Newsletter Number 46
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
THE CLASSIFICATION and EVOLUTION of the HETEROSTRACI Since 1858, When Huxley Demonstrated That in the Histological Struc
ACTA PALAEONT OLOGICA POLONICA Vol. VII 1 9 6 2 N os. 1-2 L. BEVERLY TARLO THE CLASSIFICATION AND EVOLUTION OF THE HETEROSTRACI Abstract. - An outline classification is given of the Hetero straci, with diagnoses . of th e following orders and suborders: Astraspidiformes, Eriptychiiformes, Cya thaspidiformes (Cyathaspidida, Poraspidida, Ctenaspidida), Psammosteiformes (Tes seraspidida, Psarnmosteida) , Traquairaspidiformes, Pteraspidiformes (Pte ras pidida, Doryaspidida), Cardipeltiformes and Amphiaspidiformes (Amphiaspidida, Hiber naspidida, Eglonaspidida). It is show n that the various orders fall into four m ain evolutionary lineages ~ cyathaspid, psammosteid, pteraspid and amphiaspid, and these are traced from primitive te ssellated forms. A tentative phylogeny is pro posed and alternatives are discussed. INTRODUCTION Since 1858, when Huxley demonstrated that in the histological struc ture of their dermal bone Cephalaspis and Pteraspis were quite different from one another, it has been recognized that there were two distinct groups of ostracoderms for which Lankester (1868-70) proposed the names Osteostraci and Heterostraci respectively. Although these groups are generally considered to be related to on e another, Lankester belie ved that "the Heterostraci are at present associated with the Osteostraci because they are found in the same beds, because they have, like Cepha laspis, a large head shield, and because there is nothing else with which to associate them". In 1889, Cop e united these two groups in the Ostracodermi which, together with the modern cyclostomes, he placed in the Class Agnatha, and although this proposal was at first opposed by Traquair (1899) and Woodward (1891b), subsequent work has shown that it was correct as both the Osteostraci and the Heterostraci were agnathous. -
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 ------ - --- - - - - - --- --- - -- --- - -- - - --- -
40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor
40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor To cite this version: Jonathan Gaylor. 40Ar/39Ar Dating of the Late Cretaceous. Earth Sciences. Université Paris Sud - Paris XI, 2013. English. NNT : 2013PA112124. tel-01017165 HAL Id: tel-01017165 https://tel.archives-ouvertes.fr/tel-01017165 Submitted on 2 Jul 2014 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. Université Paris Sud 11 UFR des Sciences d’Orsay École Doctorale 534 MIPEGE, Laboratoire IDES Sciences de la Terre 40Ar/39Ar Dating of the Late Cretaceous Thèse de Doctorat Présentée et soutenue publiquement par Jonathan GAYLOR Le 11 juillet 2013 devant le jury compose de: Directeur de thèse: Xavier Quidelleur, Professeur, Université Paris Sud (France) Rapporteurs: Sarah Sherlock, Senoir Researcher, Open University (Grande-Bretagne) Bruno Galbrun, DR CNRS, Université Pierre et Marie Curie (France) Examinateurs: Klaudia Kuiper, Researcher, Vrije Universiteit Amsterdam (Pays-Bas) Maurice Pagel, Professeur, Université Paris Sud (France) - 2 - - 3 - Acknowledgements I would like to begin by thanking my supervisor Xavier Quidelleur without whom I would not have finished, with special thanks on the endless encouragement and patience, all the way through my PhD! Thank you all at GTSnext, especially to the directors Klaudia Kuiper, Jan Wijbrans and Frits Hilgen for creating such a great project. -
Upper Cretaceous Stratigraphy and Biostratigraphy of South-Central New Mexico Stephen C
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/63 Upper Cretaceous stratigraphy and biostratigraphy of south-central New Mexico Stephen C. Hook, Greg H. Mack, and William A. Cobban, 2012, pp. 413-430 in: Geology of the Warm Springs Region, Lucas, Spencer G.; McLemore, Virginia T.; Lueth, Virgil W.; Spielmann, Justin A.; Krainer, Karl, New Mexico Geological Society 63rd Annual Fall Field Conference Guidebook, 580 p. This is one of many related papers that were included in the 2012 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. -
Fossil Jawless Fish from China Foreshadows Early Jawed Vertebrate Anatomy
LETTER doi:10.1038/nature10276 Fossil jawless fish from China foreshadows early jawed vertebrate anatomy Zhikun Gai1,2, Philip C. J. Donoghue1, Min Zhu2, Philippe Janvier3 & Marco Stampanoni4,5 Most living vertebrates are jawed vertebrates (gnathostomes), and The new genus is erected for ‘Sinogaleaspis’ zhejiangensis23,24 Pan, 1986, the living jawless vertebrates (cyclostomes), hagfishes and lampreys, from the Maoshan Formation (late Llandovery epoch to early Wenlock provide scarce information about the profound reorganization of epoch, Silurian period, ,430 million years ago) of Zhejiang, China. the vertebrate skull during the evolutionary origin of jaws1–9. The Diagnosis. Small galeaspid (Supplementary Figs 6 and 7) distinct from extinct bony jawless vertebrates, or ‘ostracoderms’, are regarded as Sinogaleaspis in its terminally positioned nostril, posterior supraorbital precursors of jawed vertebrates and provide insight into this form- sensory canals not converging posteriorly, median dorsal sensory ative episode in vertebrate evolution8–14. Here, using synchrotron canals absent, only one median transverse sensory canal and six pairs radiation X-ray tomography15,16, we describe the cranial anatomy of of lateral transverse sensory canals17,23. galeaspids, a 435–370-million-year-old ‘ostracoderm’ group from Description of cranial anatomy. To elucidate the gross cranial ana- China and Vietnam17. The paired nasal sacs of galeaspids are located tomy of galeaspids, we used synchrotron radiation X-ray tomographic anterolaterally in the braincase, -
The Turonian - Coniacian Boundary in the United States Western Interior
Acta Geologica Polonica, Vol. 48 (1998), No.4, pp. 495-507 The Turonian - Coniacian boundary in the United States Western Interior IRENEUSZ WALASZCZYKI & WILLIAM A. COBBAN2 I Institute of Geology, University of Warsaw, AI. Zwirki i Wigury 93, PL-02-089 Warszawa, Poland E-mail: [email protected] 270 Estes Street, Lakewood, Colorado 80226, USA ABSTRACT: WALASZCZYK, I. & COBBAN, W.A. 1998. The Turonian - Coniacian boundary in the United States Western Interior. Acta Geologica Polonica, 48 (4),495-507. Warszawa. The Turonian/Coniacian boundary succession in the United States Western Interior is characterized by the same inoceramid faunas as recognized in Europe, allowing the application of the same zonal scheme in both regions; Mytiloides scupini and Cremnoceramus waltersdorfensis waltersdorfensis zones in the topmost Turonian and Cremnoceramus deformis erectus Zone in the lowermost Coniacian. The correla tion with Europe is enhanced, moreover, by a set of boundary events recognized originally in Europe and well represented in the Western Interior: Didymotis I Event and waltersdorfensis Event in the topmost Turonian, and erectus I, II and ?III events in the Lower Coniacian. First "Coniacian" ammonite, Forresteria peruana, appears in the indisputable Turonian, in the zone of M. scupini, and the reference to Forresteria in the boundary definition should be rejected. None of the North American sections, pro posed during the Brussels Symposium as the potential boundary stratotypes, i.e. Wagon Mound and Pueblo sections, appears better than the voted section of the Salzgitter-Salder. The Pueblo section is relatively complete but markedly condensed in comparison with the German one, but it may be used as a very convenient reference section for the Turonian/Coniacian boundary in the Western Interior. -
Paleontology and Stratigraphy of Upper Coniacianemiddle
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln USGS Staff -- Published Research US Geological Survey 2005 Paleontology and stratigraphy of upper Coniacianemiddle Santonian ammonite zones and application to erosion surfaces and marine transgressive strata in Montana and Alberta W. A. Cobban U.S. Geological Survey T. S. Dyman U.S. Geological Survey, [email protected] K. W. Porter Montana Bureau of Mines and Geology Follow this and additional works at: https://digitalcommons.unl.edu/usgsstaffpub Part of the Earth Sciences Commons Cobban, W. A.; Dyman, T. S.; and Porter, K. W., "Paleontology and stratigraphy of upper Coniacianemiddle Santonian ammonite zones and application to erosion surfaces and marine transgressive strata in Montana and Alberta" (2005). USGS Staff -- Published Research. 367. https://digitalcommons.unl.edu/usgsstaffpub/367 This Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in USGS Staff -- Published Research by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Cretaceous Research 26 (2005) 429e449 www.elsevier.com/locate/CretRes Paleontology and stratigraphy of upper Coniacianemiddle Santonian ammonite zones and application to erosion surfaces and marine transgressive strata in Montana and Alberta W.A. Cobban a,1, T.S. Dyman b,*, K.W. Porter c a US Geological Survey, Denver, CO 80225, USA b US Geological Survey, Denver, CO 80225, USA c Montana Bureau of Mines and Geology, Butte, MT 59701, USA Received 28 September 2004; accepted in revised form 17 January 2005 Available online 21 June 2005 Abstract Erosional surfaces are present in middle and upper Coniacian rocks in Montana and Alberta, and probably at the base of the middle Santonian in the Western Interior of Canada. -
Revised Sequence Stratigraphy of the Ordovician of Baltoscandia …………………………………………… 20 Druzhinina, O
Baltic Stratigraphical Association Department of Geology, Faculty of Geography and Earth Sciences, University of Latvia Natural History Museum of Latvia THE EIGHTH BALTIC STRATIGRAPHICAL CONFERENCE ABSTRACTS Edited by E. Lukševičs, Ģ. Stinkulis and J. Vasiļkova Rīga, 2011 The Eigth Baltic Stratigraphical Conference 28 August – 1 September 2011, Latvia Abstracts Edited by E. Lukševičs, Ģ. Stinkulis and J. Vasiļkova Scientific Committee: Organisers: Prof. Algimantas Grigelis (Vilnius) Baltic Stratigraphical Association Dr. Olle Hints (Tallinn) Department of Geology, University of Latvia Dr. Alexander Ivanov (St. Petersburg) Natural History Museum of Latvia Prof. Leszek Marks (Warsaw) Northern Vidzeme Geopark Prof. Tõnu Meidla (Tartu) Dr. Jonas Satkūnas (Vilnius) Prof. Valdis Segliņš (Riga) Prof. Vitālijs Zelčs (Chairman, Riga) Recommended reference to this publication Ceriņa, A. 2011. Plant macrofossil assemblages from the Eemian-Weichselian deposits of Latvia and problems of their interpretation. In: Lukševičs, E., Stinkulis, Ģ. and Vasiļkova, J. (eds). The Eighth Baltic Stratigraphical Conference. Abstracts. University of Latvia, Riga. P. 18. The Conference has special sessions of IGCP Project No 591 “The Early to Middle Palaeozoic Revolution” and IGCP Project No 596 “Climate change and biodiversity patterns in the Mid-Palaeozoic (Early Devonian to Late Carboniferous)”. See more information at http://igcl591.org. Electronic version can be downloaded at www.geo.lu.lv/8bsc Hard copies can be obtained from: Department of Geology, Faculty of Geography and Earth Sciences, University of Latvia Raiņa Boulevard 19, Riga LV-1586, Latvia E-mail: [email protected] ISBN 978-9984-45-383-5 Riga, 2011 2 Preface Baltic co-operation in regional stratigraphy is active since the foundation of the Baltic Regional Stratigraphical Commission (BRSC) in 1969 (Grigelis, this volume). -
The Nearshore Cradle of Early Vertebrate Diversification Sallan, Lauren; Friedman, Matt; Sansom, Robert; Bird, Charlotte; Sansom, Ivan
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by University of Birmingham Research Portal The nearshore cradle of early vertebrate diversification Sallan, Lauren; Friedman, Matt; Sansom, Robert; Bird, Charlotte; Sansom, Ivan DOI: 10.1126/science.aar3689 License: None: All rights reserved Document Version Peer reviewed version Citation for published version (Harvard): Sallan, L, Friedman, M, Sansom, R, Bird, C & Sansom, I 2018, 'The nearshore cradle of early vertebrate diversification', Science, vol. 362, no. 6413, pp. 460-464. https://doi.org/10.1126/science.aar3689 Link to publication on Research at Birmingham portal Publisher Rights Statement: This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on 26th October 2018. DOI: 10.1126/science.aar3689 General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. -
Annual Meeting 2011
The Palaeontological Association 55th Annual Meeting 17th–20th December 2011 Plymouth University PROGRAMME and ABSTRACTS Palaeontological Association 2 ANNUAL MEETING ANNUAL MEETING Palaeontological Association 1 The Palaeontological Association 55th Annual Meeting 17th–20th December 2011 School of Geography, Earth and Environmental Sciences, Plymouth University The programme and abstracts for the 55th Annual Meeting of the Palaeontological Association are outlined after the following summary of the meeting. Venue The meeting will take place on the campus of Plymouth University. Directions to the University and a campus map can be found at <http://www.plymouth.ac.uk/location>. The opening symposium and the main oral sessions will be held in the Sherwell Centre, located on North Hill, on the east side of campus. Accommodation Delegates need to make their own arrangements for accommodation. Plymouth has a large number of hotels, guesthouses and hostels at a variety of prices, most of which are within ~1km of the University campus (hotels with PL1 or PL4 postcodes are closest). More information on these can be found through the usual channels, and a useful starting point is the website <http://www.visitplymouth.co.uk/site/where-to-stay>. In addition, we have organised discount rates at the Jury’s Inn, Exeter Street, which is located ~500m from the conference venue. A maximum of 100 rooms have been reserved, and will be allocated on a first-come-first-served basis. Further information can be found on the Association’s website. Travel Transport into Plymouth can be achieved via a variety of means. Travel by train from London Paddington to Plymouth takes between three and four hours depending on the time of day and the number of stops. -
Devonian Jawless Vertebrates
FULL COMMUNICATIONS PALAEONTOLOGY Phylogenetic relationships of psammosteid heterostracans (Pteraspidiformes), Devonian jawless vertebrates Vadim Glinskiy PALAEONTOLOGY Institute of Earth Sciences, Saint Petersburg State University, Universitetskaya nab., 7–9, Saint Petersburg, 199034, Russian Federation Address correspondence and requests for materials to Vadim Glinskiy, [email protected] Abstract Psammosteid heterostracans are a group (suborder Psammosteoidei) of Devo- nian-age jawless vertebrates, which is included in the order Pteraspidiformes. The whole group of psammosteids is represented by numerous species (more than 40); their phylogenetic relationships are still poorly known and deserve further study. Classical researchers of the psammosteids, such as D. Obruchev, E. Mark-Kurik and L. Halstead Tarlo, had different views on the phylogeny of the group (e.g. origins and evolution of Psammosteus). To check the modern hy- potheses of psammosteid origins from various Pteraspidiformes and to clarify psammosteid interrelationships, the most complete phylogeny of this group (38 ingroup taxa + juvenile Drepanapsis) is presented here. Different methods of data analysis were used to explore the psammosteid data set, including equally weighted characters versus implied weighting. According to the results of the phylogenetic analysis, the monophyletic status of the group and their early development from the Pteraspidiformes are supported. The diagnoses and interrelationships of many taxa are clarified. Two new genera are proposed (Vladimirolepis -
How to Cite Complete Issue More Information About This
Boletín de la Sociedad Geológica Mexicana ISSN: 1405-3322 Sociedad Geológica Mexicana, A.C. Ifrim, Christina Schlueterella stinnesbecki n. sp. (Ammonoidea, Diplomoceratidae) from the Turonian-Coniacian of northeastern Mexico Boletín de la Sociedad Geológica Mexicana, vol. 71, no. 3, 2019, September-December, pp. 841-849 Sociedad Geológica Mexicana, A.C. DOI: https://doi.org/10.18268/BSGM2019v71n3a13 Available in: https://www.redalyc.org/articulo.oa?id=94366148013 How to cite Complete issue Scientific Information System Redalyc More information about this article Network of Scientific Journals from Latin America and the Caribbean, Spain and Journal's webpage in redalyc.org Portugal Project academic non-profit, developed under the open access initiative Boletín de la Sociedad Geológica Mexicana / 2019 / 841 Short note Schlueterella stinnesbecki n. sp. (Ammonoidea, Diplomoceratidae) from the Turonian–Coniacian of northeastern Mexico Christina Ifrim ABSTRACT Christina Ifrim ABSTRACT RESUMEN [email protected] Institut für Geowissenschaften, Universität Heidelberg, Im Neuenheimer Feld 234, 69120 A new species of the genus Schlueterella Se describe una nueva especie del género Heidelberg, Germany. Wiedmann, 1962 is here described. Schlueterella Wiedmann, 1962. Los veinte Twenty specimens of this hetero- ejemplares de este ammonoideo heteromorfo morph ammonoid were collected fueron colectados en el norte de Coahuila, in northern Coahuila, Mexico. México. Parece que Schlueterella stinnes- Schlueterella stinnesbecki n. sp. seems to becki n. sp. fue una especie endémica en el have been an endemic form in the Turoniano tardío–Coniaciano temprano. late Turonian–early Coniacian. This Con total certeza se trata del registro más is the oldest definite record of the antiguo de este género y una forma básica genus and a basal form in its evolu- en su evolución desde Neocrioceras.