Филогения Семейства Dactylioceratidae Hyatt, 1867
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Villers-Bocage À 1/50 000
NOTICE EXPLICATIVE DE LA FEUILLE VILLERS-BOCAGE À 1/50 000 par Y. VERNHET, P. MAURIZOT, J. LE GALL, P. GIGOT, L. DUPRET, G. LEROUGE, J.C. BESOMBES, G. BARBIER, T. PAY avec la collaboration de J. PELLERIN, O. DUGUÉ, G. FILY 2002 Éditions du BRGM Service géologique national Références bibliographiques. Toute référence en bibliographie à ce document doit être faite de la façon suivante : – pour la carte : VERNHET Y., MAURIZOT P., LE GALL J., GIGOT P., DUPRET L., BARBIER G., LEROUGE G., BESOMBES J.C., PELLERIN J. (2002) – Carte géol. France (1/50 000), feuille Villers-Bocage (145). Orléans : BRGM. Notice explicative par Y. VERNHET et al. (2002), 229 p. – pour la notice : VERNHET Y., MAURIZOT P., LE GALL J., GIGOT P., DUPRET L., LEROUGE G., BESOMBES J.C., BARBIER G., PAY T., avec la collaboration de PELLERIN J., DUGUÉ O., FILY G. (2002) – Notice explicative, Carte géol. France (1/50 000), feuille Villers- Bocage (145). Orléans : BRGM, 229 p. Carte géologique par Y. VERNHET et al. (2002). © BRGM, 2002. Tous droits de traduction et de reproduction réservés. Aucun extrait de ce document ne peut être reproduit, sous quelque forme ou par quelque procédé que ce soit (machine électronique, mécanique, à photocopier, à enregistrer ou tout autre) sans l’autorisation préalable de l’éditeur. ISBN : 2-7159-1145-9 SOMMAIRE INTRODUCTION 7 SITUATION GÉOGRAPHIQUE 7 CADRE GÉOLOGIQUE RÉGIONAL – PRÉSENTATION DE LA CARTE 9 Formations protérozoïques 11 Formations paléozoïques 12 Formations mésozoïques et cénozoïques 13 TRAVAUX ANTÉRIEURS – CONDITIONS D’ÉTABLISSEMENT -
Characteristic Jurassic Mollusks from Northern Alaska
Characteristic Jurassic Mollusks From Northern Alaska GEOLOGICAL SURVEY PROFESSIONAL PAPER 274-D Characteristic Jurassic Mollusks From Northern Alaska By RALPH W. IMLAY A SHORTER CONTRIBUTION TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 274-D A study showing that the northern Alaskan faunal succession agrees with that elsewhere in the Boreal region and in other parts of North America and in northwest Europe UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1955 UNITED STATES DEPARTMENT OF THE INTERIOR Douglas McKay, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. - BMMH§ts (paper cover) Price $1.00 CONTENTS Page Abstract_________________ 69 Introduction _________________ 69 Biologic analysis____________ 69 Stratigraphic summary. _______ 70 Ages of fossils________________ 73 Comparisons with other faunas. 75 Ecological considerations___ _ 75 Geographic distribution____. 78 Summary of results ___________ 81 Systematic descriptions__ _. 82 Literature cited____________ 92 Index_____________________ 95 ILLUSTRATIONS [Plates &-13 follow Index] PLATE 8. Inoceramus and Gryphaea 9. Aucella 10. Amaltheus, Dactylioceras, "Arietites," Phylloceras, and Posidonia 11. Ludwigella, Dactylioceras, and Harpoceras. 12. Pseudocadoceras, Arcticoceras, Amoeboceras, Tmetoceras, Coeloceras, and Pseudolioceras 13. Reineckeia, Erycites, and Cylindroteuthis. Page FIGXTKE 20. Index map showing Jurassic fossil collection localities in northern Alaska. -
Austroalpine Liassic Ammonites from the Adnet Formation (Northern Calcareous Alps) 163-211 ©Geol
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Jahrbuch der Geologischen Bundesanstalt Jahr/Year: 1993 Band/Volume: 136 Autor(en)/Author(s): Meister Christian, Böhm Florian Artikel/Article: Austroalpine Liassic Ammonites from the Adnet Formation (Northern Calcareous Alps) 163-211 ©Geol. Bundesanstalt, Wien; download unter www.geologie.ac.at Jb. Geol. B.-A. ISSN 0016-7800 Band 136 S.163-211 Wien, Juli 1993 Austroalpine Liassic Ammonites from the Adnet Formation (Northern Calcareous Alps) By CHRISTIAN MEISTER & FLORIAN BÖHM *) With 14 Text-Figures and 9 Plates Oslerreich Salzburg Oberöslerreich Nördliche Kalkalpen Lias Ammoniten Oslerreichische Karle 1. 50.000 Biostratigraphie BI/1l1er94, 95, 96,126 Palaeogeographie Contents Zusammenfassung 163 Abstract. .. 164 Resume 164 1. Introduction 164 2. Geographical and Geological Framework 164 3. Lithological Description and Qualitative/Quantitative Ammonite Distributions 165 3.1. Schmiedwirt Quarry 165 3.2. Breitenberg Quarry 166 3.3. Rotkogel Outcrop 166 3.4. Rötelstein Outcrop 168 4. Systematic Palaeontology 169 PhylioceratinaARKELL 1950 171 LytoceratinaHYATT1889 174 Ammonitina HYATT 1889 175 5. Biostratigraphical Framework 184 5.1. Sinemurian 184 5.1.1. Early Sinemurian 184 5.1.2. Late Sinemurian 184 5.2. Pliensbachian 184 5.2.1. Early Pliensbachian (Carixian) 184 5.2.2. Late Pliensbachian (Domerian) 186 5.3. Toarcian 186 6. Faunal Composition and Palaeogeographical Remarks 189 7. Conclusion 190 Acknowledgements 190 References 208 Oberostalpine Liasammoniten aus der Adnetformation (Nördlichen Kalkalpen) Zusammenfassung Das Oberostalpin spielt eine Schlüsselrolle für das Verständnis der Verteilungsmuster der jurassischen Ammonitenfaunen und für die Fixierung genauer biostratigraphischer Korrelationen zwischen Tethyaler und Euroborealer Faunenprovinz. -
Bbm:978-3-0348-7827-2/1.Pdf
Literaturverzeichnis Mit Asterisk bezeichnete Arbeiten sind besonders von Revisionen in systematischer und/oder bio stratigraphischer Hinsicht betroffen, oder dienten als Grundlage für die Korrelation auf Tabelle 4. ACCORSI BENINI, C. & BROGLIO LORIGA, C. (1977): Lithiotis Güm• BOULE, M. & THEVENIN, A. (1906,1907): Types du Prodrome de Pale bel, 1871 e Cochlearites Reis, 1903. 1°. Revisione morfologica e ontologie universelle de d'Orbigny. - Ann. Paleont., 1, p. 97-100, tassonomica. - Boll. Soc. paleont ital., 16, 1, p. 15-60. 165-172, 193-196, Taf. 8, 9, 12, 13, 21, 22; 2, p. 89-96, 161-172, AGER, D. V. & CALLOMON, J. H. (1971): On the Liassie age of the Taf. 13,14,23,24. "Bathonian" of Villäny (Baranya). - Ann. Univ. Sei. Budapest BOURDENET, A. M. (1964): Les Pleuroceras du Domerien superieur Eötvös, Sect geo!., 14, p. 5-16. de Charrnoille (Haute-Saöne). - Ann. sei. Univ. Besan~on, (2) 18, ARKELL, W. J. (1956): Jurassie geology of the world. - London and p.3-24. Edinburgh (Oliver & Boyd). *BREMER, H. (1965): Zur Ammonitenfauna und Stratigraphie des ARKELL, W. J., BRAMKAMP, R. A. & STEINEKE, M. (1952): Jurassie unteren Lias (Sinemurium bis Carixium) in der Umgebung von Ammonites from Jebel Tuwaiq, central Arabia. - Phi!. Trans. r. Ankara (Türkei). - N. Jb. Geol. Paläont., Abh., 122, S. 127-221. Soc. London, (B) 236, p. 241-313. BUCKMAN, S. S. (1918): Jurassie chronology: I. Lias. - Quart 1. geol. *ARKELL, W. J., KUMMEL, B. & WRIGHT, C. W. (1957): Mesozoic Soc. London, 73 (1917), p. 257-327. Ammonoidea. In: MOORE, R. C. (Ed.): Treatise on invertebrate - (1909-30): Yorkshire Type Ammonites (ab vol. -
Biostor-118662.Pdf
/v^ GL''i£. The stratigraphy and ammonite fauna of the Upper Lias of Northamptonshire ,^^ UBRAR'' M. K. Howarth Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD Contents Abstract 235 Introduction . 236 Acknowledgements 237 Stratigraphical succession 237 The Yorkshire coast 243 Zonal subdivisions and correlation with Yorkshire 244 Correlations with other areas .... 246 England ....... 246 Southern France, the Alps and Italy . 247 North-eastern Siberia, northern Alaska, arctic Canada, Greenland, Spitzbergen 249 Palaeontology ..... 249 Family Dactylioceratidae Hyatt 249 Genus Dactylioceras Hyatt 252 Subgenus Orthodactylites Buckman 253 Dactylioceras {Orthodactylites) semiannulatum sp. nov. 253 Genus Nodicoeloceras Buckman . 256 Nodicoeloceras crassoides (Young & Bird) 256 Genus Peronoceras Hyatt .... 259 Peronoceras fibulatiim (J. de C. Sowerby) 260 Peronoceras turriculatum (Simpson) 262 Peronoceras subarmatum (Young & Bird) 262 Peronoceras perarmatum (Young & Bird) 263 Genus Zugodactylites Buckman . 264 Zugodactylites braUnianus (d'Orbigny) 268 Zugodactylites rotundiventer Buckman . 273 Zugodactylites thompsoni sp. nov. 274 Zugodactylites pseudobraunianus (Monestier) 276 Genus Porpoceras Buckman 278 Porpoceras vortex (Simpson) 280 References ....... 281 Index ........ 284 Abstract The Upper Lias of Northamptonshire is redescribed from a now obscured exposure of the 3 m of lime- stones and clays, up to the Upper Cephalopod Bed, that could formerly be seen above the Marlstone Rock Bed in a quarry near Byfield, and from Beeby Thompson's descriptions and collections from the overlying 50 m of clays that were exposed in numerous 19th-century brickpits around Northampton. The three lowest subzones of the Upper Lias occur in the top 1 m of the Marlstone Rock Bed. This is overlain by the Transition Bed of Semicelatum Subzone age and the Abnormal Fish Bed of Exaratum Subzone age. -
Bulletin of the British Museum (Natural History), Geology
THE SHELL STRUCTURE OF THE LIASSIC AMMONITE FAMILY DACTYLIOCERATIDAE By MICHAEL KINGSLEY HOWARTH CONTENTS Page Abstract .... 47 I. Introduction 48 II. Material used and preparation 49 III. The main shell . 50 IV. The inner shell . 52 V. The dorsal shell 53 VI. The Septal Prismatic Layer 53 VII. Ontogenetic development 55 (a) Protoconch, first whorl and nepionic constriction 56 (b) Smooth whorls after the nepionic constriction . 56 (c) Development of the ribs and the inner shell 57 (d) Insertion of septa and development of the Septal Prismatic Layer ..... 57 (e) Position of secretion of individual layers 60 VIII. Occurrence of inner shell . 61 (a) Dactylioceratidae . 61 (b) Other ammonites . 61 IX. Nomenclature 63 X. Function of the inner shell 64 XL References .... 65 XII. Index ..... 66 ABSTRACT Dactylioceratidae are thought to be unique amongst Jurassic and Cretaceous ammonites, in that, as well as the normal main shell with its thin Outer Prismatic, thick Nacreous and thin Inner Prismatic Layers, they also possess an inner shell, consisting of thin Outer Prismatic and thick Inner Nacreous Layers, which is added to the inside of the main shell, but bridges across the inside of the ribs leaving cavities with characteristic flat floors. The inner shell lines the whole of the lateral and ventral parts of the main shell, while its front edge is \ to \ whorl behind the mouth border and is similar in shape. It is formed by division of the Inner Prismatic Layer when ventral ribs first develop three whorls after the protoconch. At the rear of the body chamber another new layer, the thick Septal Prismatic Layer, lines the whole of the inside of the shell, including the dorsum, where it bridges across the ribs of the venter of the previous whorl leaving crescent-shaped cavities. -
Reconstruction of Local and Global Marine Paleoredox Conditions For
Reconstruction of local and global marine paleoredox conditions for the northeast-Panthalassan (British Columbia, Canada) expression of the Toarcian Oceanic Anoxic Event using a multi-proxy approach by Alexandra Kunert A thesis presented to the University of Waterloo in fulfilment of the thesis requirement for the degree of Master of Science in Earth Sciences Waterloo, Ontario, Canada, 2020 © Alexandra Kunert 2020 Author’s Declaration I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. ii Statement of Contributions The content of this thesis is my own work. Preliminary data (2018 sample set XRD, major & some trace elements, and carbon content) from this thesis was published in a Summary of Activities technical paper for Geoscience British Columbia (Kunert, et al., 2019) with my supervisor Dr. Brian Kendall, and collaborators at Petronas Canada (Dr. Tom Moslow, Gerry Nyberg, Bernadette Pedersen) and Sasol Canada (Craig Smith). No portion of the technical paper has been used in the writing of this thesis. iii Abstract The Toarcian Oceanic Anoxic Event (T-OAE) of the Early Jurassic is one of several Mesozoic instances of expanded ocean anoxia, coupled with feedbacks and perturbations in Earth’s systems. The drivers for these feedbacks are debated, but the general consensus is that the event is initially rooted in the emplacement of the Karoo–Ferrar large igneous province. The T-OAE is also linked to a second-order mass extinction in the marine and terrestrial realms. -
Magnetoestratigrafía Y Paleomagnetismo Del Jurásico Inferior Marino De La Cuenca Neuquina, República Argentina
Tesis de Posgrado Magnetoestratigrafía y paleomagnetismo del Jurásico Inferior marino de la Cuenca Neuquina, República Argentina Iglesia Llanos, María Paula 1997 Tesis presentada para obtener el grado de Doctor en Ciencias Geológicas de la Universidad de Buenos Aires Este documento forma parte de la colección de tesis doctorales y de maestría de la Biblioteca Central Dr. Luis Federico Leloir, disponible en digital.bl.fcen.uba.ar. Su utilización debe ser acompañada por la cita bibliográfica con reconocimiento de la fuente. This document is part of the doctoral theses collection of the Central Library Dr. Luis Federico Leloir, available in digital.bl.fcen.uba.ar. It should be used accompanied by the corresponding citation acknowledging the source. Cita tipo APA: Iglesia Llanos, María Paula. (1997). Magnetoestratigrafía y paleomagnetismo del Jurásico Inferior marino de la Cuenca Neuquina, República Argentina. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. http://digital.bl.fcen.uba.ar/Download/Tesis/Tesis_2962_IglesiaLlanos.pdf Cita tipo Chicago: Iglesia Llanos, María Paula. "Magnetoestratigrafía y paleomagnetismo del Jurásico Inferior marino de la Cuenca Neuquina, República Argentina". Tesis de Doctor. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 1997. http://digital.bl.fcen.uba.ar/Download/Tesis/Tesis_2962_IglesiaLlanos.pdf Dirección: Biblioteca Central Dr. Luis F. Leloir, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Contacto: [email protected] Intendente Güiraldes 2160 - C1428EGA - Tel. (++54 +11) 4789-9293 Magnetoestratigrafía y Paleomagnetismo del Jurásico Inferior marino de la Cuenca Neuquina, República Argentina Tesis Doctoral en Ciencias Geológicas Autora: María Paula Iglesia Llanos Director: Haroldo Vizán UNIVERSIDAD DE BUENOS AIRES Facultad de Ciencias Exactas y Naturales D artamento de Ciencias Geoló icas ¡_ °p g Qeal“ oq 62/ Año:1997 ól l k A mispadres Maria Paula Iglesia Llanos “Magnetoesrraligrafia y Paleomagnerismodel Jurásico Irfizrior.. -
Revised Stratigraphic Range of the Toarcian Ammonite Genus Porpoceras Buckman, 1911
Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2016 Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911 Jattiot, Romain ; Fara, Emmanuel ; Brayard, Arnaud ; Vennin, Emmanuelle Abstract: The Toarcian ammonite genus Porpoceras Buckman, 1911 is a cosmopolitan taxon with an uncertain stratigraphic range. The oldest known occurrence of the genus was reported from the Falciferum Subzone (Early Toarcian) in Morocco, although based on a unique specimen whose taxonomic assignment to the genus Porpoceras remains doubtful. The youngest occurrence was a simple mention of Porpoceras sp. from the Variabilis Subzone (Middle Toarcian) of the Thouars area (Western France), but it was later regarded as doubtful because no specimen was figured. We here provide the first robust evidence forthe youngest known occurrence of the genus Porpoceras, from the Variabilis Subzone of the Thouars area. The known revised stratigraphic range of the genus therefore extends from the Falciferum Subzone to the Variabilis Subzone. In turn, the genus Porpoceras likely went extinct in the Illustris Subzone together with the genera Catacoeloceras Buckman, 1923 and Mucrodactylites Buckman, 1928, coinciding with the drastic loss of diversity observed between the Bifrons and Variabilis Zones in northwestern Europe (also known as the Bifrons-Variabilis extinction). Finally, in the light of our new data and of previous reports, the genus Porpoceras is not a foolproof biostratigraphic marker of the NW European Bifrons Horizon, although it remains an important taxon for identifying this biostratigraphic unit. DOI: https://doi.org/10.5252/g2016n4a3 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-131844 Journal Article Published Version Originally published at: Jattiot, Romain; Fara, Emmanuel; Brayard, Arnaud; Vennin, Emmanuelle (2016). -
Publikationen Mit Beteiligung Von Mitgliedern Der SKJ Im Druck
Publikationen mit Beteiligung von Mitgliedern der SKJ im Druck Audo, D., Schweigert, G. & Charbonnier, S. (im Druck): Proeryon, the most widespread and long‐lived genus of Polychelidan lobsters. – Annales de Paléontologie Kutz, M., Dietze, V. & Franz, M. (im Druck): Neue Ammonitenfunde aus der Hauptrogenstein‐ Formation (Mittlerer Jura) vom Tuniberg (Oberrheingraben, SW‐Deutschland). – Jahresberichte und Mitteilungen des oberrheinischen geologischen Vereins Dietze, V. & Schweigert, G. (im Druck): Zwei exotische Ammoniten aus dem Ober‐Aalenium (Mittlerer Jura) von Blumberg‐Achdorf (SW‐Deutschland). – Jahreshefte der Gesellschaft für Naturkunde in Württemberg. Dietze, V., Wannenmacher, N. & Schweigert, G. (im Druck): Die Sauzei‐Zone (Mitteljura, Unter‐Bajocium) im Gebiet des Hohenzollern (Schwäbische Alb, SW‐Deutschland). – Zitteliana Schweigert, G., Scherzinger, A. & Lehmkuhl, A. (2020): Eine „verlorene Formation“ – die jüngsten Weißjura‐Relikte der Schwäbischen Alb. – Jahresberichte und Mitteilungen des oberrheinischen geologischen Vereins 2019 Audo, D. & Schweigert, G. (2019): Das Meereskrokodil Pelagosaurus – Kronjuwel einer Fossiliensammlung. – Fossilien, 36 (1): 4‐7. Dietl, G. (2019): Die Ammonitenfauna der Medea‐Subzone (untere Jason‐Zone, Mittel‐ Callovium) aus dem Ornatenton, mittlere Schwäbische Alb, SW‐Deutschland. – Jh. Ges. Naturkde. Württemberg, 175: 129‐148. Dietl, G. & Niederhöfer, H.‐J. (2019): Ein weiterer Beleg für die Medea‐Subzone (untere Jason‐ Zone, Mittel‐Callovium), und zwar aus dem Wartenbergoolith von Geisingen a. d. Donau, ‐ Jh. Ges. Naturkde. Württemberg, 175: 149‐ 158. Dietze, V. & Wannenmacher, N. (2019): Eine Emileia von der Zollernalb – vom Fund zum wissenschaftlichen Beleg. ‐ Fossilien, 36(1): 44–47. Dietze, V. & Hillebrandt, A. (2019): Lower Bajocian (Middle Jurassic) Ammonites of the Manflas area in Atacama Province, Northern Chile, Part 2: Giebeli Zone. ‐ Zitteliana, 93: 25– 46; München. -
Revised Stratigraphic Range of the Toarcian Ammonite Genus Porpoceras Buckman, 1911
Revised stratigraphic range of the Toarcian ammonite genus Porpoceras Buckman, 1911 Romain JATTIOT Paläontologisches Institut und Museum, Universität Zürich, Karl-Schmid Strasse 4, CH-8006 Zürich (Switzerland) and UMR CNRS 6282 Biogéosciences, Université Bourgogne Franche-Comté, 6 Boulevard Gabriel, F-21000 Dijon (France) [email protected] Emmanuel FARA Arnaud BRAYARD Emmanuelle VENNIN UMR CNRS 6282 Biogéosciences, Université Bourgogne Franche-Comté, 6 Boulevard Gabriel, F-21000 Dijon (France) [email protected] [email protected] [email protected] Published on 30 December 2016 urn:lsid:zoobank.org:pub:BC8394F4-9DF1-458A-B9A1-4293D82962EE Jattiot R., Fara E., Brayard A. & Vennin E. 2016. — Revised stratigraphic range of the Toarcian ammonite genus Por- poceras Buckman, 1911. Geodiversitas 38 (4): 505-513. https://doi.org/10.5252/g2016n4a3 ABSTRACT Th e Toarcian ammonite genus Porpoceras Buckman, 1911 is a cosmopolitan taxon with an uncertain stratigraphic range. Th e oldest known occurrence of the genus was reported from the Falciferum Subzone (Early Toarcian) in Morocco, although based on a unique specimen whose taxonomic assignment to the genus Porpoceras remains doubtful. Th e youngest occurrence was a simple mention of Porpoceras sp. from the Variabilis Subzone (Middle Toarcian) of the Th ouars area (Western France), but it was later regarded as doubtful because no specimen was fi gured. We here provide the fi rst robust evidence for the youngest known occurrence of the genus Porpoceras, from the Variabilis Subzone of the Th ouars area. Th e known revised stratigraphic range of the genus therefore extends from the Falciferum Subzone to the Variabilis Subzone. -
Lower Toarcian \(Jurassic\) Ammonites of the South Riffian
This article was downloaded by: [105.157.130.154] On: 22 August 2014, At: 10:55 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Journal of Systematic Palaeontology Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tjsp20 Lower Toarcian (Jurassic) ammonites of the South Riffian ridges (Morocco): systematics and biostratigraphy Jérémie Bardina, Isabelle Rougeta, Mohamed Benzaggaghb, Franz Theodor Fürsichc & Fabrizio Ceccaa a Sorbonne Universités, UPMC Université Paris 06, CR2P-UMR 7207 CNRS, MNHN, 4 Place Jussieu, F-75005, Paris, France b Département de Géologie, Université Moulay Ismail, Faculté des Sciences, BP 11201, Beni M’Hamed, Meknès, Morocco c Fachgruppe Paläoumwelt, GeoZentrum Nordbayern, FAU Erlangen-Nürnberg, Loewenichstrasse 28, D 91054 Erlangen, Germany Published online: 20 Aug 2014. To cite this article: Jérémie Bardin, Isabelle Rouget, Mohamed Benzaggagh, Franz Theodor Fürsich & Fabrizio Cecca (2014): Lower Toarcian (Jurassic) ammonites of the South Riffian ridges (Morocco): systematics and biostratigraphy, Journal of Systematic Palaeontology, DOI: 10.1080/14772019.2014.937204 To link to this article: http://dx.doi.org/10.1080/14772019.2014.937204 PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis.