)

Ediacaran Fossils of Canada Recent fossils found in Namibia show us that members of the Ediacara Biota did populate the oceans up until the end of the Precambrian (545 million years ago). These worms, and some other members of the Ediacara Biota, survived the extinction event and took part in the greatest evolutionary event in Earth's history: The Cambrian "Explosion" of Life. Since the discovery in Australia, the Ediacara Biota (named after the discovery site) has been found at more than 30 localities worldwide on every continent except Antarctica. geol.queensu.ca /museum/exhibits/ediac/ediac.html   (248 words)

Curriculum Vitae Waggoner, B. Paleobiogeography of the Late Precambrian "Ediacara biota" and the use of phylogenetic contrast analyses in biogeography. Waggoner, B. Biogeographic analyses of the Ediacara biota: a conflict with paleotectonic reconstructions. Waggoner, B. Global biogeography of Ediacaran assemblages in the Late Precambrian. faculty.uca.edu /~benw/benwcv.htm   (2210 words)

Northern Calcareous Alps To keep the artificial model simple Dickinsonia costata, a member of the Precambrian Ediacaran biota, was chosen as template for the evolution of parts of the external morphology of a fossil species. The advantages of the members of the Ediacaran biota are their relatively simple external morphology and the lack of hard parts. In the field of paleontology and computer science further applications of the herein proposed artificial evolutionary system are conceivable like investigations on phenotypic plasticity, simulating locomo-tion of extinct organisms (and therefore a possible linking of fossil traces and its originator), new ap-proaches in development and control of modular robots. www.palinst.unizh.ch /schatz/research/Dickinsonia.html   (2210 words)

Age of Animals Whatever the interpretation, it seems that the appearance of the Ediacaran fauna and the Cambrian biota are two separate events, and both flourished suddenly in a "complete state". First, there was the rise and fall of mysterious creatures of the "Vendian biota" or "Ediacara fauna" (see Figure 01a), named for the fossil site in Australia where they were first discovered. Other scientists have suggested that the Ediacaran fauna were "failed experiments" in the evolution of multicellular animals. universe-review.ca /R10-19-animals.htm   (2210 words)

CSC - Intelligent Design: The Origin of Biological Information and the Higher Taxonomic Categories Then, beginning about 570-565 million years ago (mya), the first complex multicellular organisms appeared in the rock strata, including sponges, cnidarians, and the peculiar Ediacaran biota (Grotzinger et al. The emergence of the Ediacaran biota (570 mya), and then to a much greater extent the Cambrian explosion (530 mya), represented steep climbs up the biological complexity gradient. One way to estimate the amount of new CSI that appeared with the Cambrian animals is to count the number of new cell types that emerged with them (Valentine 1995:91-93). www.discovery.org /scripts/viewDB/index.php?command=view&id=2177&progr...   (14205 words)

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