DOCSLIB.ORG

First Occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
First Occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil 6(2):56-62, jul/dez 2010 © Copyright 2010 by Unisinos - doi: 10.4013/gaea.2010.62.01 First occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil Sara Nascimento, Valesca Brasil Lemos Universidade Federal do Rio Grande do Sul. Av. Bento Gonçalves, 9500, Prédio 43.127, sala 211, 91501-470, Porto Alegre, RS, Brasil. [email protected], [email protected] Ana Karina Scomazzon Universidade Federal de Pelotas. Rua Domingos Rodrigues, 2, 96010-440, Pelotas, RS, Brasil. [email protected] Nilo Siguehiko Matsuda PETROBRAS/E&P-EXP/GEO/ES. Av. Chile, 330, Edifício Ventura, 13º andar, 20031-170, Rio de Janeiro, RJ, Brasil. [email protected] Cristiane Pakulski da Silva Universidade Federal do Rio Grande do Sul. Av. Bento Gonçalves, 9500. Prédio 43.127, sala 211, 91501-470, Porto Alegre, RS, Brasil. [email protected] ABSTRACT This paper analyzes and describes a fi rst occurrence of the conodonts Ellisonia, Gondolella and Ubinates in Amazonas Basin, North of Brazil. The recovered material comes from two outcrops along the Tapajos River and from a limestone quarry of Itaituba Formation, whose levels are in- cluded in the Itaituba Formation, with a Pennsylvanian age. Those conodonts are relevant paleoecological indicators of water depth, salinity and environmental energy and have implications in the Late Carboniferous to Triassic biostratigraphy. The fossil remains represent M and S conodont elements, associated to Pa elements of the Idiognathodus, Idiognathoides, Neognathodus, Adetognathus, Hindeodus and Diplognathodus genus. Key words: conodonts, Amazonas Basin, Itaituba Formation, Pennsylvanian. RESUMO PRIMEIRA OCORRÊNCIA DOS GÊNEROS ELLISONIA, GONDOLELLA E UBINATES (CONODONTS) PARA A FORMAÇÃO ITAITUBA, PENSILVANIANO DA BACIA DO AMAZONAS, BRASIL. Formas inéditas de conodontes dos gêneros Ellisonia, Gondolella e Ubinates são descritas para a Bacia do Amazonas, Brasil. O material amostrado é proveniente de dois afl oramentos junto ao Rio Tapajós e de uma pedreira de calcário, cujos níveis foram atribuídos à Formação Itaituba, Pensilvaniano da Bacia do Amazonas. As formas de conodontes descritas são indicadores paleoambientais de profundidade da lâmina de água, salinidade e energia do ambiente e apresentam relevância bioestratigráfi ca mundial, principalmente entre o fi nal do Carbonífero e Triássico. No material analisado, esses conodontes são representados por elementos M e S, associados a elementos plataformados dos gêneros Idiognathodus, Idiognathoides, Neognathodus, Adetognathus, Hindeodus e Diplognathodus. Palavras-chave: conodontes, Bacia do Amazonas, Formação Itaituba, pensilvaniano. INTRODUCTION Paraná sedimentary basins. However, its The first reference to conodonts main fossil occurrence is that registered in Brazil and Itaituba Formation was The record of conodonts in Brazil in the Pennsylvanian marine deposits due to Fúlfaro (1965). Since then is known from the Paleozoic strata of from the Itaituba Formation, Tapajós conodonts have proven relevant for Amazonas, Solimões, Parnaíba, Acre and Group, at Amazonas Basin. biostratigraphic and paleoecologic Sara Nascimento, Valesca Brasil Lemos, Ana Karina Scomazzon, Luciane Profs Moutinho, Nilo Siguehiko Matsuda, Cristiane Pakulski da Silva studies, as noted by Lemos and Medeiros Tapajós Group (Caputo, 1984). SISTEMATIC PALEONTOLOGY (1996), Silva and Lemos (1996), The Itaituba Formation, estimated Lemos and Scomazzon (2001), Nasci- by conodonts an Atokan – early Order CONODONTOPHORIDA mento et al. (2005) and Scomazzon and Desmoinesian age, includes mainly Eichenberg, 1930 Lemos (2005). carbonates and evaporites with Family ELLISONIDAE Clark, 1972 The Itaituba Formation includes the intercalated clastic deposits from Genus Ellisonia Müller, 1956 thickest carbonate packages among the tidal environments. Tapajós Group, and the most abundant in The study area is situated in the Ellisonia conflexa von Bitter and conodonts. The conodont genera found latitude 04°16’34’’, longitude 55°59’ Merrill, 1983 there commonly include Idiognathodus, and comprises a limestone quarry (Figure 3A-3C) Idiognathoides, Neognathodus, Adetognathus, (P2) owned by ITACIMPASA Cement Hindeodus, Diplognathodus, Idioprioniodus Industry - located forty kilometers Material. One Sc element. and, in recent addition to those, the from the city of Itaituba and two Description. Sc element with herein presented Ellisonia, Gondolella outcrops along the Tapajós River prominent central cusp and pronounced and Ubinates. These associations are (TAPCX and TAPTV), at the southern curve, presenting spaces between cusp useful to the correlations with North portion of the Amazonas Basin, Pará and nearest denticle. There are six American Pennsylvanian strata, mainly State, northern Brazil (Figure 2). denticles varying in size, some curved, and in the Midcontinent Region. In this others straight, following the curvature paper it is furnished a first description MATERIAL of the Sc element. Shallow, elongated, of Ellisonia, Gondolella and Ubinates sinuous basal cavity, having a strongly conodont genera in these deposits Twenty five kilograms of sed- marked groove. Ellisonia conflexa retains from Brazil. imentary rock, consisting mainly of most of its processes and denticula, carbonates and shales, were processed besides presenting a well preserved basal LOCATION AND GEOLOGY using about 300g per each sample, cavity, relatively shallow and non-everted. and in accordance to Austin’s (1987) The external structure of the element The intracratonic Amazonas Basin methodology. is similar to that of the neurodont (Figure 1) has an area of 600.000 km², Ellisonia were recovered at TAPTV, conodonts (von Bitter and Merrill, 1983). with sedimentary deposition from TAPCX and P2. Ubinates and Gondolella Cambrian to Tertiary forming a 6000 were found at P2 (Table 1). The total Ellisonia latilaminata von m thick sedimentary package. The of twelve elements studied herein is Bitter and Merrill, 1983 Carboniferous-Permian sedimentary deposited at the Paleontology and (Figure 3D-3F) rocks, approximately 2000 m thick, Stratigraphy Department of the relate to the trans-regressive marine Geosciences Institute (UFRGS) under Material. Seven specimens of S and continental deposits of the acronym MP. elements. Figure 1. Location map of Amazonas Basin. The star indicates the studied area. Modified from Scomazzon (2004). Gaea - Journal of Geoscience, vol. 6, n. 2, jul/dez 2010, p. 56-62. 57 First occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil Figure 2. Stratigraphic section of the analyzed profile to the Itaituba Formation, located at south Pará State, Amazonas Basin, including TAPCX, TAPTV and P2 outcrop sections. 58 Sara Nascimento, Valesca Brasil Lemos, Ana Karina Scomazzon, Luciane Profs Moutinho, Nilo Siguehiko Matsuda, Cristiane Pakulski da Silva Table 1. Conodonts distribution in TAPTV, TAPCX and P2 studied outcrops. Samples / conodonts Ellisonia la laminata Ellisonia confl exa Ubinates sp. Gondolella sp. P2C53 1 P2C25 1 1 1 P2 P2C24 1 P2C9 1 P2C2 1 TAPCX3.4 3 TAPTV4 1 1 Description. Extremely curved strength of its processes, the larger spaces Order CONODONTOPHORIDA central cusp and everted basal cavity, with between denticula and specific details in Eichenberg, 1930 remains of a large denticle besides the the basal cavity, since the Idioprioniodus Family GONDOLELLIDAE cuspid. It was not possible to determine basal cavity is never everted. Lindstrom, 1970 whether it is a Sc or a Sa element, In the architecture of their skeletal due to its poor state of preservation. apparatuses, species of Ellisonia are Genus Gondolella Stauffer Ellisonia latilaminata does not present similar to those species of Idioprioniodus, and Plummer, 1932 well preserved processes or denticules, from which they almost certainly Gondolella sp. having however everted portions of its developed (Sweet, 1988). (Figure 3G-3J) basal cavity, which were helpful to its In North America Ellisonia spp. classification. are most common in shallow-water Material. Two M elements. Discussion. Ellisonia was established biofacies. Von Bitter and Merrill Description. M element with carina by Müller (1956) based on bilaterally (1985) provided two contrasting and denticles well developed. Cuspid symmetrical conodont elements from depositional hypotheses (one shallow, elongated and forwarded curved. Carina the Early Triassic of the Meekoceras another deep) for Idioprioniodus. Thus, thin and well developed. Zone, Nevada. Sweet (1970a, 1970b) in Illinois, Merrill (1980) interpreted Discussion. Gondolella was defined reconstituted the apparatus of the type Idioprioniodus and Gondolella to be by Stauffer and Plummer (1932) and species E. triassica and included four shallow water species, whereas it is known from Pennsylvanian to types of elements in the apparatus of von Bitter (1976) working further Triassic. This genus is the most restrict this species. Pennsylvanian species of west in Kansas interpreted them of Pennsylvanian, despite the fact that Ellisonia are internally and externally to be deep water species. In the it normally occurs in abundance of similar to the neurodont conodonts, Ames Member (Conemaugh Group, elements, it is absent in the majority a group that was common during the Virgilian) in the Huntington area of of world stratigraphic profiles. In Ordovician (von Bitter and Merrill, West Virginia, the greatest number general it is
Load more

Recommended publications
  • Orta Toroslar'da Konodont Biy Ostratigrafisi(1 )
    Türkiye Jeoloji Kurumu Bülteni, e. 20, 35-48, Şubat 1977 Bulîetin of the Geölogical Boclety of Turkey, v. 20, 35-48, February 1977 Orta Toroslar'da konodont biy ostratigrafisi(1 ) Conodontbiostratigra/phy in the Middle Taurus ÎSMET GEDİK Jeoloji Bölümü, Karadeniz Teknik Üniversitesi, Trabzon ÖZ: Çalışılan bölgede, Kambriyen-Triyas arasına ait konodont faunası saptanmış ve kısaca tanıtılmıştır. Metamorfik Alan- ya Masifinin bir nap şeklinde Sedre Triyas'mm üzerine geldiği ve bunun da bir tektonik pencere olarak görüldüğü görü- şüne varılmıştır. Hadimopanella oezgueli n. gen. n. sp. (incertae sedis) ve üç yeni konodont türü bulunmuştur. ABSTRACT: in the area studied Cambrian to Triassie systems are distinguished by the use of conodonts and their fauna is deseribed briefly. it is believed that the metamorphic Alanya massif overlays the Sedre Triassie as a nappe, forming a teetonic window. Hadimopanella oezgueli n. gen. n. sp. (İncertae sedis) and three new conodont speeies are established. (1) Bu yazı Türkiye Jeoloji Kurumu 30. Bilimsel Kurultayında bildiri olarak sunulmuştur. 36 GEDÎK GİRİŞ ve Monod, 1970). İçlerinde bazı trilobit lanmasmdon oluşan ve kalınlığı 1000 m parçalarına rastlanmıştır. Üste doğru kil yi aşan Seydişehir Formasyonuna geçti- Bu çalışma, özellikle son 20 yılda oranı gittikçe artarak, yaklaşık 50 m ği görülür. Bu formasyonun ilk 50 m lik büyük stratigrafik önem kazanan ve ge- kalınlığındaki kırmızımsı - morumsu, alt düzeylerinde bulunan kireçtaşı mer- niş çapta jeolojik formasyonların korre- yumrulu kireçtaşlarına geçilir. Bu dü- ceklerinden elde eddlen lasyonunda kullanılan konodontlardan zey içinde bol olarak Conocoryphe, Oneotodus tenu4s yararlanarak, ülkemizin bir bölgesinin Öoryneocochus, vb. gibi Orta Kambriyen stratigrafisini biraz daha aydınlığa ka- Fumishina furnishi yaşındaki tribolitlere ve akrotretid bra- Hertzima bisulcata vuşturmak ve dolayısiyle jeolojik yapısı- kiyopodlara rastlanılmıştır.
    [Show full text]
  • CONODONT BIOSTRATIGRAPHY and ... -.: Palaeontologia Polonica
    CONODONT BIOSTRATIGRAPHY AND PALEOECOLOGY OF THE PERTH LIMESTONE MEMBER, STAUNTON FORMATION (PENNSYLVANIAN) OF THE ILLINOIS BASIN, U.S.A. CARl B. REXROAD. lEWIS M. BROWN. JOE DEVERA. and REBECCA J. SUMAN Rexroad , c.. Brown . L.. Devera, 1.. and Suman, R. 1998. Conodont biostrati graph y and paleoec ology of the Perth Limestone Member. Staunt on Form ation (Pennsy lvanian) of the Illinois Basin. U.S.A. Ill: H. Szaniawski (ed .), Proceedings of the Sixth European Conodont Symposium (ECOS VI). - Palaeont ologia Polonica, 58 . 247-259. Th e Perth Limestone Member of the Staunton Formation in the southeastern part of the Illinois Basin co nsists ofargill aceous limestone s that are in a facies relati on ship with shales and sandstones that commonly are ca lcareous and fossiliferous. Th e Perth conodo nts are do minated by Idiognathodus incurvus. Hindeodus minutus and Neognathodu s bothrops eac h comprises slightly less than 10% of the fauna. Th e other spec ies are minor consti­ tuents. The Perth is ass igned to the Neog nathodus bothrops- N. bassleri Sub zon e of the N. bothrops Zo ne. but we were unable to co nfirm its assignment to earliest Desmoin esian as oppose d to latest Atokan. Co nodo nt biofacies associations of the Perth refle ct a shallow near- shore marine environment of generally low to moderate energy. but locali zed areas are more variable. particul ar ly in regard to salinity. K e y w o r d s : Co nodo nta. biozonation. paleoecology. Desmoinesian , Penn sylvanian. Illinois Basin. U.S.A.
    [Show full text]
  • 03-Alekseev and Goreva (Neognathodus).P65
    Lucas, S.G., et al. eds., 2013, The Carboniferous-Permian Transition. New Mexico Museum of Natural History and Science, Bulletin 60. 1 THE CONODONT NEOGNATHODUS BOTHROPS MERRILL, 1972 AS THE MARKER FOR THE LOWER BOUNDARY OF THE MOSCOVIAN STAGE (MIDDLE PENNSYLVANIAN) ALEXANDER S. ALEKSEEV1 AND NATALIA V. GOREVA 2 1 Department of Paleontology, Geological Faculty, Moscow State University, Russia, email: aaleks@geol. msu.ru; 2 Geological institute of Russian Academy of Science, Moscow, Russia, email: [email protected] Abstract—The Moscovian Stage constitutes the Middle Pennsylvanian Series of the Carboniferous System, but a biostratigraphic marker and GSSP for it have not yet been designated. The exact position of the Moscovian boundary cannot be defined properly because in the type area the basal Vereian unconformably overlies the Mississippian limestone or the alluvial and lagoonal Aza Formation of the uppermost Bashkirian. The Task Group to establish a GSSP close to the existing Bashkirian-Moscovian boundary suggested several potential markers among foraminifers and conodonts, but the search for a marker near traditional base of the global Moscovian Stage has stalled. It may be more productive to search for FADs in the lower Moscovian, above the traditional base, to designate the lower boundary of the stage. Relatively rich Vereian and Kashirian conodont assemblages have been recovered from the southwest Moscow Basin, as well as from the Oka-Tsna Swell. The most complete information on the distribution of conodonts in the Vereian- Kashirian boundary interval was obtained from the Yambirno section (Oka-Tsna Swell). The greatest change in conodont assemblages does not occur near the level of the traditional base of the Moscovian, but stratigraphically higher.
    [Show full text]
  • Catalog of Type Specimens of Invertebrate Fossils: Cono- Donta
    % {I V 0> % rF h y Catalog of Type Specimens Compiled Frederick J. Collier of Invertebrate Fossils: Conodonta SMITHSONIAN CONTRIBUTIONS TO PALEOBIOLOGY NUMBER 9 SERIAL PUBLICATIONS OF THE SMITHSONIAN INSTITUTION The emphasis upon publications as a means of diffusing knowledge was expressed by the first Secretary of the Smithsonian Institution. In his formal plan for the Insti­ tution, Joseph Henry articulated a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This keynote of basic research has been adhered to over the years in the issuance of thousands of titles in serial publications under the Smithsonian imprint, com­ mencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: Smithsonian Annals of Flight Smithsonian Contributions to Anthropology Smithsonian Contributions to Astrophysics Smithsonian Contributions to Botany Smithsonian Contributions to the Earth Sciences Smithsonian Contributions to Paleobiology Smithsonian Contributions to Zoology Smithsonian Studies in History and Technology In these series, the Institution publishes original articles and monographs dealing with the research and collections of its several museums and offices and of profes­ sional colleagues at other institutions of learning. These papers report newly acquired facts, synoptic interpretations of data, or original theory in specialized fields. These publications are distributed by mailing lists to libraries, laboratories, and other in­ terested institutions and specialists throughout the world. Individual copies may be obtained from the Smithsonian Institution Press as long as stocks are available.
    [Show full text]
  • Sequence Biostratigraphy of Carboniferous-Permian Boundary
    Brigham Young University BYU ScholarsArchive Theses and Dissertations 2019-07-01 Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Brigham Young University Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Physical Sciences and Mathematics Commons BYU ScholarsArchive Citation Meibos, Joshua Kerst, "Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin" (2019). Theses and Dissertations. 7583. https://scholarsarchive.byu.edu/etd/7583 This Thesis is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science Scott M. Ritter, Chair Brooks B. Britt Sam Hudson Department of Geological Sciences Brigham Young University Copyright © 2019 Joshua Kerst Meibos All Rights Reserved ABSTRACT Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Department of Geological Sciences, BYU Master of Science The stratal architecture of the upper Ely Limestone and Mormon Gap Formation (Pennsylvanian-early Permian) in western Utah reflects the interaction of icehouse sea-level change and tectonic activity in the distal Antler-Sonoma foreland basin.
    [Show full text]
  • VOLUME 33 December 2017
    VOLUME 33 December 2017 Volume 33 Table of Contents EXECUTIVE’S COLUMN…………………………………………………………………..…….. 2 OBITUARY……………………………………………………………………………………..…5 SCCS REPORTS………………………………………………………………………………….7 ANNUAL REPORT TO ICS FOR 2016-2017…………………………………………………..….7 TASK GROUP REPORTS FOR 2016-2017 AND WORK PLANS FOR 2017 FISCAL YEAR………….11 Report of the task group to establish a GSSP close to the existing Viséan-Serpukhovian boundary…………11 Report of the task group to establish a GSSP close to the existing Bashkirian-Moscovian boundary………16 Report of the task group to establish the Moscovian-Kasimovian and Kasimovian-Gzhelian boundaries…....18 SCCS DOCUMENTS (CONTRIBUTIONS BY MEMBERS)…………………………………...……21 SHALLOW-WATER SIPHONODELLIDS AND DEFINITION OF THE DEVONIAN-CARBONIFEROUS BOUNDARY…………………………………………………………………………………….21 REPORT FOR PROGRESS FOR 2017 ACTIVITIES IN THE CANTABRIAN MOUNTAINS, SPAIN AND THE AMAZONAS BASIN, BRAZIL……………………………………………...………………26 TAXONOMIC AND STRATIGRAPHIC PROBLEMS CONCERNING THE CONODONTS LOCHRIEA SENCKENBERGICA NEMIROVSKAYA, PERRET & MEISCHNER, 1994 AND LOCHRIEA ZIEGLERI NEMIROVSKAYA, PERRET & MEISHCNER, 1994-CONSEQUENCES FOR DEFINING THE VISÉAN- SERPUKHOVIAN BOUNDARY………………………………………………………………………………...28 PROGRESS ON THE VISÉAN-SERPUKHOVIAN BOUNDARY IN SOUTH CHINA AND GERMANY……………………………………………………………………………………..35 POTENTIAL FOR A MORE PRECISE CORRELATION OF THE BASHKIRIAN AMMONOID AND FORAMINIFERAL ZONES IN THE SOUTH URALS…………………………………………..……42 CHEMOMETRICS AND CARBONIFEROUS MEDULLOSALEAN FRONDS: IMPLICATIONS FOR CARBONIFEROUS PHYTOSTRATIGRAPHY…………………………………………………...…45
    [Show full text]
  • Proceedings of the Indiana Academy of Science 83
    Proceedings of the Indiana Academy of Science 83 (1993) Volume 102 p. 83-91 CONODONTS FROM COAL BALLS IN THE SPRINGFIELD COAL MEMBER OF THE PETERSBURG FORMATION (DESMOINESIAN, PENNSYLVANIAN) IN SOUTHERN INDIANA Carl B. Rexroad Indiana Geological Survey 611 North Walnut Grove Bloomington, Indiana 47405 ABSTRACT: A well-preserved and moderately diverse conodont faunule was recovered from five coal balls in the Springfield Coal Member of the Petersburg Formation from Peabody Coal Com- pany's Eby Pit, Lynnville Mine, in Warrick County, Indiana. The presence of Neognathodus roundyi and the other species recorded in this study is compatible with the middle Desmoinesian age of the Springfield. Idioprioniodus conjunctus is the most ecologically diagnostic of the conodonts and suggests organic-rich, quiet water with a low pH, which in turn suggests that the conodonts lived in a salt-water marsh bordered on one side by coal swamps and on another by near-normal marine waters. Apparently coal balls had multiple origins, and the origin of the conodont-bearing ones is uncertain. INTRODUCTION Because marine fossils are commonly associated with plant fossils in some coal balls, it is not surprising that conodonts have been reported from them. A half-dozen well-pre- served conodonts from Pennsylvanian coal balls from three different States were figured by Mamay and Yochelson (1962), but no other conodonts were figured; therefore, the overall conodont content in coal balls is unknown. To better understand the distribution of conodonts and their paleoecologic impor- tance in coal balls, samples were processed from coal balls of the middle Desmoinesian Springfield Coal Member of the Petersburg Formation from the Eby Pit of Peabody Coal Company's Lynnville Mine (SW'/4 , SWA, NE'A, Sec.
    [Show full text]
  • On Some Occurrences of Diplognathodus in Carboniferous Strata of Western Europe and North Africa
    v.d. Boogaard, Diplognathodus from W. Europe & N. Africa, Scripta Geol., 69 (1983) On some occurrences of Diplognathodus in Carboniferous strata of Western Europe and North Africa M. van den Boogaard Boogaard, M. van den. On some occurrences of Diplognathodus in Carboniferous strata of Western Europe and North Africa. - Scripta Geol., 69: 19-29, 1 fig., 1 pl., October 1983. The occurrence is reported of Diplognathodus coloradoensis, D. orphanus and D. ellesmerensis in some localities in Western Europe and one locality in North Afri- ca. M. van den Boogaard, Rijksmuseum van Geologie en Mineralogie, Hooglandse Kerkgracht 17, 2312 HS Leiden, The Netherlands. Introduction 19 Localities 20 Palaeontology 23 Concluding remarks 25 References 27 Introduction Species of the genus Diplognathodus may be useful for stratigraphie correlation of Carboniferous strata because some of them are probably stratigraphically short-ranging (e.g. D. coloradoensis according to Landing & Wardlaw, 1981, pp. 1255-1256). Because still little is known about the distribution of représentants of the genus outside North America I thought it useful to relate the few occur• rences of D. coloradoensis, D. orphanus and D. ellesmerensis I encountered during my investigation of Carboniferous limestones from Western Europe and North Africa. 20 v.d. Boogaard, Diplognathodus from W. Europe & N. Africa, Scripta Geol., 69 (1983) Acknowledgements Thanks for placing the samples at my disposal are due to Drs C.F. Winkler Prins, H.A. van Adrichem Boogaert, M.J.M. Bless, and A.C. van Ginkel. The informa• tion concerning the Cinderhill sample given by Dr W.H.C. Ramsbottom is much appreciated. Thanks also go to Mr J.G.M.
    [Show full text]
  • Pander Society Newsletter
    Pander Society Newsletter Compiled and edited by R. J. Aldridge, M. A. Purnell, and A. Thomas DEPARTMENT OF GEOLOGY UNIVERSITY OF LEICESTER LEICESTER LE1 7RH, UK Number 36 May 2004 www.conodont.net INTRODUCTORY REMARKS fter six very rewarding years, this is the last NEW CHIEF PANDERER Pander Society Newsletter to be presented by the Acurrent team. This makes it, perhaps, fitting for Dick Aldridge writes: In January 2004, I recognised that, us to begin our annual introduction by looking back to having entered my sixth year as President of the Pander see how the Society has fared over this interval. The Society ('Chief Panderer'), it was really past my time to answer is, we have certainly all been very active. The hand over to a successor. There is no stipulated length of period started with a bang (pun too bad to be intended) service in this office, but we have tried to make five in 1998 with a Pander Society meeting in Columbus, years more-or-less the norm, in order to share the Ohio, with the themes ‘Conodont evidence for impacts honour and the chore. Following traditional procedure, I and extinctions’ and ‘Hot topics in conodont asked three active members of the Society, Phil biochronology’. The same year, ECOS VII was held in Donoghue, Catherine Girard and Jeff Over, to act as a Italy, continuing the very successful pattern of these nomination committee, and asked anyone who wished events. Annual Pander Society meetings have continued to make a nomination or to contribute thoughts or in North America in each succeeding year, comments about the succession to contact them.
    [Show full text]
  • Reconstruction of the Multielement Apparatus of the Earliest Triassic Conodont, Hindeodus Parvus, Using Synchrotron Radiation X-Ray Micro-Tomography
    Journal of Paleontology, 91(6), 2017, p. 1220–1227 Copyright © 2017, The Paleontological Society 0022-3360/17/0088-0906 doi: 10.1017/jpa.2017.61 Reconstruction of the multielement apparatus of the earliest Triassic conodont, Hindeodus parvus, using synchrotron radiation X-ray micro-tomography Sachiko Agematsu,1 Kentaro Uesugi,2 Hiroyoshi Sano,3 and Katsuo Sashida4 1Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan 〈[email protected]〉 2Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo 679-5198, Japan 〈[email protected]〉 3Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan 〈[email protected]〉 4Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan 〈[email protected]〉 Abstract.—Earliest Triassic natural conodont assemblages preserved as impressions on bedding planes occur in a claystone of the Hashikadani Formation, which is part of the Mino Terrane, a Jurassic accretionary complex in Japan. In this study, the apparatus of Hindeodus parvus (Kozur and Pjatakova, 1976) is reconstructed using synchrotron radiation micro-tomography (SR–μCT). This species has six kinds of elements disposed in 15 positions forming the conodont apparatus. Carminiscaphate, angulate, and makellate forms are settled in pairs in the P1,P2, and M posi- tions, respectively. The single alate element is correlated with the S0 position. The S array is a cluster of eight rami- forms, subdivided into two inner pairs of digyrate S1–2 and two outer pairs of bipennate S3–4 elements. The reconstruction is similar to a well-known ozarkodinid apparatus model.
    [Show full text]
  • Exceptional Fossil Preservation During CO2 Greenhouse Crises? Gregory J
    Palaeogeography, Palaeoclimatology, Palaeoecology 307 (2011) 59–74 Contents lists available at ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo Exceptional fossil preservation during CO2 greenhouse crises? Gregory J. Retallack Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA article info abstract Article history: Exceptional fossil preservation may require not only exceptional places, but exceptional times, as demonstrated Received 27 October 2010 here by two distinct types of analysis. First, irregular stratigraphic spacing of horizons yielding articulated Triassic Received in revised form 19 April 2011 fishes and Cambrian trilobites is highly correlated in sequences in different parts of the world, as if there were Accepted 21 April 2011 short temporal intervals of exceptional preservation globally. Second, compilations of ages of well-dated fossil Available online 30 April 2011 localities show spikes of abundance which coincide with stage boundaries, mass extinctions, oceanic anoxic events, carbon isotope anomalies, spikes of high atmospheric carbon dioxide, and transient warm-wet Keywords: Lagerstatten paleoclimates. Exceptional fossil preservation may have been promoted during unusual times, comparable with fi Fossil preservation the present: CO2 greenhouse crises of expanding marine dead zones, oceanic acidi cation, coral bleaching, Trilobite wetland eutrophication, sea level rise, ice-cap melting, and biotic invasions. Fish © 2011 Elsevier B.V. All rights reserved. Carbon dioxide Greenhouse 1. Introduction Zeigler, 1992), sperm (Nishida et al., 2003), nuclei (Gould, 1971)and starch granules (Baxter, 1964). Taphonomic studies of such fossils have Commercial fossil collectors continue to produce beautifully pre- emphasized special places where fossils are exceptionally preserved pared, fully articulated, complex fossils of scientific(Simmons et al., (Martin, 1999; Bottjer et al., 2002).
    [Show full text]
  • Permian (Artinskian to Wuchapingian) Conodont Biostratigraphy in the Tieqiao Section, Laibin Area, South China
    Permian (Artinskian to Wuchapingian) conodont biostratigraphy in the Tieqiao section, Laibin area, South China Y.D. Suna, b*, X.T. Liuc, J.X. Yana, B. Lid, B. Chene, D.P.G. Bondf, M.M. Joachimskib, P.B. Wignallg, X.L. Laia a State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China b GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5, 91054 Erlangen, Germany c Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China d Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou, 510075, China e State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing, 210008, R.P. China f School of Environmental Sciences, University of Hull, Hull HU6 7RX, UK g School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK *Corresponding authors Email: [email protected] (Y.D. Sun) © 2017, Elsevier. Licensed under the Creative Commons Attribution- NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/ licenses/by-nc-nd/4.0/ 1 Abstract Permian strata from the Tieqiao section (Jiangnan Basin, South China) contain several distinctive conodont assemblages. Early Permian (Cisuralian) assemblages are dominated by the genera Sweetognathus, Pseudosweetognathus and Hindeodus with rare Neostreptognathodus and Gullodus. Gondolellids are absent until the end of the Kungurian stage—in contrast to many parts of the world where gondolellids and Neostreptognathodus are the dominant Kungurian conodonts. A conodont changeover is seen at Tieqiao and coincided with a rise of sea level in the late Kungurian to the early Roadian: the previously dominant sweetognathids were replaced by mesogondolellids.
    [Show full text]