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Showing results for tags 'Ediacaran'.
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Oldest Known Trackway (Late Ediacaran ) South China ???
Oxytropidoceras posted a topic in Fossil News
These Are the Oldest Known Footprints on the Planet By George Dvorsky, Gizmodo, June 7, 2018 https://gizmodo.com/these-are-the-oldest-known-footprints-on-the-planet-1826648702 When did animals leave their first footprint on Earth? Chinese Academy of Sciences, June 6, 2018, Press Release https://www.eurekalert.org/pub_releases/2018-06/caos-wda060518.php The paper is: Zhe Chen, Xiang Chen, Chuanming Zhou, Xunlai Yuan, and Shuhai Xiao, 2018, Late Ediacaran trackways produced by bilaterian animals with paired appendages Science Advances 06 Jun 2018: Vol. 4, no. 6, eaao6691 DOI: 10.1126/sciadv.aao6691 http://advances.sciencemag.org/content/4/6/eaao6691 Yours, Paul H.- 2 replies
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This question just crossed my mind today, seemingly without provocation: What are the oldest known coprolites in the fossil record, whether from vertebrates or invertebrates? I know of Paleozoic coprolites, but is there any evidence of coprolites before that, perhaps from the Ediacaran? And if there are no pre-Cambrian coprolites recorded, what are the oldest known from the Paleozoic? I have a feeling that @GeschWhat might know a thing or two about this subject since, after all, she is the official Queen of Poopiness on TFF.
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Princeton geologists solve fossil mystery by creating 3-D ‘virtual tour’ through rock, Prnceton University https://www.princeton.edu/news/2018/02/27/princeton-geologists-solve-fossil-mystery-creating-3-d-virtual-tour-through-rock Princeton geologists solve fossil mystery by creating 3-D ‘virtual tour’ through rock, Brinkware, March 1, 2018 http://en.brinkwire.com/179755/princeton-geologists-solve-fossil-mystery-by-creating-3-d-virtual-tour-through-rock/ The paper is: Mehra, A., and Maloof, A., 2018, Multiscale approach reveals that Cloudina aggregates are detritus and not in situ reef constructions. PNAS 2018; published ahead of print February 26, 2018, https://doi.org/10.1073/pnas.1719911115 http://www.pnas.org/content/early/2018/02/21/1719911115 Yours, Paul H.
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From the album: Invertebrates
Tirasiana coniformis Palij, 1976 Ediacaran Karachiivtsi Ukraine -
Ediacaran Palaeopascichnus delicatus Palij, 1976
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Palaeopascichnus delicatus Palij, 1976 Ediacaran Mohyliv-Podilskyi Group Mohylev Formation Bernashivka Ukraine From Wikipedia: Palaeopascichnus is a genus of Ediacaran organism comprising a series of lobes; it is plausibly a protozoan, but probably unrelated to the classical 'Ediacaran biota'. Lit.: ANTCLIFFE, J., GOODAY A. and BRASIER, M.: TESTING THE PROTOZOAN HYPOTHESIS FOR EDIACARAN FOSSILS: A DEVELOPMENTAL ANALYSIS OF PALAEOPASCICHNUS. Palaeontology, Vol. 54, Part 5, 2011, pp . 1157–1175 -
Ediacaran Namacalathus hermanastes Grotzinger et al., 2000
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Namacalathus hermanastes Grotzinger et al., 2000 Ediacaran Nama Group Kuibis Quarzit Fish River Canyon Namibia Lit.: Zhuravlev AY, Wood RA, Penny AM. 2015 Ediacaran skeletal metazoan interpreted as a lophophorate. Proc. R. Soc. B 282 : 20151860. http://dx.doi.org/10.1098/rspb.2015.1860-
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From the album: Invertebrates
Cyclomedusa davidi Sprigg, 1947 Upper Ediacaran Mohylev formation Yampil beds Bernashivka Ukraine Diameter ~ 9cm / 4" -
From the album: Invertebrates
Tirasiana coniformis Palij, 1976 Ediacaran Karachiivtsi Ukraine -
Wendel, J. (2017), Hunting rare fossils of the Ediacaran, Eos, 98, https://doi.org/10.1029/2017EO086601. Published on 13 November 2017. https://eos.org/features/hunting-rare-fossils-of-the-ediacaran https://eos.org/current-issues “The search for fossil imprints and casts of squishy organisms takes time, perseverance, and sometimes a sprinkle of luck.” Smith, E.F., Nelson, L.L., Tweedt, S.M., Zeng, H. and Workman, J.B., 2017, July. A cosmopolitan late Ediacaran biotic assemblage: new fossils from Nevada and Namibia support a global biostratigraphic link. In Proceedings of the Royal Society B (Vol. 284, No. 1858, p. 20170934). https://www.researchgate.net/publication/318379716_A_cosmopolitan_late_Ediacaran_biotic_assemblage_new_fossils_from_Nevada_and_Namibia_support_a_global_biostratigraphic_link https://www.researchgate.net/profile/Emily_Smith52 http://rspb.royalsocietypublishing.org/content/284/1858/20170934 A related paper is: E.F. Smith L.L. Nelson M.A. Strange A.E. Eyster S.M. Rowland D.P. Schrag F.A. Macdonald, 2016, The end of the Ediacaran: Two new exceptionally preserved body fossil assemblages from Mount Dunfee, Nevada, USA Geology 44 (11):911-914. DOI: https://doi.org/10.1130/G38157.1 https://static1.squarespace.com/static/53cedb86e4b0710434ee1ff4/t/57fee4eef5e231fadeb000ee/1476322543557/Smith_2016_Geology_Dunfee.pdf https://pubs.geoscienceworld.org/geology/article/44/11/911/195087/the-end-of-the-ediacaran-two-new-exceptionally Yours, Paul H.
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Hi all, well this is the second drawing Ive ever made in my life other than stick figures. I consider my last post a total failure (trilobite) so Im trying another subject material. Since the last post, Ive watched a few hours of You tube videos on how to do basic drawings, and hopefully that made a difference. This one took me on and off - about two days to do. So what do you think - Fauna or Flub?
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A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
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Until recently classified as a jellyfish, Medusina mawsoni is now considered to be the trace where a holdfast where a rangeomorph such as Rangea was connected to the substrate as in Charniodiscus being the base of Charnia. This specimen is thus about 555 million years old and is from the Rawnsley Quartzite.
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From the album: Adam's Cambrian
This is a rangeomorph holdfast from the Ediacaran of the Flinder's Range in Australia. It is labeled as Medusinites mawsoni, as it was believed to have belonged to a jellyfish, but this is now not considered to be true, and is likely similar to Charniodiscus in being the holdfast for a member of the Vendobionta, probably a fractal rangeomorph like Charnia. This is therefore Precambrian in age, somewhere between 550 to 560 million years old or so.-
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Been some good invertebrate articles out there lately..... https://phys.org/news/2017-09-mysterious-ancient-creature-animal.html
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550 Ma Brazilian Trace Fossils from Bilaterian Animals
Oxytropidoceras posted a topic in Fossil News
Half-a-billion-year-old fossils shed light animal evolution on earth, University of Manchester, September 11, 2017 http://www.manchester.ac.uk/discover/news/half-a-billion-year-old-fossils-shed-new-light-on-animal-evolution/ https://phys.org/news/2017-09-half-a-billion-year-old-fossils-animal-evolution-earth.html https://www.sciencedaily.com/releases/2017/09/170911122628.htm Tha paper is: Parry, L. A., P. C. Boggiani, D. J. Condon, and others, 2017, Ichnological evidence for meiofaunal bilaterians from the terminal Ediacaran and earliest Cambrian of Brazil Nature Ecology & Evolution. doi:10.1038/s41559-017-0301-9 https://www.researchgate.net/publication/319109419_Ichnological_evidence_for_meiofaunal_bilaterians_from_the_terminal_Ediacaran_and_earliest_Cambrian_of_Brazil https://www.nature.com/articles/s41559-017-0301-9 Lidya G. Tarhan, 2017, Meiofauna mute the Cambrian Explosion News and Views, Nature Ecology & Evolution https://www.nature.com/articles/s41559-017-0324-2 Yours, Paul H.- 2 replies
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From the album: Invertebrates
Kimberella quadrata Wade, 1972 Ediacaran Onega Island Arkhangelsk White sea region Russia Dorsal view according Micha L. Rieser (copyright holder, Wikipedia) a: striae b: crenellated zone c: proximal ridge d: distal ridge e: anterior knoll f: lobe g: medial depressionor or midline ridge -
From the album: Invertebrates
Dickinsonia costata Sprigg, 1947 Ediacaran White Sea region, Zimnie Gory Arkhangelsk Russia- 1 comment
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Cyclomedusa davidi Sprigg, 1947 together with Nemiana simplex Palij, 1976
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Cyclomedusa davidi Sprigg, 1947 together with Nemiana simplex Palij, 1976 Upper Ediacaran Mohylev formation Yampil beds Bernashivka Ukraine Diameter ~ 9cm / 4" -
Five places that mark Australia's extreme geological past By Dr. Tom Raimondo, ABC Science, July 22, 2017 http://www.abc.net.au/news/science/2017-07-22/five-places-that-mark-australias-extreme-geological-past/8728928 Also, the Australian government released enormous amount of sea floor mapping and other geologic data, which was generated by the MH370 tragedy, to the public. MH370 Search Data Published Reveals Ocean Geology, Shipwrecks and Fishing Grounds, ABC News, July 19, 2017 http://www.nbcnews.com/storyline/missing-jet/mh370-search-data-published-reveals-ocean-geology-shipwrecks-fishing-grounds-n784281 MH370 - Phase One Data Release http://marine.projects.ga.gov.au/mh370-phase-one-data-release.html "The search for MH370 involved the collection and analysis of large volumes of marine data from a remote area. The data obtained during the first phase of sea floor mapping is now available to the public." Yours, Paul H.
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Excavations for Ediacaran biota at Nilpena Station Continues
Oxytropidoceras posted a topic in Fossil News
A Family of Explorers in Search of Some of Earth’s Oldest Fossils by Emily Hughes, National Geographic, June 28, 2017 http://voices.nationalgeographic.com/2017/06/28/a-family-of-explorers-in-search-of-some-of-earths-oldest-fossils/ Dr. Mary Droser, University of California, Riverside http://earthscience.ucr.edu/droser.html Mary Droser studies ediacara fossils, August 2 2013 http://www.abc.net.au/news/2013-08-02/mary-droser-studies-ediacara-fossils/4862498 Yours, Paul H. -
Highly Regulated Growth of Dickinsonia costata (Ediacaran Biota)
Oxytropidoceras posted a topic in Fossil News
Shedding light on Earth's first animals. Complex and highly regulated development of Dickinsonia, one of the oldest fossil animals, broadens our understanding of early evolution https://www.sciencedaily.com/releases/2017/05/170517154731.htm https://ucrtoday.ucr.edu/47122 Scott D. Evans, Mary L. Droser, James G. Gehling. Highly regulated growth and development of the Ediacara macrofossil Dickinsonia costata. Plos One, 2017 DOI: 10.1371/journal.pone.0176874 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0176874 http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0176874&type=printable Yours, Paul H.- 1 reply
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Paleoecology of Ediacaran Biota (Parvancorina) Reevaluated
Oxytropidoceras posted a topic in Fossil News
Life in the Precambrian may have been much livelier than previously thought Vanderbilt University, May 19, 2017 https://www.sciencedaily.com/releases/2017/05/170519084411.htm https://news.vanderbilt.edu/2017/05/18/life-precambrian-livelier/ "The strange creatures that lived in the Garden of the Ediacaran more than 540 million years ago, before animals came on the scene, may have been much more dynamic than experts have thought." The paper is: Darroch, S., A. F., I. A. Rahman, B. Gibson, R. A. Racicot, and M. Laflamme, 2017, Inference of facultative mobility in the enigmatic Ediacaran organism Parvancorina. Biology Letters, 2017; 13 (5): 20170033 DOI: 10.1098/rsbl.2017.0033 http://rsbl.royalsocietypublishing.org/content/13/5/20170033 Yours, Paul H. -
Conotubus--An Endearing Ediacaran Critter: My Latest New Favorite Fossil
Virgilian posted a topic in General Fossil Discussion
Conotubus--my new latest favorite fossil. It's an Ediacaran (latest Neoproterozoic--AKA, Precambrian) tubular critter of unestablished zoological affinity (educated guesses include an annelid--specifically some kind of tube worm--or possibly a sea anemone-like animal). And it's been recovered from only two localities on Earth: southern Shaanxi Province, South China; and at one lone site in Nevada. Conotubus shows superficial similarity to the well known Ediacaran tube-type specimen Cloudina, but lacks a mineralized skeleton. Conotubus apparently secreted a tubular home enclosure composed of chitinous material. Image from HERE. Above, two views of the same pyritized (replaced at least partially by pyrite--an iron disulfide, of course, commonly called "fool's gold") Conotubus from the upper Precambrian Esmeralda Member of the upper Precambrian-lower Cambrian Deep Spring Formation, Nevada, where Conotubus occurs several feet below the first appearance of the ichnofossil Trepichnus pedum, which presently helps define (along with geochemical evidence-- a sudden, dramatic negative excursion of a specific carbon isotope) the worldwide base of the Cambrian Period, the transition from Ediacaran times to the earliest moments of the Paleozoic Era. Photograph is a Google Image grab, by the way. Image from HERE. Examples of pyritized Conotubus hemiannulatus from the Ediacaran, late Neoproterozoic Gaojiashan Lagerstätte of southern Shaanxi Province, South China. Photograph is a Google Image grab, by the way. -
Spriggina chosen as South Australia’s fossil emblem Jade Gailberger, Environment reporter, Courier Mail February 14, 2017 http://www.couriermail.com.au/news/national/spriggina-chosen-as-south-australias-fossil-emblem/news-story/b15c8d115af55caef859e16568e37282 Flinders Ranges fossils documented as part of World Heritage listing bid, Nicola Gage Australian Broadcasting Corporation. http://www.abc.net.au/news/2017-02-12/flinders-ranges-world-heritage-listing-bid/8262494 Trace fossils: the ancient history of SA’s outback In Daily, Australia, Alice Gorman, February 8, 2016 http://indaily.com.au/news/science-and-tech/2017/02/08/trace-fossils-the-ancient-history-of-sas-outback/ Yours, Paul H.
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I acquired my first Ediacaran fossil recently, a little slab of Intrites punctatus from the Burway Formation in Shropshire, England. I've found scant information about these organisms, though. From what little I've seen, these appear to be impressions in the rock with such impressions being all that have ever been found from the species. What is the latest knowledge on them? Definite taxonomy? Has anything other than discoid impressions been found? The Ediacaran can be so murky.
