Bibliography of Yves Candela
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Sequence of Post-Moult Exoskeleton Hardening Preserved in a Trilobite Mass Moult Assemblage from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco
Editors' choice Sequence of post-moult exoskeleton hardening preserved in a trilobite mass moult assemblage from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco HARRIET B. DRAGE, THIJS R.A. VANDENBROUCKE, PETER VAN ROY, and ALLISON C. DALEY Drage, H.B., Vandenbroucke, T.R.A., Van Roy, P., and Daley, A.C. 2019. Sequence of post-moult exoskeleton hardening preserved in a trilobite mass moult assemblage from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco. Acta Palaeontologica Polonica 64 (2): 261–273. Euarthropods have a tough exoskeleton that provides crucial protection from predation and parasitism. However, this is restrictive to growth and must be periodically moulted. The moulting sequence is well-known from extant arthropods, consisting of: (i) the long inter-moult stage, in which no changes occur to the hardened exoskeleton; (ii) the pre-moult stage where the old exoskeleton is detached and the new one secreted; (iii) exuviation, when the old exoskeleton is moulted; and (iv) the post-moult stage during which the new exoskeleton starts as soft, thin, and partially compressed and gradually hardens to the robust exoskeleton of the inter-moult stage. Trilobite fossils typically consist of inter-moult carcasses or moulted exuviae, but specimens preserving the post-moult stage are rare. Here we describe nine specimens assigned to Symphysurus ebbestadi representing the first group of contemporaneous fossils collected that preserve all key stages of the moulting process in one taxon, including the post-moult stage. They were collected from a single lens in the Tremadocian part of the Fezouata Shale Formation, Morocco. Based on cephalic displacement and comparison to other trilobite moults, one specimen appears to represent a moulted exoskeleton. -
Plumulitid Machaeridian Remains from the Silurian (Telychian) of Severnaya Zemlya, Arctic Russia
NORWEGIAN JOURNAL OF GEOLOGY Plumulitid mochoeridion remains from the Silurion, Arctic Russio 53 Plumulitid machaeridian remains from the Silurian (Telychian) of Severnaya Zemlya, Arctic Russia Anette E.S. Hogstrom, Olga K. Bogolepova & Alexander P. Gubanov Hogstrom, A.E.S., Bogolepova, O.K. and Gubanov, A.P.: Plumulitid machaeridian remains from the Silurian (Telychian) of Sevemaya Zemlya, Arc tic Russia. Norsk Geologisk Tidsskrift, Vol. 82, pp. 53-55. Trondheim 2002, ISSN 029-196X. The machaeridian genus Plumulites is reported for the first time from the Severnaya ZemlyaArchipelago of Arctic Russia, where it occurs in limes tone concretions within the Sredninskaya Formation. Graptolites fromthe same concretions indicate the late crispus- griestoniensisBiozones of the mid Telychian (Uandovery). Similarities to plumulitid sclerites from the Upper Ordovician of the Tairnyr Peninsula promotes further interest in machaeridian faunas fromthis region. A.E.S. Hogstromi, O.K. Bogolepova and A.P. Gubanov, Historical Geology & Palaeontology, Dept. of Earth Sciences, Uppsala University, Norbyviigen 22, SE-752 36, Uppsala, Sweden. I Temporaryaddress: Dept. of Earth Sciences, Wills Memorial Building, Queen's Road, Bristol BSB l RJ, UK. lntroduction Stratigraphy and locality The global record of Silurian machaeridians is limited, Machaeridians discussed herein originate from the but includes rare articulated specimens, and more com Lower Silurian Sredninskaya Formation (Matukhin et monly isolated sclerites that have been found in Britain al. 1999). To avoid nomenclatural questions, it should (de Koninck 1857; Woodward 1865; Withers 1926 and be noted that these rocks were previously referred to as Adrain et al. 1991), the Baltic Region (Aurivillius 1892; the Golomaynnaya Formation (Menner et al. -
Contributions in BIOLOGY and GEOLOGY
MILWAUKEE PUBLIC MUSEUM Contributions In BIOLOGY and GEOLOGY Number 51 November 29, 1982 A Compendium of Fossil Marine Families J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions in BIOLOGY and GEOLOGY Number 51 November 29, 1982 A COMPENDIUM OF FOSSIL MARINE FAMILIES J. JOHN SEPKOSKI, JR. Department of the Geophysical Sciences University of Chicago REVIEWERS FOR THIS PUBLICATION: Robert Gernant, University of Wisconsin-Milwaukee David M. Raup, Field Museum of Natural History Frederick R. Schram, San Diego Natural History Museum Peter M. Sheehan, Milwaukee Public Museum ISBN 0-893260-081-9 Milwaukee Public Museum Press Published by the Order of the Board of Trustees CONTENTS Abstract ---- ---------- -- - ----------------------- 2 Introduction -- --- -- ------ - - - ------- - ----------- - - - 2 Compendium ----------------------------- -- ------ 6 Protozoa ----- - ------- - - - -- -- - -------- - ------ - 6 Porifera------------- --- ---------------------- 9 Archaeocyatha -- - ------ - ------ - - -- ---------- - - - - 14 Coelenterata -- - -- --- -- - - -- - - - - -- - -- - -- - - -- -- - -- 17 Platyhelminthes - - -- - - - -- - - -- - -- - -- - -- -- --- - - - - - - 24 Rhynchocoela - ---- - - - - ---- --- ---- - - ----------- - 24 Priapulida ------ ---- - - - - -- - - -- - ------ - -- ------ 24 Nematoda - -- - --- --- -- - -- --- - -- --- ---- -- - - -- -- 24 Mollusca ------------- --- --------------- ------ 24 Sipunculida ---------- --- ------------ ---- -- --- - 46 Echiurida ------ - --- - - - - - --- --- - -- --- - -- - - --- -
Exceptional Fossils from the Lower Ordovician of Morocco
Geophysical Research Abstracts, Vol. 10, EGU2008-A-10080, 2008 SRef-ID: 1607-7962/gra/EGU2008-A-10080 EGU General Assembly 2008 © Author(s) 2008 Exceptional fossils from the Lower Ordovician of Morocco Peter Van Roy (1) & Bertrand Lefebvre (2) (1) UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland, (2) UMR CNRS 5125 PEPS, Université Lyon 1, France In recent years, the Lower Ordovician deposits to the north of Zagora, southeastern Morocco have been shown to represent an important source of exceptionally pre- served fossils. Exceptional preservation in the area is not limited to discrete strati- graphic levels, but rather occurs in spatially limited "Konservat-Lagerstätten pockets" which are distributed from the top of the Lower Fezouata Formation (upper Tremado- cian) throughout the entire Upper Fezouata Formation (lower - upper Floian). Ex- ceptional fossils recovered from the area so far include Burgess Shale-type sponges, palaeoscolecids and other vermiform organisms and various unmineralised arthropods including marrellomorphs and cheloniellids. The most celebrated fossil to be col- lected from the area to date, however, is that of the first machaeridian with preserved soft tissues, providing unequivocal proof of the annelid affinities of the Machaeridia. Co-occurring classical skeletal fossils indicate that the assemblages represent normal, open marine biotas. These Early Ordovician biotas are of particular interest because they document the onset of the Great Ordovician Biodiversification Event and the resulting transition from the Cambrian Evolutionary Fauna to the Palaeozoic Evolu- tionary Fauna. So far, this major evolutionary radiation has been studied almost exclu- sively on the basis of skeletal fossils alone.. -
Ordovician Stratigraphy and Benthic Community Replacements in the Eastern Anti-Atlas, Morocco J
Ordovician stratigraphy and benthic community replacements in the eastern Anti-Atlas, Morocco J. Javier Alvaro, Mohammed Benharref, Jacques Destombes, Juan Carlos Gutiérrez-Marco, Aaron Hunter, Bertrand Lefebvre, Peter van Roy, Samuel Zamora To cite this version: J. Javier Alvaro, Mohammed Benharref, Jacques Destombes, Juan Carlos Gutiérrez-Marco, Aaron Hunter, et al.. Ordovician stratigraphy and benthic community replacements in the eastern Anti- Atlas, Morocco. The Great Ordovician Biodiversification Event: Insights from the Tafilalt Biota, Morocco, 485, The Geological Society of London, pp.SP485.20, In press, Geological Society, London, Special Publication, 10.1144/SP485.20. hal-02405970 HAL Id: hal-02405970 https://hal.archives-ouvertes.fr/hal-02405970 Submitted on 13 Nov 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. The Geological Society Special Publications Ordovician stratigraphy and benthic community replacements in the eastern Anti-Atlas, Morocco --Manuscript Draft-- Manuscript Number: GSLSpecPub2019-17R1 Article Type: Research article Full Title: Ordovician stratigraphy and benthic community replacements in the eastern Anti-Atlas, Morocco Short Title: Ordovician stratigraphy of the Anti-Atlas Corresponding Author: Javier Alvaro Instituto de Geociencias SPAIN Corresponding Author E-Mail: [email protected] Other Authors: MOHAMMED BENHARREF JACQUES DESTOMBES JUAN CARLOS GUTIÉRREZ-MARCO AARON W. -
The Upper Ordovician Glaciation in Sw Libya – a Subsurface Perspective
J.C. Gutiérrez-Marco, I. Rábano and D. García-Bellido (eds.), Ordovician of the World. Cuadernos del Museo Geominero, 14. Instituto Geológico y Minero de España, Madrid. ISBN 978-84-7840-857-3 © Instituto Geológico y Minero de España 2011 ICE IN THE SAHARA: THE UPPER ORDOVICIAN GLACIATION IN SW LIBYA – A SUBSURFACE PERSPECTIVE N.D. McDougall1 and R. Gruenwald2 1 Repsol Exploración, Paseo de la Castellana 280, 28046 Madrid, Spain. [email protected] 2 REMSA, Dhat El-Imad Complex, Tower 3, Floor 9, Tripoli, Libya. Keywords: Ordovician, Libya, glaciation, Mamuniyat, Melaz Shugran, Hirnantian. INTRODUCTION An Upper Ordovician glacial episode is widely recognized as a significant event in the geological history of the Lower Paleozoic. This is especially so in the case of the Saharan Platform where Upper Ordovician sediments are well developed and represent a major target for hydrocarbon exploration. This paper is a brief summary of the results of fieldwork, in outcrops across SW Libya, together with the analysis of cores, hundreds of well logs (including many high quality image logs) and seismic lines focused on the uppermost Ordovician of the Murzuq Basin. STRATIGRAPHIC FRAMEWORK The uppermost Ordovician section is the youngest of three major sequences recognized widely across the entire Saharan Platform: Sequence CO1: Unconformably overlies the Precambrian or Infracambrian basement. It comprises the possible Upper Cambrian to Lowermost Ordovician Hassaouna Formation. Sequence CO2: Truncates CO1 along a low angle, Type II unconformity. It comprises the laterally extensive and distinctive Lower Ordovician (Tremadocian-Floian?) Achebayat Formation overlain, along a probable transgressive surface of erosion, by interbedded burrowed sandstones, cross-bedded channel-fill sandstones and mudstones of Middle Ordovician age (Dapingian-Sandbian), known as the Hawaz Formation, and interpreted as shallow-marine sediments deposited within a megaestuary or gulf. -
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. -
The Fezouata Shale (Lower Ordovician, Anti-Atlas, Morocco): a Historical Review
Palaeogeography, Palaeoclimatology, Palaeoecology 460 (2016) 7–23 Contents lists available at ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo The Fezouata Shale (Lower Ordovician, Anti-Atlas, Morocco): A historical review Bertrand Lefebvre a,⁎, Khadija El Hariri b, Rudy Lerosey-Aubril c,ThomasServaisd,PeterVanRoye,f a UMR CNRS 5276 LGLTPE, Université Lyon 1, bâtiment Géode, 2 rue Raphaël Dubois, 69622 Villeurbanne cedex, France b Département des Sciences de la Terre, Faculté des Sciences et Techniques-Guéliz, Université Cadi Ayyad, avenue Abdelkrim el Khattabi, BP 549, 40000 Marrakesh, Morocco c Division of Earth Sciences, School of Environmental and Rural Sciences, University of New England, Armidale, NSW 2351, Australia d CNRS, Université de Lille - Sciences et Technologies, UMR 8198 Evo-Eco-Paleo, F-59655 Villeneuve d'Ascq, France e Department of Geology and Geophysics, Yale University, P.O. Box 208109, New Haven, CT 06520, USA f Department of Geology and Soil Science, Ghent University, Krijgslaan 281/S8, B-9000 Ghent, Belgium article info abstract Article history: Exceptionally preserved fossils yield crucial information about the evolution of Life on Earth. The Fezouata Biota Received 30 September 2015 from the Lower Ordovician of Morocco is a Konservat-Lagerstätte of major importance, and it is today considered Accepted 29 October 2015 as an ‘Ordovician Burgess Shale.’ This biota was discovered only some 15 years ago, but geological studies of the Available online 10 November 2015 area date back to the beginning of the 20th century. Pioneering geological investigations lead to the discovery of Ordovician strata in the Anti-Atlas (1929) and ultimately resulted in their formal subdivision into four main strat- Keywords: igraphic units (1942). -
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BRANCHES ITS ALL IN HISTORY WALES NATURAL SOUTH PROCEEDINGS of the of NEW 139 VOLUME LINNEAN SOCIETY VOL. 139 DECEMBER 2017 PROCEEDINGS OF THE LINNEAN SOCIETY OF N.S.W. (Dakin, 1914) (Branchiopoda: Anostraca: (Dakin, 1914) (Branchiopoda: from south-eastern Australia from south-eastern Octopus Branchinella occidentalis , sp. nov.: A new species of A , sp. nov.: NTES FO V I E R X E X D L E C OF C Early Devonian conodonts from the southern Thomson Orogen and northern Lachlan Orogen in north-western Early Devonian conodonts from the southern New South Wales. Pickett. I.G. Percival and J.W. Zhen, R. Hegarty, Y.Y. Australia Wales, Silurian brachiopods from the Bredbo area north of Cooma, New South D.L. Strusz D.R. Mitchell and A. Reid. D.R. Mitchell and Thamnocephalidae). Timms. D.C. Rogers and B.V. Wales. Precis of Palaeozoic palaeontology in the southern tablelands region of New South Zhen. Y.Y. I.G. Percival and Octopus kapalae Predator morphology and behaviour in C THE C WALES A C NEW SOUTH D SOCIETY S LINNEAN O I M N R T G E CONTENTS Volume 139 Volume 31 December 2017 in 2017, compiled published Papers http://escholarship.library.usyd.edu.au/journals/index.php/LIN at Published eScholarship) at online published were papers individual (date PROCEEDINGS OF THE LINNEAN SOCIETY OF NSW OF PROCEEDINGS 139 VOLUME 69-83 85-106 9-56 57-67 Volume 139 Volume 2017 Compiled 31 December OF CONTENTS TABLE 1-8 THE LINNEAN SOCIETY OF NEW SOUTH WALES ISSN 1839-7263 B E Founded 1874 & N R E F E A Incorporated 1884 D C N T U O The society exists to promote the cultivation and O R F study of the science of natural history in all branches. -
Miller, Hugh Edinburgh
THE GEOLOGICAL CURATOR VOLUME 10, NO. 7 HUGH MILLER CONTENTS EDITORIAL by Matthew Parkes ............................................................................................................................ 284 THE MUSEUMS OF A LOCAL, NATIONAL AND SUPRANATIONAL HERO: HUGH MILLER’S COLLECTIONS OVER THE DECADES by M.A. Taylor and L.I. Anderson .................................................................................................. 285 Volume 10 Number 7 THE APPEAL CIRCULAR FOR THE PURCHASE OF HUGH MILLER'S COLLECTION, 1858 by M.A. Taylor and L.I. Anderson .................................................................................................. 369 GUIDE TO THE HUGH MILLER COLLECTION IN THE ROYAL SCOTTISH MUSEUM, EDINBURGH, c. 1920 by Benjamin N. Peach, Ramsay H. Traquair, Michael A. Taylor and Lyall I. Anderson .................... 375 THE FIRST KNOWN STEREOPHOTOGRAPHS OF HUGH MILLER'S COTTAGE AND THE BUILDING OF THE HUGH MILLER MONUMENT, CROMARTY, 1859 by M. A. Taylor and A. D. Morrison-Low ..................................................................................... 429 J.G. GOODCHILD'S GUIDE TO THE GEOLOGICAL COLLECTIONS IN THE HUGH MILLER COTTAGE, CROMARTY OF 1902 by J.G. Goodchild, M.A. Taylor and L.I. Anderson ........................................................................ 447 HUGH MILLER AND THE GRAVESTONE, 1843-4 by Sara Stevenson ............................................................................................................................ 455 HUGH MILLER GEOLOGICAL CURATORS’ -
Sepkoski, J.J. 1992. Compendium of Fossil Marine Animal Families
MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. Department of the Geophysical Sciences University of Chicago Chicago, Illinois 60637 Milwaukee Public Museum Contributions in Biology and Geology Rodney Watkins, Editor (Reviewer for this paper was P.M. Sheehan) This publication is priced at $25.00 and may be obtained by writing to the Museum Gift Shop, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Orders must also include $3.00 for shipping and handling ($4.00 for foreign destinations) and must be accompanied by money order or check drawn on U.S. bank. Money orders or checks should be made payable to the Milwaukee Public Museum. Wisconsin residents please add 5% sales tax. In addition, a diskette in ASCII format (DOS) containing the data in this publication is priced at $25.00. Diskettes should be ordered from the Geology Section, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Specify 3Y. inch or 5Y. inch diskette size when ordering. Checks or money orders for diskettes should be made payable to "GeologySection, Milwaukee Public Museum," and fees for shipping and handling included as stated above. Profits support the research effort of the GeologySection. ISBN 0-89326-168-8 ©1992Milwaukee Public Museum Sponsored by Milwaukee County Contents Abstract ....... 1 Introduction.. ... 2 Stratigraphic codes. 8 The Compendium 14 Actinopoda. -
Ordovician) ‘Baksteenkalk’: an Erratic Silicified Limestone of Baltic Origin from the Northeastern Netherlands and Adjacent Areas of Germany
Estonian Journal of Earth Sciences, 2017, 66, 4, 198–219 https://doi.org/10.3176/earth.2017.18 Typology and fossil assemblage of Sandbian (Ordovician) ‘baksteenkalk’: an erratic silicified limestone of Baltic origin from the northeastern Netherlands and adjacent areas of Germany Percy van Keulena and Freek Rhebergenb a Kennedylaan 36, NL-3844 BD Harderwijk, the Netherlands; [email protected] b Slenerbrink 178, NL-7812 HJ Emmen, the Netherlands; [email protected] Received 24 May 2017, accepted 6 September 2017, available online 7 November 2017 Abstract. This study seeks to describe ‘baksteenkalk’, an erratic silicified bioclastic carbonate of the Upper Sandbian from the eastern part of the Netherlands. To date, baksteenkalk has received little attention among palaeontologists. This is to be regretted on two grounds. First, baksteenkalk contains a varied fossil flora and fauna comprising many species, several of which are not or only rarely found in coeval rocks. Second, owing to a complicated silicification process, fossils, in particular algae, have preserved exceptional anatomical details. The primary aim of this study is to arouse the interest of professional, in particular, Estonian, palaeontologists in baksteenkalk. Based on lithology and fossil assemblage (most conspicuously, with regard to the algal flora), two basic types of baksteenkalk are distinguished. A list of species, differentiated for both types, is provided. It is argued that baksteenkalk reflects the ecology of a shallow, subtropical, epicontinental sea. The distribution of erratics, facies and fossil content point to an origin within the North Estonian Confacies Belt, probably west of Estonia. Baksteenkalk survived as an erratic because it was already silicified at its place of origin.