DOCSLIB.ORG

(2016). Ichthyosaurs of the British Middle and Upper Jurassic. Part 1 - Ophthalmosaurus

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
(2016). Ichthyosaurs of the British Middle and Upper Jurassic. Part 1 - Ophthalmosaurus Moon, B. C. , & Kirton, A. M. (2016). Ichthyosaurs of the British Middle and Upper Jurassic. Part 1 - Ophthalmosaurus. Monograph of the Palaeontographical Society, 170(647), 1-84. http://www.palaeosoc.org/site/shop/monographs/issue:647/ Peer reviewed version License (if available): Unspecified Link to publication record in Explore Bristol Research PDF-document This is the author accepted manuscript (AAM). The final published version (version of record) is available online via the Paleontographical Society at http://www.palaeosoc.org/site/shop/monographs/issue:647/. Please refer to any applicable terms of use of the publisher. University of Bristol - Explore Bristol Research General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/red/research-policy/pure/user-guides/ebr-terms/ ICHTHYOSAURS OF THE BRITISH MIDDLE AND UPPER JURASSIC BENJAMIN C. MOON & ANGELA M. KIRTON PART 1, OPHTHALMOSAURUS Pages 1–XXX; Plates 1–30 PALAEONTOGRAPHICAL SOCIETY Month 2016 1 (FOR SPINE) Publication no. 647 ICHTHYOSAURS OF THE BRITISH MIDDLE AND UPPER JURASSIC. PART 1. OPHTHALMOSAURUS BENJAMIN C. MOON & ANGELA M. KIRTON 2016 2 MONOGRAPH OF THE PALAEONTOGRAPHICAL SOCIETY ICHTHYOSAURS OF THE BRITISH MIDDLE AND UPPER JURASSIC BENJAMIN C. MOON & ANGELA M. KIRTON PART 1, OPHTHALMOSAURUS Pages 1–XXX; Plates 1–30 © THE PALAEONTOGRAPHICAL SOCIETY, LONDON Month 2016 3 The Palaeontographical Society issues an annual volume of serially numbered publications; these may either be a single complete monograph or part of a continuing monograph. Publication No. 647, issued as part of Volume 170 for 2016 ISSN 0269–3445 Recommended reference to this publication: MOON, B. C. & KIRTON, A. M. 2016. Ichthyosaurs of the British Middle and Upper Jurassic. PART 1. Ophthalmosaurus. Monograph of the Palaeontographical Society, London: 1– XXX; pls 1–30. (Publ. No. 647, part of Vol. 170 for 2016). ABSTRACT The ichthyosaur material of the British Middle and Upper Jurassic referable to Ophthalmosaurus icenicus (Ichthyosauria: Ophthalmosauridae) is revisited and re- described; this is the most completely known post-Liassic British ichthyosaur. Much of this material derives from the Callovian Oxford Clay Formation, particularly from the Peterborough Area of Cambridgeshire, UK, deposited in the Leeds Collections. Pre- Callovian ichthyosaur remains are infrequent, incomplete, and non-diagnostic. Material 4 referred to Ophthalmosaurus icenicus shows high variability in the extent of ossification. Based on examination of the type and referred material, Ophthalmosaurus monocharactus, and Ophthalmosaurus pleydelli are rejected as junior subjective synonyms of Ophthalmosaurus icenicus due to a lack of diagnostic characters and pathology of specimens. Ichthyosaurus megalodeirus is rejected as a nomen nudum and the type material is referred to Ophthalmosaurus icenicus. Ophthalmosaurus icenicus is considered a separate species from Ophthalmosaurus natans based on several autapomorphies, but requires re-evaluation of the material. Les ichtyosaures du jurassique moyen et supérieur britannique. 1ère Partie. Ophthalmosaurus RÉSUMÉ Le matériel d’ichtyosaure du jurassique moyen et supérieur britannique attribuable à Ophthalmosaurus icenicus (Ichthyosauria : Ophthalmosauridae) est révisé et re-décrit ; c’est l’ichtyosaure post-liassique britannique le plus complet connu. La plus grande partie du matériel provient de la formation Oxford Clay (Callovien), et particulièrement de la région de Peterborough dans le Cambridgeshire, Royaume-Uni, et est entreposé dans les collections de Leeds. Les restes d’ichtyosaures pré-calloviens sont peu fréquents, incomplets, et non diagnostiques. Le matériel attribué à Ophthalmosaurus icenicus montre que l’extension de l’ossification est très variable. L’examen du matériel type permet de rejeter Ophthalmosaurus monocharactus, et Ophthalmosaurus pleydelli comme synonymes subjectifs plus récents de Ophthalmosaurus icenicus, basé sur un 5 manque de caractères diagnostiques et de pathologie des spécimens. Ichthyosaurus megalodeirus est rejeté comme nomen nudum et le matériel type est attribué à Ophthalmosaurus icenicus. Ophthalmosaurus icenicus est considéré une espèce séparée de Ophthalmosaurus natans basé sur plusieurs autapomorphies, cependant, une révision du matériel est nécessaire. [Translation by Yves Candela.] TITLE IN GERMANIchthyosaurier des britischen Mittel- und Oberjura. Erster Teil: Formatted: German (Germany) Ophthalmosaurus Formatted: Font: Italic, German (Germany) Formatted: German (Germany) ZUSAMMENFASSUNG In dieser Arbeit werden die Funde von Ichthyosauriern des britischen Mittel- und Oberjura, welche Ophthalmosaurus icenicus (Ichthyosaurier: Ophthalmosaurus) zuzuordnen sind, überarbeitet und neu beschrieben; hierbei handelt es sich um den vollständigsten bekannten britischen Ichthyosaurier des Postlias. Ein Großteil dieses Materials stammt aus der Callovium Oxford Tonformation, insbesondere aus der Umgebung von Peterborough in Cambridgeshire, Großbritannien, und ist Bestandteil der Leeds-Sammlungen. Vorhandene Funde von Ichthyosauriern des Präcallovium sind selten, unvollständig und nicht diagnostisch. Das Verknöcherungsausmaß der als Ophthalmosaurus icenicus bezeichneten Exemplare weist eine hohe Variabilität auf. Basierend auf der Untersuchung des Typus und der zugeordneten Funde werden Ophthalmosaurus monocharactus und Ophthalmosaurus Pleydell aufgrund des Mangels an diagnostischen Merkmalen, sowie der Pathologie der Exemplare als jüngere subjektive 6 Synonyme für Ophthalmosaurus icenicus abgelehnt. Ichthyosaurus megalodeirus wird als Nomen nudum abgelehnt, und die Funde des Typus werden als Ophthalmosaurus icenicus bezeichnet. Aufgrund mehrerer Autapomorphien wird Ophthalmosaurus icenicus einer anderen Art als Ophthalmosaurus natans zugeordnet; allerdings erfordert dies eine erneute Bewertung der Funde. [Translation by David Schlaphorst.] Ихтиозавры среднего и верхнего британского юрского периода. Часть первая: Formatted: Russian Ophthalmosaurus TITLE IN RUSSIAN Formatted: Font: Italic, Russian Formatted: Russian АБСТРАКТ Ихтиозавровые материалы среднего и верхнего британского юрского периода, Formatted: Russian относящие Ophthalmosaurus icenicus (Ichthyosauria: Ophthalmosauridae) Formatted: Font: Italic, Russian Formatted: Russian возвращаются к рассмотрению и снова описывается; это – наиболее полно известный британский динозавр с отдела лейас. Большая часть таких материалы, которая находится в Лидских коллекциях, происходит из келловейского оксфордского глинообразования и особенно из района Петерборо в Кембриджшире, в Великобританий. Докелловейские останки ихтиозавров являются редкими, неполными, и недиагностическими. Материалы, относящие Formatted: Font: Italic, Russian Ophthalmosaurus icenicus проявляют высокую ступень изменчивости насчёт Formatted: Russian Formatted: Font: Italic, Russian степени оссификации. На основе изучении типа и относящих материалов, Formatted: Russian Formatted: Font: Italic, Russian Ophthalmosaurus monocharactus и Ophthalmosaurus pleydelli отклоняются как Formatted: Russian Formatted: Font: Italic, Russian младшие субъективные синонимы Ophthalmosaurus icenicus из-за недостатка Formatted: Russian 7 диагностических характеров и патологии экземпляров. Ichthyosaurus megalodeirus Formatted: Font: Italic, Russian Formatted: Russian отклоняется в качестве nomen nudum и материалы относятся к Ophthalmosaurus Formatted: Font: Italic, Russian icenicus. Ophthalmosaurus icenicus считается как отдельный вид от Ophthalmosaurus Formatted: Russian Formatted: Font: Italic, Russian natans на основе несколько аутапоморфий, но дополнительная оценка материалов Formatted: Russian Formatted: Font: Italic, Russian нужна. [Translation by Anastasia Reynolds.] Formatted: Russian Edited by Y. Candela Made and printed in Great Britain Origination by Michael Heath Print, Biggin Hill TN16 3UN 8 ICHTHYOSAURS OF THE BRITISH MIDDLE AND UPPER JURASSIC. PART 1. OPHTHALMOSAURUS CONTENTS Page INTRODUCTION ABBREVIATIONS HISTORY OF RESEARCH STRATIGRAPHY MATERIALS AND METHODS SYSTEMATIC PALAEONTOLOGY TAXA VALIDA NEOICHTHYOSAURIA Sander, 2000 OPHTHALMOSAURIDAE Baur, 1887a [Fischer et al., 2011] Genus Ophthalmosaurus Seeley, 1874b Premaxilla Maxilla Nasal Lachrymal External naris Prefrontal Frontal Parietal 9 Postfrontal Supratemporal Squamosal Postorbital Quadratojugal Jugal Orbit Sclerotic plates Vomer Palatine Epipterygoid Pterygoid Quadrate Parabasisphenoid Prootic Opisthotic Supraoccipital Exoccipital Basioccipital Stapes Dentary Splenial Surangular 10 Angular Coronoid Prearticular Articular Dentition Hyoid apparatus Atlas-axis complex Vertebral column Presacral vertebrae Caudal vertebrae Ribs Gastralia Pectoral girdle Clavicle Interclavicle Coracoid Scapula Forelimb Humerus Forelimb epipodials Carpals Metacarpals Primary forelimb digits 11 Accessory forelimb digits and elements Pelvic girdle Ilium Ischiopubis Hindlimb Femur Hindlimb epipodials Distal hindlimb elements ACKNOWLEDGEMENTS REFERENCES APPENDIX 12 INTRODUCTION Ichthyosaur specimens are, relatively speaking, not uncommon in the Middle and Upper Jurassic of the UK. Indeed, in some horizons they may form the majority of large vertebrate remains found. Despite this, these later ichthyosaurs have often been sidelined because of the greater attention paid to the more spectacular Lias Group fossils found so abundantly along the Dorset and Yorkshire
Load more

Recommended publications
  • Resetting the Evolution of Marine Reptiles at the Triassic-Jurassic Boundary
    Resetting the evolution of marine reptiles at the Triassic-Jurassic boundary Philippa M. Thorne, Marcello Ruta, and Michael J. Benton1 School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom Edited by Neil Shubin, University of Chicago, Chicago, IL, and accepted by the Editorial Board March 30, 2011 (received for review December 18, 2010) Ichthyosaurs were important marine predators in the Early Jurassic, life, swimming with lateral undulations of the tail and steering and an abundant and diverse component of Mesozoic marine with elongate fore paddles and producing live young at sea. ecosystems. Despite their ecological importance, however, the After the Tr-J bottleneck, ichthyosaurs apparently did not Early Jurassic species represent a reduced remnant of their former achieve such diversity of form but nonetheless recovered suffi- significance in the Triassic. Ichthyosaurs passed through an evolu- ciently to be the dominant marine predators of the Early Ju- tionary bottleneck at, or close to, the Triassic-Jurassic boundary, rassic, after which they dwindled in diversity through the Middle which reduced their diversity to as few as three or four lineages. and Late Jurassic and much of the Cretaceous until they dis- Diversity bounced back to some extent in the aftermath of the appeared at the end of the Cenomanian, ∼100 Ma, after having end-Triassic mass extinction, but disparity remained at less than had a significant role in Mesozoic seas for 150 Myr. one-tenth of pre-extinction levels, and never recovered. The group In this study, we concentrate on disparity (morphological fi remained at low diversity and disparity for its nal 100 Myr.
    [Show full text]
  • First Occurrence of a Gigantic Pliosaurid Plesiosaur in The
    Bull. Soc. géol. Fr., 2003, t. 174, no 3, pp. 271-278 First occurrence of a gigantic pliosaurid plesiosaur in the late Jurassic (Kimmeridgian) of Mexico MARIE-CÉLINE BUCHY1,EBERHARD FREY2,WOLFGANG STINNESBECK1 &JOSÉ GUADALUPE LÓPEZ-OLIVA3 Key words. – Kimmeridgian, Pliosauridae, Mexico, Palaeobiogeography. Abstract. – Reinvestigation of a partial vertebral column from the Kimmeridgian La Caja Formation of Mexico, housed in the University of Linares (Mexico), and previously attributed to a dinosaur, proves to be from a very large pliosaurid plesiosaur. This specimen represents the first plesiosaur described from the Jurassic of Mexico. Its length has been esti- mated at 15 metres and, as a juvenile, is considered to be one of the largest Jurassic marine reptiles. The remains of this animal are here described. The morphology of the vertebral column is not diagnostic beyond family level. Large pliosaur vertebrae of a similar size are known from the Upper Jurassic of Europe, and are often referred to the genera Liopleurodon or Simolestes but these identifications are based only upon the size of the centra and have no taxonomic justification. A portion of rostrum with teeth was discovered together with the vertebral column but is unfortunately now lost. The Mexican pliosaur fills geographical and chronological gaps between western Tethys and South American pliosaurs, and is an additional support to the hypothesis of a Hispanic corridor linking at least temporarily the NW Euro- pean marine province with the western South American marine (Pacific) realm during the late Jurassic. Première occurrence d’un plésiosaure pliosauride géant dans le Jurassique supérieur (Kimméridgien) du Mexique Mots clés.
    [Show full text]
  • Cryptoclidid Plesiosaurs (Sauropterygia, Plesiosauria) from the Upper Jurassic of the Atacama Desert
    Journal of Vertebrate Paleontology ISSN: (Print) (Online) Journal homepage: https://www.tandfonline.com/loi/ujvp20 Cryptoclidid plesiosaurs (Sauropterygia, Plesiosauria) from the Upper Jurassic of the Atacama Desert Rodrigo A. Otero , Jhonatan Alarcón-Muñoz , Sergio Soto-Acuña , Jennyfer Rojas , Osvaldo Rojas & Héctor Ortíz To cite this article: Rodrigo A. Otero , Jhonatan Alarcón-Muñoz , Sergio Soto-Acuña , Jennyfer Rojas , Osvaldo Rojas & Héctor Ortíz (2020): Cryptoclidid plesiosaurs (Sauropterygia, Plesiosauria) from the Upper Jurassic of the Atacama Desert, Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2020.1764573 To link to this article: https://doi.org/10.1080/02724634.2020.1764573 View supplementary material Published online: 17 Jul 2020. Submit your article to this journal Article views: 153 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=ujvp20 Journal of Vertebrate Paleontology e1764573 (14 pages) © by the Society of Vertebrate Paleontology DOI: 10.1080/02724634.2020.1764573 ARTICLE CRYPTOCLIDID PLESIOSAURS (SAUROPTERYGIA, PLESIOSAURIA) FROM THE UPPER JURASSIC OF THE ATACAMA DESERT RODRIGO A. OTERO,*,1,2,3 JHONATAN ALARCÓN-MUÑOZ,1 SERGIO SOTO-ACUÑA,1 JENNYFER ROJAS,3 OSVALDO ROJAS,3 and HÉCTOR ORTÍZ4 1Red Paleontológica Universidad de Chile, Laboratorio de Ontogenia y Filogenia, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago, Chile, [email protected]; 2Consultora Paleosuchus Ltda., Huelén 165, Oficina C, Providencia, Santiago, Chile; 3Museo de Historia Natural y Cultural del Desierto de Atacama. Interior Parque El Loa s/n, Calama, Región de Antofagasta, Chile; 4Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Barrio Universitario, Concepción, Región del Bío Bío, Chile ABSTRACT—This study presents the first plesiosaurs recovered from the Jurassic of the Atacama Desert that are informative at the genus level.
    [Show full text]
  • A Revision of the Classification of the Plesiosauria with a Synopsis of the Stratigraphical and Geographical Distribution Of
    LUNDS UNIVERSITETS ARSSKRIFT. N. F. Avd. 2. Bd 59. Nr l. KUNGL. FYSIOGRAFISKA SÅLLSKAPETS HANDLINGAR, N. F. Bd 74. Nr 1. A REVISION OF THE CLASSIFICATION OF THE PLESIOSAURIA WITH A SYNOPSIS OF THE STRATIGRAPHICAL AND GEOGRAPHICAL DISTRIBUTION OF THE GROUP BY PER OVE PERSSON LUND C. W. K. GLEER UP Read before the Royal Physiographic Society, February 13, 1963. LUND HÅKAN OHLSSONS BOKTRYCKERI l 9 6 3 l. Introduction The sub-order Plesiosauria is one of the best known of the Mesozoic Reptile groups, but, as emphasized by KuHN (1961, p. 75) and other authors, its classification is still not satisfactory, and needs a thorough revision. The present paper is an attempt at such a revision, and includes also a tabular synopsis of the stratigraphical and geo­ graphical distribution of the group. Some of the species are discussed in the text (pp. 17-22). The synopsis is completed with seven maps (figs. 2-8, pp. 10-16), a selective synonym list (pp. 41-42), and a list of rejected species (pp. 42-43). Some forms which have been erroneously referred to the Plesiosauria are also briefly mentioned ("Non-Plesiosaurians", p. 43). - The numerals in braekets after the generic and specific names in the text refer to the tabular synopsis, in which the different forms are numbered in successional order. The author has exaroined all material available from Sweden, Australia and Spitzbergen (PERSSON 1954, 1959, 1960, 1962, 1962a); the major part of the material from the British Isles, France, Belgium and Luxembourg; some of the German spec­ imens; certain specimens from New Zealand, now in the British Museum (see LYDEK­ KER 1889, pp.
    [Show full text]
  • 71St Annual Meeting Society of Vertebrate Paleontology Paris Las Vegas Las Vegas, Nevada, USA November 2 – 5, 2011 SESSION CONCURRENT SESSION CONCURRENT
    ISSN 1937-2809 online Journal of Supplement to the November 2011 Vertebrate Paleontology Vertebrate Society of Vertebrate Paleontology Society of Vertebrate 71st Annual Meeting Paleontology Society of Vertebrate Las Vegas Paris Nevada, USA Las Vegas, November 2 – 5, 2011 Program and Abstracts Society of Vertebrate Paleontology 71st Annual Meeting Program and Abstracts COMMITTEE MEETING ROOM POSTER SESSION/ CONCURRENT CONCURRENT SESSION EXHIBITS SESSION COMMITTEE MEETING ROOMS AUCTION EVENT REGISTRATION, CONCURRENT MERCHANDISE SESSION LOUNGE, EDUCATION & OUTREACH SPEAKER READY COMMITTEE MEETING POSTER SESSION ROOM ROOM SOCIETY OF VERTEBRATE PALEONTOLOGY ABSTRACTS OF PAPERS SEVENTY-FIRST ANNUAL MEETING PARIS LAS VEGAS HOTEL LAS VEGAS, NV, USA NOVEMBER 2–5, 2011 HOST COMMITTEE Stephen Rowland, Co-Chair; Aubrey Bonde, Co-Chair; Joshua Bonde; David Elliott; Lee Hall; Jerry Harris; Andrew Milner; Eric Roberts EXECUTIVE COMMITTEE Philip Currie, President; Blaire Van Valkenburgh, Past President; Catherine Forster, Vice President; Christopher Bell, Secretary; Ted Vlamis, Treasurer; Julia Clarke, Member at Large; Kristina Curry Rogers, Member at Large; Lars Werdelin, Member at Large SYMPOSIUM CONVENORS Roger B.J. Benson, Richard J. Butler, Nadia B. Fröbisch, Hans C.E. Larsson, Mark A. Loewen, Philip D. Mannion, Jim I. Mead, Eric M. Roberts, Scott D. Sampson, Eric D. Scott, Kathleen Springer PROGRAM COMMITTEE Jonathan Bloch, Co-Chair; Anjali Goswami, Co-Chair; Jason Anderson; Paul Barrett; Brian Beatty; Kerin Claeson; Kristina Curry Rogers; Ted Daeschler; David Evans; David Fox; Nadia B. Fröbisch; Christian Kammerer; Johannes Müller; Emily Rayfield; William Sanders; Bruce Shockey; Mary Silcox; Michelle Stocker; Rebecca Terry November 2011—PROGRAM AND ABSTRACTS 1 Members and Friends of the Society of Vertebrate Paleontology, The Host Committee cordially welcomes you to the 71st Annual Meeting of the Society of Vertebrate Paleontology in Las Vegas.
    [Show full text]
  • Mesozoic Marine Reptile Palaeobiogeography in Response to Drifting Plates
    ÔØ ÅÒÙ×Ö ÔØ Mesozoic marine reptile palaeobiogeography in response to drifting plates N. Bardet, J. Falconnet, V. Fischer, A. Houssaye, S. Jouve, X. Pereda Suberbiola, A. P´erez-Garc´ıa, J.-C. Rage, P. Vincent PII: S1342-937X(14)00183-X DOI: doi: 10.1016/j.gr.2014.05.005 Reference: GR 1267 To appear in: Gondwana Research Received date: 19 November 2013 Revised date: 6 May 2014 Accepted date: 14 May 2014 Please cite this article as: Bardet, N., Falconnet, J., Fischer, V., Houssaye, A., Jouve, S., Pereda Suberbiola, X., P´erez-Garc´ıa, A., Rage, J.-C., Vincent, P., Mesozoic marine reptile palaeobiogeography in response to drifting plates, Gondwana Research (2014), doi: 10.1016/j.gr.2014.05.005 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPT Mesozoic marine reptile palaeobiogeography in response to drifting plates To Alfred Wegener (1880-1930) Bardet N.a*, Falconnet J. a, Fischer V.b, Houssaye A.c, Jouve S.d, Pereda Suberbiola X.e, Pérez-García A.f, Rage J.-C.a and Vincent P.a,g a Sorbonne Universités CR2P, CNRS-MNHN-UPMC, Département Histoire de la Terre, Muséum National d’Histoire Naturelle, CP 38, 57 rue Cuvier,
    [Show full text]
  • Ichthyosaur Species Valid Taxa Acamptonectes Fischer Et Al., 2012: Acamptonectes Densus Fischer Et Al., 2012, Lower Cretaceous, Eng- Land, Germany
    Ichthyosaur species Valid taxa Acamptonectes Fischer et al., 2012: Acamptonectes densus Fischer et al., 2012, Lower Cretaceous, Eng- land, Germany. Aegirosaurus Bardet and Fernández, 2000: Aegirosaurus leptospondylus (Wagner 1853), Upper Juras- sic–Lower Cretaceous?, Germany, Austria. Arthropterygius Maxwell, 2010: Arthropterygius chrisorum (Russell, 1993), Upper Jurassic, Canada, Ar- gentina?. Athabascasaurus Druckenmiller and Maxwell, 2010: Athabascasaurus bitumineus Druckenmiller and Maxwell, 2010, Lower Cretaceous, Canada. Barracudasauroides Maisch, 2010: Barracudasauroides panxianensis (Jiang et al., 2006), Middle Triassic, China. Besanosaurus Dal Sasso and Pinna, 1996: Besanosaurus leptorhynchus Dal Sasso and Pinna, 1996, Middle Triassic, Italy, Switzerland. Brachypterygius Huene, 1922: Brachypterygius extremus (Boulenger, 1904), Upper Jurassic, Engand; Brachypterygius mordax (McGowan, 1976), Upper Jurassic, England; Brachypterygius pseudoscythius (Efimov, 1998), Upper Jurassic, Russia; Brachypterygius alekseevi (Arkhangelsky, 2001), Upper Jurassic, Russia; Brachypterygius cantabridgiensis (Lydekker, 1888a), Lower Cretaceous, England. Californosaurus Kuhn, 1934: Californosaurus perrini (Merriam, 1902), Upper Triassic USA. Callawayia Maisch and Matzke, 2000: Callawayia neoscapularis (McGowan, 1994), Upper Triassic, Can- ada. Caypullisaurus Fernández, 1997: Caypullisaurus bonapartei Fernández, 1997, Upper Jurassic, Argentina. Chaohusaurus Young and Dong, 1972: Chaohusaurus geishanensis Young and Dong, 1972, Lower Trias- sic, China.
    [Show full text]
  • Redalyc.Salinites Grossicostatum (Imlay, 1939) and S. Finicostatum Sp. Nov. from the Latest Tithonian (Late Jurassic) of Northea
    Boletín de la Sociedad Geológica Mexicana ISSN: 1405-3322 [email protected] Sociedad Geológica Mexicana, A.C. México Zell, Patrick; Stinnesbeck, Wolfgang Salinites grossicostatum (Imlay, 1939) and S. finicostatum sp. nov. from the latest Tithonian (Late Jurassic) of northeastern Mexico Boletín de la Sociedad Geológica Mexicana, vol. 68, núm. 2, 2016, pp. 305-311 Sociedad Geológica Mexicana, A.C. Distrito Federal, México Available in: http://www.redalyc.org/articulo.oa?id=94346152007 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Salinites grossicostatum and S. finicostatum sp. nov. from the latest Tithonian of northeastern Mexico 305 Boletín de la Sociedad Geológica Mexicana Volumen 68, núm. 2, 2016, p. 305-311 D GEOL DA Ó E G I I C C O A S 1904 M 2004 . C EX . ICANA A C i e n A ñ o s Salinites grossicostatum (Imlay, 1939) and S. finicostatum sp. nov. from the latest Tithonian (Late Jurassic) of northeastern Mexico Patrick Zell1,*, Wolfgang Stinnesbeck1 1 Institut für Geowissenschaften, Universität Heidelberg, Im Neuenheimer Feld 234, 69120 Heidelberg, Germany. * [email protected] Abstract Based on our taxonomic revision of the ammonite Salinites grossicostatum from the uppermost Tithonian of the La Caja Formation at Puerto Piñones, in the state of Coahuila, northeastern Mexico, we suggest that some specimens described from other Tithonian sites of Cuba and Mexico assigned to S. grossicostatum belong to a new species, here presented as S.
    [Show full text]
  • Palaeoecology and Palaeoenvironments of the Middle Jurassic to Lowermost Cretaceous Agardhfjellet Formation (Bathonian–Ryazanian), Spitsbergen, Svalbard
    NORWEGIAN JOURNAL OF GEOLOGY Vol 99 Nr. 1 https://dx.doi.org/10.17850/njg99-1-02 Palaeoecology and palaeoenvironments of the Middle Jurassic to lowermost Cretaceous Agardhfjellet Formation (Bathonian–Ryazanian), Spitsbergen, Svalbard Maayke J. Koevoets1, Øyvind Hammer1 & Crispin T.S. Little2 1Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, 0318 Oslo, Norway. 2School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom. E-mail corresponding author (Maayke J. Koevoets): [email protected] We describe the invertebrate assemblages in the Middle Jurassic to lowermost Cretaceous of the Agardhfjellet Formation present in the DH2 rock-core material of Central Spitsbergen (Svalbard). Previous studies of the Agardhfjellet Formation do not accurately reflect the distribution of invertebrates throughout the unit as they were limited to sampling discontinuous intervals at outcrop. The rock-core material shows the benthic bivalve fauna to reflect dysoxic, but not anoxic environments for the Oxfordian–Lower Kimmeridgian interval with sporadic monospecific assemblages of epifaunal bivalves, and more favourable conditions in the Volgian, with major increases in abundance and diversity of Hartwellia sp. assemblages. Overall, the new information from cores shows that abundance, diversity and stratigraphic continuity of the fossil record in the Upper Jurassic of Spitsbergen are considerably higher than indicated in outcrop studies. The inferred life positions and feeding habits of the benthic fauna refine our understanding of the depositional environments of the Agardhfjellet Formation. The pattern of occurrence of the bivalve genera is correlated with published studies of Arctic localities in East Greenland and northern Siberia and shows similarities in palaeoecology with the former but not the latter.
    [Show full text]
  • Records from the Aalenian–Bajocian of Patagonia (Argentina): an Overview
    Geol. Mag.: page 1 of 11. c Cambridge University Press 2013 1 doi:10.1017/S0016756813000058 Ophthalmosaurian (Ichthyosauria) records from the Aalenian–Bajocian of Patagonia (Argentina): an overview ∗ MARTA S. FERNÁNDEZ † & MARIANELLA TALEVI‡ ∗ División Palaeontología Vertebrados, Museo de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina. CONICET ‡Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, 8332 General Roca, Río Negro, Argentina. CONICET (Received 12 September 2012; accepted 11 January 2013) Abstract – The oldest ophthalmosaurian records worldwide have been recovered from the Aalenian– Bajocian boundary of the Neuquén Basin in Central-West Argentina (Mendoza and Neuquén provinces). Although scarce, they document a poorly known period in the evolutionary history of parvipelvian ichthyosaurs. In this contribution we present updated information on these fossils, including a phylogenetic analysis, and a redescription of ‘Stenopterygius grandis’ Cabrera, 1939. Patagonian ichthyosaur occurrences indicate that during the Bajocian the Neuquén Basin palaeogulf, on the southern margins of the Palaeopacific Ocean, was inhabited by at least three morphologically discrete taxa: the slender Stenopterygius cayi, robust ophthalmosaurian Mollesaurus periallus and another indeterminate ichthyosaurian. Rib bone tissue structure indicates that rib cages of Bajocian ichthyosaurs included forms with dense rib microstructure (Mollesaurus) and forms with an ‘osteoporotic-like’ pattern (Stenopterygius cayi). Keywords: Mollesaurus,‘Stenopterygius grandis’, Middle Jurassic, Neuquén Basin, Argentina. 1. Introduction all Callovian and post-Callovian ichthyosaurs, two different Early Jurassic taxa have been proposed as Ichthyosaurs were one of the main predators in the ophthalmosaurian sister taxa: Stenopterygius (Maisch oceans all over the world during most of the Mesozoic & Matzke, 2000; Sander, 2000; Druckenmiller & (Massare, 1987).
    [Show full text]
  • The Giant Pliosaurid That Wasn't—Revising the Marine Reptiles From
    The giant pliosaurid that wasn’t—revising the marine reptiles from the Kimmeridgian, Upper Jurassic, of Krzyżanowice, Poland DANIEL MADZIA, TOMASZ SZCZYGIELSKI, and ANDRZEJ S. WOLNIEWICZ Madzia, D., Szczygielski, T., and Wolniewicz, A.S. 2021. The giant pliosaurid that wasn’t—revising the marine reptiles from the Kimmeridgian, Upper Jurassic, of Krzyżanowice, Poland. Acta Palaeontologica Polonica 66 (1): 99–129. Marine reptiles from the Upper Jurassic of Central Europe are rare and often fragmentary, which hinders their precise taxonomic identification and their placement in a palaeobiogeographic context. Recent fieldwork in the Kimmeridgian of Krzyżanowice, Poland, a locality known from turtle remains originally discovered in the 1960s, has reportedly provided additional fossils thought to indicate the presence of a more diverse marine reptile assemblage, including giant pliosaurids, plesiosauroids, and thalattosuchians. Based on its taxonomic composition, the marine tetrapod fauna from Krzyżanowice was argued to represent part of the “Matyja-Wierzbowski Line”—a newly proposed palaeobiogeographic belt comprising faunal components transitional between those of the Boreal and Mediterranean marine provinces. Here, we provide a de- tailed re-description of the marine reptile material from Krzyżanowice and reassess its taxonomy. The turtle remains are proposed to represent a “plesiochelyid” thalassochelydian (Craspedochelys? sp.) and the plesiosauroid vertebral centrum likely belongs to a cryptoclidid. However, qualitative assessment and quantitative analysis of the jaws originally referred to the colossal pliosaurid Pliosaurus clearly demonstrate a metriorhynchid thalattosuchian affinity. Furthermore, these me- triorhynchid jaws were likely found at a different, currently indeterminate, locality. A tooth crown previously identified as belonging to the thalattosuchian Machimosaurus is here considered to represent an indeterminate vertebrate.
    [Show full text]
  • Platypterygius Australis: Understanding Its Taxonomy, Morphology, and Palaeobiology
    The Australian Cretaceous ichthyosaur Platypterygius australis: understanding its taxonomy, morphology, and palaeobiology MARIA ZAMMIT Environmental Biology School of Earth and Environmental Sciences The University of Adelaide South Australia A thesis submitted for the degree of Doctor of Philosophy at the University of Adelaide 10 January 2011 ~ 1 ~ TABLE OF CONTENTS CHAPTER 1 Introduction 7 1.1 The genus Platypterygius 7 1.2 Use of the Australian material 10 1.3 Aims and structure of the thesis 10 CHAPTER 2 Zammit, M. 2010. A review of Australasian ichthyosaurs. Alcheringa, 12 34:281–292. CHAPTER 3 Zammit, M., Norris, R. M., and Kear, B. P. 2010. The Australian 26 Cretaceous ichthyosaur Platypterygius australis: a description and review of postcranial remains. Journal of Vertebrate Paleontology, 30:1726–1735. Appendix I: Centrum measurements CHAPTER 4 Zammit, M., and Norris, R. M. An assessment of locomotory capabilities 39 in the Australian Early Cretaceous ichthyosaur Platypterygius australis based on functional comparisons with extant marine mammal analogues. CHAPTER 5 Zammit, M., and Kear, B. P. (in press). Healed bite marks on a 74 Cretaceous ichthyosaur. Acta Palaeontologica Polonica. CHAPTER 6 Concluding discussion 87 CHAPTER 7 References 90 APPENDIX I Zammit, M. (in press). Australasia’s first Jurassic ichthyosaur fossil: an 106 isolated vertebra from the lower Jurassic Arataura Formation of the North Island, New Zealand. Alcheringa. ~ 2 ~ ABSTRACT The Cretaceous ichthyosaur Platypterygius was one of the last representatives of the Ichthyosauria, an extinct, secondarily aquatic group of reptiles. Remains of this genus occur worldwide, but the Australian material is among the best preserved and most complete. As a result, the Australian ichthyosaur fossil finds were used to investigate the taxonomy, anatomy, and possible locomotory methods and behaviours of this extinct taxon.
    [Show full text]