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The Ediacaran Frondose Fossil Arborea from the Shibantan Limestone of South China
Journal of Paleontology, 94(6), 2020, p. 1034–1050 Copyright © 2020, The Paleontological Society. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/ licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. 0022-3360/20/1937-2337 doi: 10.1017/jpa.2020.43 The Ediacaran frondose fossil Arborea from the Shibantan limestone of South China Xiaopeng Wang,1,3 Ke Pang,1,4* Zhe Chen,1,4* Bin Wan,1,4 Shuhai Xiao,2 Chuanming Zhou,1,4 and Xunlai Yuan1,4,5 1State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China <[email protected]><[email protected]> <[email protected]><[email protected]><[email protected]><[email protected]> 2Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, USA <[email protected]> 3University of Science and Technology of China, Hefei 230026, China 4University of Chinese Academy of Sciences, Beijing 100049, China 5Center for Research and Education on Biological Evolution and Environment, Nanjing University, Nanjing 210023, China Abstract.—Bituminous limestone of the Ediacaran Shibantan Member of the Dengying Formation (551–539 Ma) in the Yangtze Gorges area contains a rare carbonate-hosted Ediacara-type macrofossil assemblage. This assemblage is domi- nated by the tubular fossil Wutubus Chen et al., 2014 and discoidal fossils, e.g., Hiemalora Fedonkin, 1982 and Aspidella Billings, 1872, but frondose organisms such as Charnia Ford, 1958, Rangea Gürich, 1929, and Arborea Glaessner and Wade, 1966 are also present. -
Les « Plumes » De L'édiacarien, Un Groupe Animal Disparu ?
1/7 Les « plumes » de l'Édiacarien, un groupe animal disparu ? 19/09/2018 Auteur(s) : Cyril Langlois ENS Lyon - Préparation à l'agrégation SV-STU Publié par : Olivier Dequincey Résumé Stromatoveris et autres fossiles ”édiacariens” en frondes, en plumes ou en pneu : nouvelle phylogénie basée sur une idée ancienne et l'étude comparative de nombreux spécimens récemment exhumés. Table des matières Rappel : les fossiles de l'Édiacarien Stromatoveris, l'édiacarien du Cambrien Conclusion Bibliographie Les fossiles découverts dès 1946 dans les collines d'Édiacara, en Australie, mais aussi, entre autres, en Russie et en Namibie, et datés de la fin du Protérozoïque, intriguent les paléontologues depuis plusieurs décennies. Si certains des fossiles décrits ont pu être rattachés à des groupes d'organismes déjà connus ou encore existants, d'autres restent énigmatiques. Ces derniers présentent, pour la plupart, une morphologie caractéristique en « plume » ou en « fronde » subdivisée en rameaux et branches selon une structure fractale. Leur position phylogénétique comme leur mode de vie ont fait l'objet de diverses interprétations : groupe entièrement disparu ? Sous-ensemble de Cnidaires ? Osmotrophes ? Détritivores ? Récemment, des fossiles semblables ont été exhumés dans un site chinois plus récent, daté du Cambrien, preuve que ces organismes existaient encore au début du Phanérozoïque. Par un examen approfondi de ces fossiles et de leurs homologues protérozoïque, portant sur plus de 200 spécimens, une chercheuse britannique et son collègue chinois proposent une analyse phylogénétique qui regroupe l'ensemble de ces organismes dans un unique clade monophylétique, entièrement disparu, groupe-frère de tous les autres animaux (Hoyal Cuthill et Han, 2018 [3]). -
Constructional and Functional Anatomy of Ediacaran Rangeomorphs
Geological Magazine Constructional and functional anatomy of www.cambridge.org/geo Ediacaran rangeomorphs Nicholas J Butterfield Original Article Department of Earth Sciences, University of Cambridge, Cambridge, UK CB2 3EQ Cite this article: Butterfield NJ. Constructional Abstract and functional anatomy of Ediacaran rangeomorphs. Geological Magazine https:// Ediacaran rangeomorphs were the first substantially macroscopic organisms to appear in the doi.org/10.1017/S0016756820000734 fossil record, but their underlying biology remains problematic. Although demonstrably hetero- trophic, their current interpretation as osmotrophic consumers of dissolved organic carbon Received: 28 February 2020 (DOC) is incompatible with the inertial (high Re) and advective (high Pe) fluid dynamics Revised: 15 June 2020 Accepted: 19 June 2020 accompanying macroscopic length scales. The key to resolving rangeomorph feeding and physiology lies in their underlying construction. Taphonomic analysis of three-dimensionally Keywords: preserved Charnia from the White Sea identifies the presence of large, originally water-filled Neoproterozoic; Eumetazoa; external compartments that served both as a hydrostatic exoskeleton and semi-isolated digestion cham- digestion; fluid dynamics; hydrostatic skeleton; bers capable of processing recalcitrant substrates, most likely in conjunction with a resident microbiome; taphonomy microbiome. At the same time, the hydrodynamically exposed outer surface of macroscopic Author for correspondence: Nicholas J rangeomorphs would have dramatically enhanced both gas exchange and food delivery. A Butterfield, Email: [email protected] bag-like epithelium filled with transiently circulated seawater offers an exceptionally efficient means of constructing a simple, DOC-consuming, multicellular heterotroph. Such a body plan is broadly comparable to that of anthozoan cnidarians, minus such derived features as muscle, tentacles and a centralized mouth. -
What Came Before the Cambrian Explosion
What Came Before the Cambrian? Advanced Reading The Cambrian Explosion was an era of significant evolution of animal life. What came before the Cambrian era that, in a sense, opened the door for the new body forms to evolve? The geologic era before the Cambrian was called the Ediacran, lasting from about 635 to 542 million years ago. Scientists often characterize this era as an “experimental” phase in the evolution of animals. By this time unicellular life had been around for millions of years and a mat of microbes covered parts of the seafloor. The first multicellular animals that evolved could have grazed on those microbes. The fossils from the Ediacran mostly show soft-bodied organisms. Some of these fossils look like fronds, discs and blobs, and aren’t easy to identify. Others seem to be related to Cnidarians or to be soft-bodied relatives of arthropods or perhaps Echinoderms. In addition, there are trace fossils, probably made by worm-like creatures. Many of the fossil animals remain mysterious and may represent lines of animals that no longer exist. But fossils are not the only evidence of animal life in the Ediacran. In fact the first evidence of sponges is not a body fossil but rather a biochemical fossil. When an animal dies, some of its molecules break down into a stable form that can last in rocks for millions of years just like body fossils. These are biochemical fossils. Scientists have found an Ediacran biochemical fossil of a fat molecule found today only in sponges. The name Ediacran comes from the Ediacra Hills of South Australia, the most famous location of these fossils. -
The Ediacaran Frondose Fossil Arborea from the Shibantan Limestone of South China
Journal of Paleontology, 94(6), 2020, p. 1034–1050 Copyright © 2020, The Paleontological Society. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/ licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. 0022-3360/20/1937-2337 doi: 10.1017/jpa.2020.43 The Ediacaran frondose fossil Arborea from the Shibantan limestone of South China Xiaopeng Wang,1,3 Ke Pang,1,4* Zhe Chen,1,4* Bin Wan,1,4 Shuhai Xiao,2 Chuanming Zhou,1,4 and Xunlai Yuan1,4,5 1State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing 210008, China <[email protected]><[email protected]> <[email protected]><[email protected]><[email protected]><[email protected]> 2Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, USA <[email protected]> 3University of Science and Technology of China, Hefei 230026, China 4University of Chinese Academy of Sciences, Beijing 100049, China 5Center for Research and Education on Biological Evolution and Environment, Nanjing University, Nanjing 210023, China Abstract.—Bituminous limestone of the Ediacaran Shibantan Member of the Dengying Formation (551–539 Ma) in the Yangtze Gorges area contains a rare carbonate-hosted Ediacara-type macrofossil assemblage. This assemblage is domi- nated by the tubular fossil Wutubus Chen et al., 2014 and discoidal fossils, e.g., Hiemalora Fedonkin, 1982 and Aspidella Billings, 1872, but frondose organisms such as Charnia Ford, 1958, Rangea Gürich, 1929, and Arborea Glaessner and Wade, 1966 are also present. -
Charnwood Forest
Charnwood Forest: A Living Landscape An integrated wildlife and geological conservation implementation plan March 2009 Cover photograph: Warren Hills, Charnwood Lodge Nature Reserve (Michael Jeeves) 2 Charnwood Forest: A Living Landscape Contents Page 1. Executive summary 5 2. Introduction 8 3. A summary of the geological/geomorphological interest 13 4. Historical ecology since the Devensian glaciation 18 5. The main wildlife habitats 21 6. Overall evaluation 32 7. Summary of changes since the 1975 report 40 8. Review of recommendations in the 1975 report 42 9. Current threats 45 10. Existing nature conservation initiatives 47 11. New long-term objectives for nature conservation in Charnwood Forest 51 12. Action plan 54 13. Acknowledgements 56 14. References 57 Appendix – Gazeteer of key sites of ecological importance in Charnwood Forest Figures: 1. Charnwood Forest boundaries 2. Sites of Special Scientific Interest 3. Map showing SSSIs and Local Wildlife Site distribution 4. Tabulation of main geological formations and events in Charnwood 5. Regionally Important Geological Sites 6. Woodlands in order of vascular plant species-richness 7. Moth species-richness 8. Key sites for spiders 9. Key sites for dragonflies and damselflies 10. Evaluation of nature conservation features 11. Invertebrate Broad Assemblage Types in Charnwood listed by ISIS 12a Important ISIS Specific Assemblage Types in Charnwood Forest 3 12b Important habitat resources for invertebrates 12c Important sites for wood-decay invertebrate assemblages 12d Important sites for flowing water invertebrate assemblages 12e Important sites for permanent wet mire invertebrate assemblages 12f Important sites for other invertebrate assemblage types 13. Evaluation of species groups 14. Leicestershire Red Data Book plants 15. -
The Early History of the Metazoa—A Paleontologist's Viewpoint
ISSN 20790864, Biology Bulletin Reviews, 2015, Vol. 5, No. 5, pp. 415–461. © Pleiades Publishing, Ltd., 2015. Original Russian Text © A.Yu. Zhuravlev, 2014, published in Zhurnal Obshchei Biologii, 2014, Vol. 75, No. 6, pp. 411–465. The Early History of the Metazoa—a Paleontologist’s Viewpoint A. Yu. Zhuravlev Geological Institute, Russian Academy of Sciences, per. Pyzhevsky 7, Moscow, 7119017 Russia email: [email protected] Received January 21, 2014 Abstract—Successful molecular biology, which led to the revision of fundamental views on the relationships and evolutionary pathways of major groups (“phyla”) of multicellular animals, has been much more appre ciated by paleontologists than by zoologists. This is not surprising, because it is the fossil record that provides evidence for the hypotheses of molecular biology. The fossil record suggests that the different “phyla” now united in the Ecdysozoa, which comprises arthropods, onychophorans, tardigrades, priapulids, and nemato morphs, include a number of transitional forms that became extinct in the early Palaeozoic. The morphology of these organisms agrees entirely with that of the hypothetical ancestral forms reconstructed based on onto genetic studies. No intermediates, even tentative ones, between arthropods and annelids are found in the fos sil record. The study of the earliest Deuterostomia, the only branch of the Bilateria agreed on by all biological disciplines, gives insight into their early evolutionary history, suggesting the existence of motile bilaterally symmetrical forms at the dawn of chordates, hemichordates, and echinoderms. Interpretation of the early history of the Lophotrochozoa is even more difficult because, in contrast to other bilaterians, their oldest fos sils are preserved only as mineralized skeletons. -
Guide to the Geology of Bradgate Park and Swithland Wood, Charnwood Forest
British Geological Survey Keyworth Nottingham NG12 5GG BGS Occasional Report: OR/10/041 GUIDE TO THE GEOLOGY OF BRADGATE PARK AND SWITHLAND WOOD, CHARNWOOD FOREST J N Carney Including a provisional itinerary and details of localities Old John Tower, with south- dipping strata of the Beacon Hill Formation in the f oreground Bibliographic reference: Carney, J N, 2010. Guide to the geology of Bradgate Park and Swithland Wood, Charnwood Forest. British Geological Survey Occasional Report, 0R/10/041. Geology data, British Geological Survey © NERC PROVISIONAL ITINERARY AND NOTES Gather at Bradgate Park, Hunt’s Hill entrance (SK 5232 1167) CONTENTS A. Introduction and geological background Mode of origin of the Charnian Supergroup Charnwood Forest as a ‘young’ mountain range B. Locality descriptions 1. Beacon Hill Formation, Old John Tower 2. Bradgate Formation: Sliding Stone Slump Breccia 2a. Bradgate Formation, above Sliding Stone Breccia 3. Swithland Formation in Swithland Wood 4. Hanging Rocks Formation 5. Bradgate Formation, Coppice Plantation 6. South Charnwood Diorite, Bradgate House 7. Brand Hills Formation, Stable Pit 8. Triassic exposure, Pheasantry The fossil site References Figures (at back of this guide) 1. Geology of Charnwood Forest 2. Geological map of Bradgate Park and localities to be visited 3. Subduction zone model for Charnian magma generation 4. a) Position of England & Wales 600 million years ago b) Position of UK about 420 million years ago 5 The Soufriere Hills volcano, Montserrat 6. Cross-section through a Charnian volcano 7. Principal features of the ‘sag’ structure 8. Structural synthesis of the ‘sag’ 9. Selected Precambrian fossils from Charnwood Forest 2 Note: Due to recent vandalism and attempted theft of in situ fossils, by person(s) unknown, a protocol was established between the BGS and the Bradgate Park Trust. -
The Palaeontology Newsletter
The Palaeontology Newsletter Contents100 Editorial 2 Association Business 3 Annual Meeting 2019 3 Awards and Prizes AGM 2018 12 PalAss YouTube Ambassador sought 24 Association Meetings 25 News 30 From our correspondents A Palaeontologist Abroad 40 Behind the Scenes: Yorkshire Museum 44 She married a dinosaur 47 Spotlight on Diversity 52 Future meetings of other bodies 55 Meeting Reports 62 Obituary: Ralph E. Chapman 67 Grant Reports 72 Book Reviews 104 Palaeontology vol. 62 parts 1 & 2 108–109 Papers in Palaeontology vol. 5 part 1 110 Reminder: The deadline for copy for Issue no. 101 is 3rd June 2019. On the Web: <http://www.palass.org/> ISSN: 0954-9900 Newsletter 100 2 Editorial This 100th issue continues to put the “new” in Newsletter. Jo Hellawell writes about our new President Charles Wellman, and new Publicity Officer Susannah Lydon gives us her first news column. New award winners are announced, including the first ever PalAss Exceptional Lecturer (Stephan Lautenschlager). (Get your bids for Stephan’s services in now; check out pages 34 and 107.) There are also adverts – courtesy of Lucy McCobb – looking for the face of the Association’s new YouTube channel as well as a call for postgraduate volunteers to join the Association’s outreach efforts. But of course palaeontology would not be the same without the old. Behind the Scenes at the Museum returns with Sarah King’s piece on The Yorkshire Museum (York, UK). Norman MacLeod provides a comprehensive obituary of Ralph Chapman, and this issue’s palaeontologists abroad (Rebecca Bennion, Nicolás Campione and Paige dePolo) give their accounts of life in Belgium, Australia and the UK, respectively. -
The Advent of Animals: the View from the Ediacaran SPECIAL FEATURE
The advent of animals: The view from the Ediacaran SPECIAL FEATURE Mary L. Drosera,1 and James G. Gehlingb,c aDepartment of Earth Sciences, University of California, Riverside, CA 92521; bSouth Australia Museum, Adelaide, SA 5000, Australia; and cUniversity of Adelaide, Adelaide, SA 5000, Australia Edited by Neil H. Shubin, The University of Chicago, Chicago, IL, and approved December 9, 2014 (received for review April 15, 2014) Patterns of origination and evolution of early complex life on this relationships within the Ediacara Biota and, importantly, reveals the planet are largely interpreted from the fossils of the Precam- morphologic disparity of these taxa. brian soft-bodied Ediacara Biota. These fossils occur globally and However, although fossils of the Ediacara Biota are not easily represent a diverse suite of organisms living in marine environments. classified with modern taxa, they nonetheless provide the record Although these exceptionally preserved fossil assemblages are typi- of early animals. One of the primary issues is that they are soft- cally difficult to reconcile with modern phyla, examination of the bodied and preserved in a manner that is, in many cases, unique to morphology, ecology, and taphonomy of these taxa provides keys to the Ediacaran. An alternative venue for providing insight into these their relationships with modern taxa. Within the more than 30 million organisms and the manner in which they fit into early animal evo- y range of the Ediacara Biota, fossils of these multicellular organisms lution is offered by examination of the paleoecology, morphology, demonstrate the advent of mobility, heterotrophy by multicellular and taphonomy of fossils of the Ediacara Biota. -
Cnidaria: Hydrozoa) Or Eldonids from the Early Cambrian (Series 2: Stage 4) of Western U.S.A
A peer-reviewed version of this preprint was published in PeerJ on 6 June 2017. View the peer-reviewed version (peerj.com/articles/3312), which is the preferred citable publication unless you specifically need to cite this preprint. Lieberman BS, Kurkewicz R, Shinogle H, Kimmig J, MacGabhann BA. 2017. Disc-shaped fossils resembling porpitids or eldonids from the early Cambrian (Series 2: Stage 4) of western USA. PeerJ 5:e3312 https://doi.org/10.7717/peerj.3312 Disc-shaped fossils resembling porpitids (Cnidaria: Hydrozoa) or eldonids from the early Cambrian (Series 2: Stage 4) of western U.S.A. Bruce S Lieberman Corresp., 1, 2 , Richard Kurkewicz 3 , Heather Shinogle 4 , Julien Kimmig 2 , Breandán Anraoi MacGabhann 5 1 Department of Ecology & Evolutionary Biology, University of Kansas, Lawrence, Kansas, United States 2 Biodiversity Institute, University of Kansas, Lawrence, Kansas, United States 3 Pangaea Fossils, San Francisco, California, United States 4 Microscopy and Analytical Imaging Laboratory, University of Kansas, Lawrence, Kansas, United States 5 Department of Geography, Edge Hill University, Ormskirk, United Kingdom Corresponding Author: Bruce S Lieberman Email address: [email protected] The morphology and affinities of newly discovered disc-shaped soft-bodied fossils from the early Cambrian (Series 2: Stage 4, Dyeran) Carrara Formation are discussed. These specimens show some similarity to the Ordovician Discophyllum Hall, 1847; traditionally this taxon had been treated as a fossil porpitid. However, recently it has instead been referred to another clade, the eldonids, which includes the enigmatic Eldonia Walcott, 1911 that was originally described from the Cambrian Burgess Shale. The status of various Proterozoic and Phanerozoic taxa previously referred to porpitids and eldonids is also briefly considered. -
A Stem-Group Cnidarian Described from the Mid-Cambrian of China and Its Significance for Cnidarian Evolution
ARTICLE Received 11 May 2011 | Accepted 26 Jul 2011 | Published 23 Aug 2011 DOI: 10.1038/ncomms1457 A stem-group cnidarian described from the mid-Cambrian of China and its significance for cnidarian evolution Tae-yoon Park1, Jusun Woo2, Dong-Jin Lee3, Dong-Chan Lee4, Seung-bae Lee1, Zuozhen Han5, Sung Kwun Chough1 & Duck K. Choi1 Palaeontological data of extinct groups often sheds light on the evolutionary sequences leading to extant groups, but has failed to resolve the basal metazoan phylogeny including the origin of the Cnidaria. Here we report the occurrence of a stem-group cnidarian, Cambroctoconus orientalis gen. et sp. nov., from the mid-Cambrian of China, which is a colonial organism with calcareous octagonal conical cup-shaped skeletons. It bears cnidarian features including longitudinal septa arranged in octoradial symmetry and colonial occurrence, but lacks a jelly- like mesenchyme. Such morphological characteristics suggest that the colonial occurrence with polyps of octoradial symmetry is the plesiomorphic condition of the Cnidaria and appeared earlier than the jelly-like mesenchyme during the course of evolution. 1 School of Earth and Environmental Sciences, Seoul National University, Seoul 151-747, Korea. 2 Division of Polar Earth System Science, Korea Polar Research Institute, Incheon 406-840, Korea. 3 Department of Earth and Environmental Sciences, Andong National University, Andong 760-749, Korea. 4 Department of Heritage Studies, Daejeon Health Sciences College, Daejeon 300-711, Korea. 5 College of Geo-information Science and Technology, Shandong University of Science and Technology, Shandong 266510, China. Correspondence and requests for materials should be addressed to D.K.C. (email: [email protected]).