Recent Advances in Heteromorph Ammonoid Palaeobiology
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GIS in the Paleontology
GIS in the Paleontology Notes from the field By Vincent Bruscas SECRET STUFF • SEC. 6309. CONFIDENTIALITY. • Information concerning the nature and specific location of a paleontological resource shall be exempt from disclosure under section 552 of title 5, United States Code, and any other law unless the Secretary determines that disclosure would-- • (1) further the purposes of this subtitle; • (2) not create risk of harm to or theft or destruction of the resource or the site containing the resource; and • (3) be in accordance with other applicable laws. MAP OF GRASSLANDS Paleo digs in Thunder Basin, Buffalo Gap, and Oglala National Grasslands. FS has a geodatabase program for Paleo that is called PaleoEX. The “ex” is an arcmap extension. The database has fields ranging from specific site location, geology, stratigraphic markers, types of fossils, preservation of fossils, unauthorized collection evidence, to the museum side with accessioning and even site mitigation. The program also allows to store photos of sites, reports, theft reports, court documents, etc. and it will produce reports as well. Needless to say it is way too cumbersome for 2 paleos to keep up to date. VOLUNTEER OPPURTUNITY, INTERESTED? Wyoming First dino dig with JR. It was his first year at University of Idaho. We packed all of his dorm stuff with camp equipment. He was a little stuffed. Devil’s Tower Interesting geological feature in the area. All of the area’s we work in are part of the Lance Creek or Hell’s Creek formation. Geology formation The Hell Creek Formation is an intensively-studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. -
Theropod Teeth from the Upper Maastrichtian Hell Creek Formation “Sue” Quarry: New Morphotypes and Faunal Comparisons
Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons TERRY A. GATES, LINDSAY E. ZANNO, and PETER J. MAKOVICKY Gates, T.A., Zanno, L.E., and Makovicky, P.J. 2015. Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons. Acta Palaeontologica Polonica 60 (1): 131–139. Isolated teeth from vertebrate microfossil localities often provide unique information on the biodiversity of ancient ecosystems that might otherwise remain unrecognized. Microfossil sampling is a particularly valuable tool for doc- umenting taxa that are poorly represented in macrofossil surveys due to small body size, fragile skeletal structure, or relatively low ecosystem abundance. Because biodiversity patterns in the late Maastrichtian of North American are the primary data for a broad array of studies regarding non-avian dinosaur extinction in the terminal Cretaceous, intensive sampling on multiple scales is critical to understanding the nature of this event. We address theropod biodiversity in the Maastrichtian by examining teeth collected from the Hell Creek Formation locality that yielded FMNH PR 2081 (the Tyrannosaurus rex specimen “Sue”). Eight morphotypes (three previously undocumented) are identified in the sample, representing Tyrannosauridae, Dromaeosauridae, Troodontidae, and Avialae. Noticeably absent are teeth attributed to the morphotypes Richardoestesia and Paronychodon. Morphometric comparison to dromaeosaurid teeth from multiple Hell Creek and Lance formations microsites reveals two unique dromaeosaurid morphotypes bearing finer distal denticles than present on teeth of similar size, and also differences in crown shape in at least one of these. These findings suggest more dromaeosaurid taxa, and a higher Maastrichtian biodiversity, than previously appreciated. -
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Dorjnamjaa et al. Mongolian Geoscientist 49 (2019) 41-49 https://doi.org/10.5564/mgs.v0i49.1226 Mongolian Geoscientist Review paper New scientific direction of the bacterial paleontology in Mongolia: an essence of investigation * Dorj Dorjnamjaa , Gundsambuu Altanshagai, Batkhuyag Enkhbaatar Department of Paleontology, Institute of Paleontology, Mongolian Academy of Sciences, Ulaanbaatar 15160, Mongolia *Corresponding author. Email: [email protected] ARTICLE INFO ABSTRACT Article history: We review the initial development of Bacterial Paleontology in Mongolia and Received 10 September 2019 present some electron microscopic images of fossil bacteria in different stages of Accepted 9 October 2019 preservation in sedimentary rocks. Indeed bacterial paleontology is one the youngest branches of paleontology. It has began in the end of 20th century and has developed rapidly in recent years. The main tasks of bacterial paleontology are detailed investigation of fossil microorganisms, in particular their morphology and sizes, conditions of burial and products of habitation that are reflected in lithological and geochemical features of rocks. Bacterial paleontology deals with fossil materials and is useful in analysis of the genesis of sedimentary rocks, and sedimentary mineral resources including oil and gas. The traditional paleontology is especially significant for evolution theory, biostratigraphy, biogeography and paleoecology; however bacterial paleontology is an essential first of all for sedimentology and for theories sedimentary ore genesis or biometallogeny Keywords: microfossils, phosphorite, sedimentary rocks, lagerstatten, biometallogeny INTRODUCTION all the microorganisms had lived and propagated Bacteria or microbes preserved well as fossils in without breakdowns. Bacterial paleontological various rocks, especially in sedimentary rocks data accompanied by the data on the first origin alike natural substances. -
Seasonality Manuscript 20210622 Final Submisson
Bone histology of acipenseriform shes reveals seasonality during the nal years of the Mesozoic. Jan Smit ( [email protected] ) VU University Amsterdam Melanie During Uppsala University Camille Berruyer European Synchrotron Radiation Facility Dennis Voeten European Synchrotron Radiation Facility https://orcid.org/0000-0002-2090-2824 Paul Tafforeau European Synchrotron Radiation Facility https://orcid.org/0000-0002-5962-1683 Sophie Sanchez Uppsala University https://orcid.org/0000-0002-3611-6836 Susan Verdegaal Warmerdam Vrije Universiteit Jeroen van der Lubbe Faculty of Science, Vrije University https://orcid.org/0000-0001-7545-6502 Biological Sciences - Article Keywords: Cretaceous-Paleogene (KPg), exstinction, seasonality Posted Date: July 12th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-646564/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License 1 Bone histology of acipenseriform fishes reveals seasonality during the final years of 2 the Mesozoic. 3 Melanie A. D. During1,2, Jan Smit1*, Camille Berruyer3, Dennis F. A. E. Voeten3, Paul 4 Tafforeau3, Sophie Sanchez2,3, Suzan Verdegaal-Warmerdam1 & Jeroen (H) J. L. van der 5 Lubbe1,4 6 *[email protected] 7 1Department of Earth Sciences, Faculty of Science, Vrije Universiteit Amsterdam, De 8 Boelelaan 1085, 1081HV Amsterdam, the Netherlands 9 2Subdepartment of Evolution and Development, Department of Organismal Biology, 10 Evolutionary Biology Centre, Uppsala University Norbyvägen 18A, 752 36 Uppsala, 11 Sweden 12 3European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS-40220, 38043 13 Grenoble Cedex, France 14 4School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, 15 Cardiff, CF10 3AT, United Kingdom 1 16 The Cretaceous-Paleogene (KPg) mass extinction ~66 million years ago (Ma) was 17 triggered by the Chicxulub impact on the present-day Yucatán Peninsula. -
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NEIL H. LANDMAN CURATOR, CURATOR-IN-CHARGE AND PROFESSOR DIVISION OF PALEONTOLOGY HIGHEST DEGREE EARNED Ph.D. AREA OF SPECIALIZATION Evolution, life history, and systematics of externally shelled cephalopods EDUCATIONAL EXPERIENCE Ph.D. in Geology, Yale University, 1982 M. Phil. in Geology, Yale University, 1977 M.S. in Earth Sciences, Adelphi University, 1975 B.S. in Mathematics, summa cum laude, Polytechnic University of New York, 1972 PREVIOUS EXPERIENCE IN DOCTORAL EDUCATION FACULTY APPOINTMENTS Adjunct Professor, Department of Biology, City College Adjunct Professor, Department of Geology, Brooklyn College GRADUATE ADVISEES Susan Klofak, Biology, CUNY, 1999-present Krystal Kallenberg, Marine Sciences, Stony Brook, 2003-present GRADUATE COMMITTEES Christian Soucier, Biology, Brooklyn College, 2004-present Krystal Kallenberg, Marine Sciences, Stony Brook, 2003-present Yumiko Iwasaki, Geology, CUNY, 2000-2009 Emily Allen, Geology, University of Chicago, 2002-2005 Susan Klofak, Biology, CUNY, 1996-present Claude Monnet, University of Zurich, presently Sophie Low, Geology, Harvard University RESEARCH GRANT SUPPORT Kosciuszko Foundation. Comparative study of ammonite faunas from the United States Western Interior and Polish Lowland. Post-doc: Izabela Ploch, Geological Museum of Polish Geological Institute. 2011. NSF Grant MR1-R2 (Co-PI): Acquisition of a High Resolution CT-Scanner at the American Museum of Natural History: 2010-2013. NSF Grant No. DBI 0619559 (Co-PI): Acquisition of a Variable Pressure SEM at the AMNH: 2006-2009 NSF Grant No. EAR 0308926 (PI): Collaborative Research: Paleobiology, paleoceanography, and paleoclimatology of a time slice through the Western Interior Seaway: 2003-2006 National Science Foundation, Collaborative Research: Soft Tissues and Membrane Preservation in Permian Cephalopods, $40,000, February 1, 2002-January 31, 2006. -
The Barremian Heteromorph Ammonite Dissimilites from Northern Italy: Taxonomy and Evolutionary Implications
The Barremian heteromorph ammonite Dissimilites from northern Italy: Taxonomy and evolutionary implications ALEXANDER LUKENEDER and SUSANNE LUKENEDER Lukeneder, A. and Lukeneder, S. 2014. The Barremian heteromorph ammonite Dissimilites from northern Italy: Taxon- omy and evolutionary implications. Acta Palaeontologica Polonica 59 (3): 663–680. A new acrioceratid ammonite, Dissimilites intermedius sp. nov., from the Barremian (Lower Cretaceous) of the Puez area (Dolomites, northern Italy) is described. Dissimilites intermedius sp. nov. is an intermediate form between D. dissimilis and D. trinodosum. The new species combines the ribbing style of D. dissimilis (bifurcating with intercalating single ribs) with the tuberculation style of D. trinodosum (trituberculation on entire shell). The shallow-helical spire, entirely comprising single ribs intercalated by trituberculated main ribs, is similar to the one of the assumed ancestor Acrioceras, whereas the increasing curvation of the younger forms resembles similar patterns observed in the descendant Toxoc- eratoides. These characters support the hypothesis of a direct evolutionary lineage from Acrioceras via Dissimilites to Toxoceratoides. D. intermedius sp. nov. ranges from the upper Lower Barremian (Moutoniceras moutonianum Zone) to the lower Upper Barremian (Toxancyloceras vandenheckii Zone). The new species allows to better understand the evolu- tion of the genus Dissimilites. The genus appears within the Nicklesia pulchella Zone represented by D. duboise, which most likely evolved into D. dissimilis. In the Kotetishvilia compressissima Zone, two morphological forms developed: smaller forms very similar to Acrioceras and forms with very long shaft and juvenile spire like in D. intermedius sp. nov. The latter most likely gave rise to D. subalternatus and D. trinodosum in the M. -
Geologie Und Paläontologie in Westfalen Heft 51
WESTFÄLISCHES MUSEUM FÜR NATURKUNDE Geologie und Paläontologie in Westfalen Heft 51 c '5 1 1 CU E Calycoceras 1 1 1 o guerangeri 1 1 c Zone Q) 0 3 0 1 .._ 1 1 1 Q) 1 1 1 ...Q -----------------------------· 1 1 lnoceramus pictus 0 1 1 Event 1 2 5 1 1 1 1 1 Acanthoceras 1 1 1 1 1 1 jukesbrownei ~'.:._'.:._'.:._~'-=-~-'o'.:.."""'=-'.:..~-=:-= 1 Zone 1 1 1 1 1 1 1 0 1 1 1 1 1 c 1 1 CU -·--------------------- --- --- 1 1 1 E 1 1 1 0 5- c ~ 1 1 1 Q) '- ~ 1 1 1 Cl) cb 1 1 0 ~Cl) 1 ~ & Turrilites acutus- 1 1 1 Q; _g cu Subzone 1 1 ...... E 1 1 1 ...... ~ .8 ...... (.) 0 0 1 1 · - <:(..t:: 1 1 1 ~ 1 1 1 1 1 Stratigraph ie und Ammonitenfaunen des westfälischen Cenoman Ulrich Kaplan, William James Kenn edy, Jens Lehmann und Ryszard Marcinowski [~r.:·11~j Landschaftsverband tttfüt) Westfalen-Lippe Hinweise für Autoren In der Schriftenreihe Geologie und Paläontologie in Westfalen werden geowissenschaftliche Beiträge veröffent• licht, die den Raum Westfalen betreffen. Druckfertige Manuskripte sind an die Schriftleitung zu schicken. Aufbau des Manuskriptes 1. Titel kurz und bezeichnend. 2. Klare Gliederung. 3. Zusammenfassung in Deutsch am Anfang der Arbeit. Äußere Form 4. Manuskriptblätter einseitig und weitzeilig beschreiben; Maschinenschrift, Verbesserungen in Druckschrift. 5. Unter der Überschrift: Name des Autors (ausgeschrieben), Anzahl der Abbildungen, Tabellen und Tafeln; An schrift des Autors auf der 1. Seite unten. 6. Literaturzitate im Text werden wie folgt ausgeführt: (AUTOR, Erscheinungsjahr: evtl. -
Sucesión De Amonitas Del Cretácico Superior (Cenomaniano – Coniaciano) De La Parte Más Alta De La Formación Hondita Y De L
Boletín de Geología Vol. 33, N° 1, enero-junio de 2011 SUCESIÓN DE AMONITAS DEL CRETÁCICO SUPERIOR (CENOMANIANO – CONIACIANO) DE LA PARTE MÁS ALTA DE LA FORMACIÓN HONDITA Y DE LA FORMACIÓN LOMA GORDA EN LA QUEBRADA BAMBUCÁ, AIPE - HUILA (COLOMBIA, S. A.) Pedro Patarroyo1 RESUMEN La sección de la quebrada Bambucá (Aipe - Huila) posee una buena exposición de los depósitos del Cretácico del Valle Superior del Magdalena. De la parte alta de la Formación Hondita se recolectaron Acanthoceras sp. y Rhynchostreon sp. del Cenomaniano superior. Dentro del segmento inferior de la Formación Loma Gorda se hallaron Choffaticeras (C.) cf. segne, Fagesia cf. catinus, Neoptychites cf. andinus, Mitonia gracilis, Morrowites sp., Nannovascoceras ? sp., Quitmaniceras ? sp., Benueites ? sp. junto con Mytiloides kossmati, M. goppelnensis y Anomia sp. del Turoniano inferior. Estratigráficamente arriba aparecen Paramammites ? sp., Hoplitoides sp. H. ingens, H. cf. lagiraldae, Codazziceras ospinae, Allocrioceras sp., que pueden estar representando entre el Turoniano inferior y medio. Para la parte alta de este segmento se encontraron Prionocycloceras sp. P. guayabanum, Reesidites subtuberculatum, Subprionotropis colombianus, Mytiloides scupini, Dydimotis sp., Gauthiericeras sp., Anagaudryceras ? sp., Eulophoceras jacobi, Paralenticeras sieversi, Hauericeras cf. madagascarensis, Peroniceras (P.) subtricarinatum, Forresteria (F.) sp., Barroisiceras cf. onilahyense, Ankinatsytes venezolanus que abarcan entre el Turoniano superior y el Coniaciano. Con base en la fauna colectada no es posible establecer los límites Cenomaniano/Turoniano y Turoniano/Coniaciano. Palabras clave: Amonitas, Cretácico superior, Valle Superior del Magdalena, Aipe-Huila-Colombia. UPPER CRETACEOUS AMMONITE SUCCESSION (CENOMANIAN – CONIACIAN) RELATED TO THE UPPER HONDITA AND LOMA GORDA FORMATIONS ALONG THE BAMBUCÁ CREEK, AIPE - HUILA (COLOMBIA, S.A.) ABSTRACT The Bambucá creek section (Aipe - Huila) shows a very good exposition of the Upper Magdalena Valley Cretaceous deposits. -
Pdf Ichnospecies Funalichnus Strangulatus (Fritsch 1883), Upper Schlirf, M.; Uchman, A
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Geologica Saxonica - Journal of Central European Geology Jahr/Year: 2016 Band/Volume: 62 Autor(en)/Author(s): Niebuhr Birgit, Wilmsen Markus Artikel/Article: Ichnofossilien 181-238 62: 181 – 238 29 Dec 2016 © Senckenberg Gesellschaft für Naturforschung, 2016. 16. Ichnofossilien 16. Ichnofossils Birgit Niebuhr und Markus Wilmsen Senckenberg Naturhistorische Sammlungen Dresden, Museum für Mineralogie und Geologie, Sektion Paläozoologie, Königsbrücker Land- straße 159, 01109 Dresden, Deutschland; [email protected], [email protected] Revision accepted 18 July 2016. Published online at www.senckenberg.de/geologica-saxonica on 29 December 2016. Kurzfassung Die taxonomische Revision der Spurenfossilien der Elbtal-Gruppe ergab 28 Ichnotaxa, die sich verteilen auf 1. einfache Spuren: Lockeia amygdaloides (Seilacher), Bergaueria klieni (Geinitz), Fluchtspuren; 2. unverzweigte Spuren: Skolithos linearis (Haldeman), Taenidium cameronensis (Brady), Funalichnus strangulatus (Frič), Planolites isp.; 3. verzweigte Spuren: Chondrites targionii (Brongniart), Ophio morpha saxonica (Geinitz), O. ramea (Geinitz), Thalassinoides suevicus (Rieth), Keckia annulata Glocker, K. cylindrica von Otto, K. no du losa von Otto, Asterosoma? wohlfarthi (von Otto); 4. horizontal-konzentrische Spuren: A. radiciforme von Otto, A. coxii (Lesquereux), Dactyloidites ottoi (Geinitz); 5. dreidimensional-gewundene -
Redalyc.SUCESIÓN DE AMONITAS DEL CRETÁCICO SUPERIOR (CENOMANIANO – CONIACIANO) DE LA PARTE MÁS ALTA DE LA FORMACIÓN HONDIT
Boletín de Geología ISSN: 0120-0283 [email protected] Universidad Industrial de Santander Colombia Patarroyo, Pedro SUCESIÓN DE AMONITAS DEL CRETÁCICO SUPERIOR (CENOMANIANO – CONIACIANO) DE LA PARTE MÁS ALTA DE LA FORMACIÓN HONDITA Y DE LA FORMACIÓN LOMA GORDA EN LA QUEBRADA BAMBUCÁ, AIPE - HUILA (COLOMBIA, S. A.) Boletín de Geología, vol. 33, núm. 1, enero-junio, 2011, pp. 69-92 Universidad Industrial de Santander Bucaramanga, Colombia Disponible en: http://www.redalyc.org/articulo.oa?id=349632022005 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Boletín de Geología Vol. 33, N° 1, enero-junio de 2011 SUCESIÓN DE AMONITAS DEL CRETÁCICO SUPERIOR (CENOMANIANO – CONIACIANO) DE LA PARTE MÁS ALTA DE LA FORMACIÓN HONDITA Y DE LA FORMACIÓN LOMA GORDA EN LA QUEBRADA BAMBUCÁ, AIPE - HUILA (COLOMBIA, S. A.) Pedro Patarroyo1 RESUMEN La sección de la quebrada Bambucá (Aipe - Huila) posee una buena exposición de los depósitos del Cretácico del Valle Superior del Magdalena. De la parte alta de la Formación Hondita se recolectaron Acanthoceras sp. y Rhynchostreon sp. del Cenomaniano superior. Dentro del segmento inferior de la Formación Loma Gorda se hallaron Choffaticeras (C.) cf. segne, Fagesia cf. catinus, Neoptychites cf. andinus, Mitonia gracilis, Morrowites sp., Nannovascoceras ? sp., Quitmaniceras ? sp., Benueites ? sp. junto con Mytiloides kossmati, M. goppelnensis y Anomia sp. del Turoniano inferior. Estratigráficamente arriba aparecen Paramammites ? sp., Hoplitoides sp. -
Acta Geologica Polonica, Vol
Acta Geologica Polonica, Vol. 50 (2000), No. 4, pp. 407-419 On some Late Turonian and Early Coniacian (Upper Cretaceous) heteromorph ammonites from Germany FRANK WIESE Institut für Paläontologie, FU Berlin, Malteserstr. 74-100 D-12249 Berlin. E-mail: [email protected] ABSTRACT: WIESE, F. 2000. On some Late Turonian and Early Coniacian (Upper Cretaceous) heteromorph ammonites from Germany. Acta Geologica Polonica, 50 (4), 407-419. Warszawa. Five heteromorph ammonite taxa belonging to the Nostoceratidae and the Diplomoceratidae are described from the Upper Turonian and Lower Coniacian of northern Germany and Saxony. The investigation serves the presentation of additional material of Hyphantoceras flexuosum, Neocrioceras paderbornense and Scalarites turoniense that are rarely documented in northern Germany and Saxony. Furthermore, one new species, Hyphantoceras ernsti sp. n., is introduced. One taxon is described in open nomenclature as nostoceratid gen. et sp. indet. Key words: Upper Cretaceous, Germany, Turonian, Coniacian, Ammonite Taxonomy, Nostoceratidae, Diplomoceratidae INTRODUCTION northern Germany (WOOD & al. 1984), which attracted the attention of collectors and palaeontologists because The description of the Turonian and Coniacian of its abundant and highly diverse invertebrate fauna ammonite faunas from Germany has a long tradition. (DAHMER & ERNST 1986, KAPLAN 1992, METZDORF The first monographic treatment on Upper Cretaceous 1992, 1993). Above the Hyphantoceras Event, in the ammonites was that of SCHLÜTER (1867) in which he uppermost part of the Lower Limestone Unit and the also described Turonian and Lower Coniacian material. succeeding marl/limestone alternations, the Grau- From Saxony in southeastern Germany, Turonian to Weiße Wechselfolge (WOOD & al. 1984), in the remain- Coniacian ammonites were investigated and figured by, der of the Upper Turonian and Lower Coniacian, amongst others, REUSS (1845), GEINITZ (1843, 1849- ammonites become suddenly and significantly rarer and 1850), PETRASCHECK (1902), WANDERER (1909) and less diverse. -
Scaphitid Ammonite Correlation of the Late Maastrichtian Deposits in Poland and Denmark
Scaphitid ammonite correlation of the Late Maastrichtian deposits in Poland and Denmark Machalski, M. 1996. Scaphitid ammonite correlation of the Late Maastrichtian deposits in Poland and Denmark. - Acta Palaeontologica Polonica 41,4,369-383. Evolutionary changes in the ribbing density on body chambers in samples of the scaphitid ammonite Hopbscaphites constrictus (J.Sowerby, 1817) are used for time correlation of the Kazimierz Opoka (Late Maastrichtian, Belemnella kazimiro- uiensis Zone, Poland) with the Danish White Chalk succession. It is proposed that the upper part of the Kazimierz Opoka corresponds to the lower part of the B. kazimiroviensis Zone in Denmark while the lower part of the unit probably corresponds to the upper part of the Belemnitellajunior Zone in Denmark. This correlation, if correct, suggests diachronism of the lower boundary of the B. kazimirouiensis Zone. K e y w o r d s : Maastrichtian, Scaphitidae, ammonites, Poland, Denmark, strati- graphy. Marcin Machalski, Instytut Paleobiologii PAN, al. ~wirkii Wigury 93, PL-02-089 Warszawa, Poland Introduction The Kazirnierz Opoka is an informal lithostratigraphical term (Wyrwicka 1980) for the Late Maastrichtian siliceous chalk unit exposed along the Vistula River near Kazimierz Dolny (called also 'Kazimierz' or 'Kazimierz- -on-Vistula'), Central Poland (Fig. 1A-C). This unit yields possibly one of the richest fossil assemblages known from the European Maastrichtian (see Abdel-Gawad 1986 and Radwariski 1996 for comprehensive review). Ammonites from the Kazimierz Opoka were described by Eopuski (1911 ), Poiaryska (1953), and Blaszkiewicz ( 1980). Radwafiski ( 1996) described predation traces on Hoploscaphites constrictus (J. Sowerby, 1817) whereas Marcinowski & Radwanski (1996) commented on two pachydiscids from the top of Kazimierz Opoka [the specimen identified by them as Anapachydiscus cf.