DOCSLIB.ORG

Die Microsauria Des Mitteleuropäischen Rotliegend

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Die Microsauria Des Mitteleuropäischen Rotliegend Die Microsauria des mitteleuropäischen Rotliegend Dissertation zur Erlangung des Grades „Doktor der Naturwissenschaften" im Promotionsfach Geologie/Paläontologie am Fachbereich Chemie, Pharmazie und Geowissenschaften der Johannes Gutenberg-Universität in Mainz Sabine Glienke geb. in Worms Mainz, 2011 http://d-nb.info/1058187503 Inhalt Inhalt 1. Einleitung 6 1.1. Allgemeine Merkmale und Bearbeitungsgeschichte 6 1.2. Fundorte und Erhaltung 9 2. Methoden, Abkürzungen und Material 16 2.1. Methoden 16 2.1.1. Bearbeitung der Skelette 16 2.1.2. Gewinnung und Bearbeitung der Einzelknochen 16 2.1.3. Kladogramme 17 2.2. Abkürzungen 17 2.2.1. Sammlungen 17 2.2.2. In den Zeichnungen verwendete Abkürzungen 17 2.3. Übersicht über die untersuchten Skelette 19 3. Beschreibungen 21 3.1. Die Familie Brachystelechidae CARROLL& GASKILL, 1978 21 3.1.1. Systematische Stellung 21 3.1.2. Diagnose 21 3.2. Die Gattung Batropetes CARROLL & GASKILL, 1971 21 3.2.1. Systematische Stellung 21 3.2.2. Diagnose 22 3.2.3. Die vier Spezies der Gattung Batropetes 22 3.3. Batropetes niederkirchensis n. sp 26 3.3.1. Diagnose 26 3.3.2. Beschreibung 28 3.3.2.1. Schädel 28 3.3.2.1.1. Schädeldach 28 3.3.2.1.2. Gaumen 38 3.3.2.1.3. Hirnkapsel 43 3.3.2.1.4. Unterkiefer 46 3.3.2.2. Postcraniales Skelett 48 Inhalt 3.4. Batropetes palatinus n. sp 62 3.4.1. Diagnose 62 3.4.2. Beschreibung 63 3.4.2.1. Schädel 74 3.4.2.1.1. Schädeldach 74 3.4.2.1.2. Gaumen 88 3.4.2.1.3. Hirnkapsel 93 3.4.2.1.4. Unterkiefer 96 3.4.2.2. Postcraniales Skelett 101 3.5. Batropetes fritschi GEINITZ & DEICHMÜLLER, 1882 126 3.5.1. Diagnose 127 3.5.2. Beschreibung 127 3.5.2.1. Schädel 143 3.5.2.1.1. Schädeldach 143 3.5.2.1.2. Gaumen 154 3.5.2.1.3. Hirnkapsel 154 3.5.2.1.4. Unterkiefer 156 3.5.2.2. Postcraniales Skelett 158 3.6. Batropetes appelensis n. sp 172 3.6.1. Diagnose 172 3.6.2. Beschreibung 172 3.6.2.1. Schädel 174 3.6.2.1.1. Schädeldach 174 3.6.2.1.2. Gaumen 176 3.6.2.1.3. Hirnkapsel 177 3.6.2.1.4. Unterkiefer 178 3.6.2.2. Postcraniales Skelett 181 3.6.3. Ein weiteres ßatro/jetes-Exemplar (Batropetes cf. appelensis) 194 3.7. Altenglanerpeton n. gen 195 3.8. Altenglanerpeton schroederi n. sp 195 3.8.1. Diagnose 195 3.8.2. Beschreibung 197 3.8.2.1. Schädel 197 3.8.2.2. Postcraniales Skelett 205 Inhalt 4. Vergleiche 208 4.1. Unterschiede innerhalb der Gattung Batropetes 208 4.1.1. Schädeldach 208 4.1.2. Gaumen 210 4.1.3. Unterkiefer 212 4.1.4. Postcraniales Skelett 213 4.1.5. Übersicht der Unterschiede 219 4.1.6. Vergleich von Batropetes niederkirchensis mit den übrigen Ba- tropetes-Arten 221 4.1.7. Vergleich von Batropetes palatinus mit den übrigen Batropetes- Arten 223 4.1.8. Vergleich von Batropetes fritschi mit den übrigen Batropetes- Arten 224 4.1.9. Vergleich von Batropetes appelensis mit den übrigen Batropetes- Arten 225 4.2. Batropetes im Vergleich mit anderen Gattungen 226 4.2.1. Vergleich von Batropetes mit den übrigen Brachystelechidae (jCarrolla und Quasicaeciliä) 227 4.2.1.1. Vergleich von Batropetes mit Carrolla 229 4.2.1.2. Vergleich von Batropetes mit Quasicaecilia 231 4.2.2. Vergleich von Batropetes mit Saxonerpeton 234 4.3. Altenglanerpeton im Vergleich mit anderen Gattungen 237 4.3.1. Vergleich von Altenglanerpeton mit Rhynchonkos 237 4.3.2. Vergleich von Altenglanerpeton mit Pelodosotis 238 4.3.3. Vergleich von Altenglanerpeton mit den Gymnarthridae 240 4.3.4. Vergleich von Altenglanerpeton mit Crlnodon 240 4.3.5. Vergleich von Altenglanerpeton mit Asaphestera 242 4.3.6. Vergleich von Altenglanerpeton mit Micraroter 243 4.3.7. Vergleich von Altenglanerpeton mit Saxonerpeton 244 4.3.8. Vergleich von Altenglanerpeton mit Sauravus 245 4.3.8.1. Sauravus cambrayi 245 4.3.8.2. Sauravus costei 247 4.3.8.3. Vergleich 249 4.3.9. Vergleich von Altenglanerpeton mit Microbrachis 250 Inhalt 4.3.10.Spezifische Merkmale von Altenglanerpeton 252 4.4. Kladistische Analyse 253 4.4.1. Die Stellung der Brachystelechidae und des Altenglanerpeton in­ nerhalb der Lepospondyli 258 4.4.2. Brachystelechidae 266 4.4.3. Die unterschiedliche Anordnung der Brachystelechidae in den Kladogrammen 268 5. Vorkommen der Lepospondyli im saarpfälzischen Rotliegend 270 5.1. Stratigraphische Dokumentation 280 6. Lebensweise..., 282 6.1. Altenglanerpeton 283 6.2. Batropetes 285 7. Phylogenie 291 7.1. Altenglanerpeton 291 7.2. Batropetes und die Brachystelechidae 293 8. Ergebnisse 298 9. Literatur 302 Anhang 307 I. Übersicht über die Pfälzer Batropetes-Skelette 307 II. Übersicht über die Batropetes-Skelette aus Niederhäslich 312 III. Übersicht über Altenglanerpeton 316 IV. Messwerte der Pfälzer Batropetes-Skelette 317 V. Messwerte der Batropetes-Skelette aus Niederhäslich 321 VI. Messwerte von Altenglanerpeton 328 VII. Merkmale zur Erstellung des Kladogramms der Lepospondyli 329 VIII. Merkmale zur Erstellung des Kladogramms der Brachystelechidae 348 .
Load more

Recommended publications
  • Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha)
    Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha) by Richard Kissel A thesis submitted in conformity with the requirements for the degree of doctor of philosophy Graduate Department of Ecology & Evolutionary Biology University of Toronto © Copyright by Richard Kissel 2010 Morphology, Phylogeny, and Evolution of Diadectidae (Cotylosauria: Diadectomorpha) Richard Kissel Doctor of Philosophy Graduate Department of Ecology & Evolutionary Biology University of Toronto 2010 Abstract Based on dental, cranial, and postcranial anatomy, members of the Permo-Carboniferous clade Diadectidae are generally regarded as the earliest tetrapods capable of processing high-fiber plant material; presented here is a review of diadectid morphology, phylogeny, taxonomy, and paleozoogeography. Phylogenetic analyses support the monophyly of Diadectidae within Diadectomorpha, the sister-group to Amniota, with Limnoscelis as the sister-taxon to Tseajaia + Diadectidae. Analysis of diadectid interrelationships of all known taxa for which adequate specimens and information are known—the first of its kind conducted—positions Ambedus pusillus as the sister-taxon to all other forms, with Diadectes sanmiguelensis, Orobates pabsti, Desmatodon hesperis, Diadectes absitus, and (Diadectes sideropelicus + Diadectes tenuitectes + Diasparactus zenos) representing progressively more derived taxa in a series of nested clades. In light of these results, it is recommended herein that the species Diadectes sanmiguelensis be referred to the new genus
    [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]
  • Early Tetrapod Relationships Revisited
    Biol. Rev. (2003), 78, pp. 251–345. f Cambridge Philosophical Society 251 DOI: 10.1017/S1464793102006103 Printed in the United Kingdom Early tetrapod relationships revisited MARCELLO RUTA1*, MICHAEL I. COATES1 and DONALD L. J. QUICKE2 1 The Department of Organismal Biology and Anatomy, The University of Chicago, 1027 East 57th Street, Chicago, IL 60637-1508, USA ([email protected]; [email protected]) 2 Department of Biology, Imperial College at Silwood Park, Ascot, Berkshire SL57PY, UK and Department of Entomology, The Natural History Museum, Cromwell Road, London SW75BD, UK ([email protected]) (Received 29 November 2001; revised 28 August 2002; accepted 2 September 2002) ABSTRACT In an attempt to investigate differences between the most widely discussed hypotheses of early tetrapod relation- ships, we assembled a new data matrix including 90 taxa coded for 319 cranial and postcranial characters. We have incorporated, where possible, original observations of numerous taxa spread throughout the major tetrapod clades. A stem-based (total-group) definition of Tetrapoda is preferred over apomorphy- and node-based (crown-group) definitions. This definition is operational, since it is based on a formal character analysis. A PAUP* search using a recently implemented version of the parsimony ratchet method yields 64 shortest trees. Differ- ences between these trees concern: (1) the internal relationships of aı¨stopods, the three selected species of which form a trichotomy; (2) the internal relationships of embolomeres, with Archeria
    [Show full text]
  • Physical and Environmental Drivers of Paleozoic Tetrapod Dispersal Across Pangaea
    ARTICLE https://doi.org/10.1038/s41467-018-07623-x OPEN Physical and environmental drivers of Paleozoic tetrapod dispersal across Pangaea Neil Brocklehurst1,2, Emma M. Dunne3, Daniel D. Cashmore3 &Jӧrg Frӧbisch2,4 The Carboniferous and Permian were crucial intervals in the establishment of terrestrial ecosystems, which occurred alongside substantial environmental and climate changes throughout the globe, as well as the final assembly of the supercontinent of Pangaea. The fl 1234567890():,; in uence of these changes on tetrapod biogeography is highly contentious, with some authors suggesting a cosmopolitan fauna resulting from a lack of barriers, and some iden- tifying provincialism. Here we carry out a detailed historical biogeographic analysis of late Paleozoic tetrapods to study the patterns of dispersal and vicariance. A likelihood-based approach to infer ancestral areas is combined with stochastic mapping to assess rates of vicariance and dispersal. Both the late Carboniferous and the end-Guadalupian are char- acterised by a decrease in dispersal and a vicariance peak in amniotes and amphibians. The first of these shifts is attributed to orogenic activity, the second to increasing climate heterogeneity. 1 Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK. 2 Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, 10115 Berlin, Germany. 3 School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK. 4 Institut
    [Show full text]
  • Bones, Molecules, and Crown- Tetrapod Origins
    TTEC11 05/06/2003 11:47 AM Page 224 Chapter 11 Bones, molecules, and crown- tetrapod origins Marcello Ruta and Michael I. Coates ABSTRACT The timing of major events in the evolutionary history of early tetrapods is discussed in the light of a new cladistic analysis. The phylogenetic implications of this are com- pared with those of the most widely discussed, recent hypotheses of basal tetrapod interrelationships. Regardless of the sequence of cladogenetic events and positions of various Early Carboniferous taxa, these fossil-based analyses imply that the tetrapod crown-group had originated by the mid- to late Viséan. However, such estimates of the lissamphibian–amniote divergence fall short of the date implied by molecular studies. Uneven rates of molecular substitutions might be held responsible for the mismatch between molecular and morphological approaches, but the patchy quality of the fossil record also plays an important role. Morphology-based estimates of evolutionary chronology are highly sensitive to new fossil discoveries, the interpreta- tion and dating of such material, and the impact on tree topologies. Furthermore, the earliest and most primitive taxa are almost always known from very few fossil localities, with the result that these are likely to exert a disproportionate influence. Fossils and molecules should be treated as complementary approaches, rather than as conflicting and irreconcilable methods. Introduction Modern tetrapods have a long evolutionary history dating back to the Late Devonian. Their origins are rooted into a diverse, paraphyletic assemblage of lobe-finned bony fishes known as the ‘osteolepiforms’ (Cloutier and Ahlberg 1996; Janvier 1996; Ahlberg and Johanson 1998; Jeffery 2001; Johanson and Ahlberg 2001; Zhu and Schultze 2001).
    [Show full text]
  • Catalogueoftypes22brun.Pdf
    UNIVERSITY OF ILLINOIS LIBRARY AT URBANACHAMPAIGN GEOLOGY JUL 7 1995 NOTICE: Return or renew all Library Materials! The Minimum Fee for •adi Lost Book is $50.00. The person charging this material is responsible for its return to the library from which it was withdrawn on or before the Latest Date stamped below. Thett, mutilation, and underlining of books are reasons for discipli- nary action and may result in dismissal from the University. To renew call Telephone Center, 333-8400 UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN &S.19J6 L161—O-1096 'cuLUuy LIBRARY FIELDIANA Geology NEW SERIES, NO. 22 A Catalogue of Type Specimens of Fossil Vertebrates in the Field Museum of Natural History. Classes Amphibia, Reptilia, Aves, and Ichnites John Clay Bruner October 31, 1991 Publication 1430 PUBLISHED BY FIELD MUSEUM OF NATURAL HISTORY Information for Contributors to Fieldiana General: Fieldiana is primarily a journal for Field Museum staff members and research associates, althouj. manuscripts from nonaffiliated authors may be considered as space permits. The Journal carries a page charge of $65.00 per printed page or fraction thereof. Payment of at least 50% of pag< charges qualifies a paper for expedited processing, which reduces the publication time. Contributions from staff, researcl associates, and invited authors will be considered for publication regardless of ability to pay page charges, however, the ful charge is mandatory for nonaffiliated authors of unsolicited manuscripts. Three complete copies of the text (including titl< page and abstract) and of the illustrations should be submitted (one original copy plus two review copies which may b machine-copies).
    [Show full text]
  • Synoptic Taxonomy of Major Fossil Groups
    APPENDIX Synoptic Taxonomy of Major Fossil Groups Important fossil taxa are listed down to the lowest practical taxonomic level; in most cases, this will be the ordinal or subordinallevel. Abbreviated stratigraphic units in parentheses (e.g., UCamb-Ree) indicate maximum range known for the group; units followed by question marks are isolated occurrences followed generally by an interval with no known representatives. Taxa with ranges to "Ree" are extant. Data are extracted principally from Harland et al. (1967), Moore et al. (1956 et seq.), Sepkoski (1982), Romer (1966), Colbert (1980), Moy-Thomas and Miles (1971), Taylor (1981), and Brasier (1980). KINGDOM MONERA Class Ciliata (cont.) Order Spirotrichia (Tintinnida) (UOrd-Rec) DIVISION CYANOPHYTA ?Class [mertae sedis Order Chitinozoa (Proterozoic?, LOrd-UDev) Class Cyanophyceae Class Actinopoda Order Chroococcales (Archean-Rec) Subclass Radiolaria Order Nostocales (Archean-Ree) Order Polycystina Order Spongiostromales (Archean-Ree) Suborder Spumellaria (MCamb-Rec) Order Stigonematales (LDev-Rec) Suborder Nasselaria (Dev-Ree) Three minor orders KINGDOM ANIMALIA KINGDOM PROTISTA PHYLUM PORIFERA PHYLUM PROTOZOA Class Hexactinellida Order Amphidiscophora (Miss-Ree) Class Rhizopodea Order Hexactinosida (MTrias-Rec) Order Foraminiferida* Order Lyssacinosida (LCamb-Rec) Suborder Allogromiina (UCamb-Ree) Order Lychniscosida (UTrias-Rec) Suborder Textulariina (LCamb-Ree) Class Demospongia Suborder Fusulinina (Ord-Perm) Order Monaxonida (MCamb-Ree) Suborder Miliolina (Sil-Ree) Order Lithistida
    [Show full text]
  • 1 1 Appendix S1: Complete List of Characters And
    1 1 Appendix S1: Complete list of characters and modifications to the data matrix of RC07, with 2 reports of new observations of specimens. 3 The names, the abbreviations and the order of all characters and their states are 4 unchanged from RC07 unless a change is explained. We renumbered the characters we did 5 not delete from 1 to 277, so the character numbers do not match those of RC07. However, 6 merged characters retain the abbreviations of all their components: PREMAX 1-2-3 (our 7 character 1) consists of the characters PREMAX 1, PREMAX 2 and PREMAX 3 of RC07, 8 while MAX 5/PAL 5 (our ch. 22) is assembled from MAX 5 and PAL 5 of RC07. We did not 9 add any characters, except for splitting state 1 of INT FEN 1 into the new state 1 of INT FEN 10 1 (ch. 84) and states 1 and 2 of the new character MED ROS 1 (ch. 85), undoing the merger 11 of PIN FOR 1 and PIN FOR 2 (ch. 91 and 92) and splitting state 0 of TEETH 3 into the new 12 state 0 of TEETH 3 (ch. 183) and the entire new character TEETH 10 (ch. 190). A few 13 characters have additional states or are recoded in other ways. Deleted characters are retained 14 here, together with the reasons why we deleted them and the changes we made to their scores. 15 All multistate characters mention in their names whether they are ordered, unordered, 16 or treated according to a stepmatrix.
    [Show full text]
  • (Temnospondyli), and the Evolution of Modern
    THE LOWER PERMIAN DISSOROPHOID DOLESERPETON (TEMNOSPONDYLI), AND THE EVOLUTION OF MODERN AMPHIBIANS Trond Sigurdsen Department of Biology McGill University, Montreal November 2009 A thesis submitted to McGill University in partial fulfillment of the requirements of the degree of Doctor of Philosophy © Trond Sigurdsen 2009 1 ACKNOWLEDGMENTS I am deeply grateful to my supervisors Robert L. Carroll and David M. Green for their support, and for revising and correcting the drafts of the individual chapters. Without their guidance, encouragement, and enthusiasm this project would not have been possible. Hans Larsson has also provided invaluable help, comments, and suggestions. Special thanks go to John R. Bolt, who provided specimens and contributed to Chapters 1 and 3. I thank Farish Jenkins, Jason Anderson, and Eric Lombard for making additional specimens available. Robert Holmes, Jean-Claude Rage, and Zbyněk Roček have all provided helpful comments and observations. Finally, I would like to thank present and past members of the Paleolab at the Redpath Museum, Montreal, for helping out in various ways. Specifically, Thomas Alexander Dececchi, Nadia Fröbisch, Luke Harrison, Audrey Heppleston and Erin Maxwell have contributed helpful comments and technical insight. Funding was provided by NSERC, the Max Stern Recruitment Fellowship (McGill), the Delise Allison and Alma Mater student travel grants (McGill), and the Society of Vertebrate Paleontology Student Travel Grant. 2 CONTRIBUTIONS OF AUTHORS Chapters 1 and 3 were written in collaboration with Dr. John R. Bolt from the Field Museum of Chicago. The present author decided the general direction of these chapters, studied specimens, conducted the analyses, and wrote the final drafts.
    [Show full text]
  • Pennsylvanian Vertebrate Fauna
    VII PENNSYLVANIAN VERTEBRATE FAUNA By ROY LEE MOODIE THE PENNSYLVANIAN VERTEBRATE FAUNA OF KENTUCKY By ROY LEE MOODIE INTRODUCTION The vertebrates which one may expect to find in the Penn- sylvanian of Kentucky are the various types of fishes, enclosed in nodules embedded in shale, as well as in limestone and in coal; amphibians of many types, found heretofore in nodules and in cannel coal; and probably reptiles. A single incomplete skeleton found in Ohio, described below, seems to be a true reptile. Footprints and fragmentary skeletal elements found in Pennsylvania1 in Kansas2 in Oklahoma3, in Texas4 in Illinois5, and other regions, in rocks of late Pennsylvanian or early Permian age, and often spoken of as Permo- Carboniferous, indicate types of vertebrates, some of which may be reptiles. No skeletal remains or other evidences of Pennsylvanian vertebrates have so far been found in Kentucky, but there is no reason why they cannot confidently be expected to occur. A single printed reference points to such vertebrate remains6. As shown by the map, Kentucky lies immediately adjacent to regions where Pennsylvanian vertebrates have been found. That important discoveries may still be made is indicated by Carman's recent find7. Ohio where important discoveries of 1Case, E. C. Description of vertebrate fossils from the vicinity of Pittsburgh, Pa: Annals of the Carnegie Museum, IV, Nos. III-IV, pp. 234-241. pl. LIX, 1908. 2Williston, S. W. Some vertebrates from the Kansas Permian: Kansas Univ. Quart., ser. A, VI, No.1, pp. 53. fig., 1897. 3Case, E. C., On some vertebrate fossils from the Permian beds of Oklahoma.
    [Show full text]
  • Maddin Etal 2012
    The Braincase of Eocaecilia micropodia (Lissamphibia, Gymnophiona) and the Origin of Caecilians The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Maddin, Hillary Catherine, Farish A. Jenkins Jr., and Jason S. Anderson. 2012. The braincase of Eocaecilia micropodia (Lissamphibia, Gymnophiona) and the origin of caecilians. PLoS ONE 7(12): e50743. Published Version doi:10.1371/journal.pone.0050743 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:9969388 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#OAP The Braincase of Eocaecilia micropodia (Lissamphibia, Gymnophiona) and the Origin of Caecilians Hillary C. Maddin1,2*, Farish A. Jenkins, Jr.1, Jason S. Anderson2 1 Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, United States of America, 2 Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Alberta, Canada Abstract The scant fossil record of caecilians has obscured the origin and evolution of this lissamphibian group. Eocaecilia micropodia from the Lower Jurassic of North America remains the only stem-group caecilian with an almost complete skull preserved. However, this taxon has been controversial, engendering re-evaluation of traits considered to be plesiomorphic for extant caecilians. Both the validity of the placement of E. micropodia as a stem caecilian and estimates of the plesiomorphic condition of extant caecilians have been questioned.
    [Show full text]
  • Of Modern Amphibians: a Commentary
    The origin(s) of modern amphibians: a commentary. D. Marjanovic, Michel Laurin To cite this version: D. Marjanovic, Michel Laurin. The origin(s) of modern amphibians: a commentary.. Journal of Evolutionary Biology, Wiley, 2009, 36, pp.336-338. 10.1007/s11692-009-9065-8. hal-00549002 HAL Id: hal-00549002 https://hal.archives-ouvertes.fr/hal-00549002 Submitted on 7 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. The origin(s) of modern amphibians: a commentary By David Marjanović1 and Michel Laurin1* 1Address: UMR CNRS 7207 “Centre de Recherches sur la Paléobiodiversité et les Paléoenvironnements”, Muséum National d’Histoire Naturelle, Département Histoire de la Terre, Bâtiment de Géologie, case postale 48, 57 rue Cuvier, F-75231 Paris cedex 05, France *Corresponding author tel/fax. (+33 1) 44 27 36 92 E-mail: [email protected] Number of words: 1884 Number of words in text section only: 1378 2 Anderson (2008) recently reviewed the controversial topic of extant amphibian origins, on which three (groups of) hypotheses exist at the moment. Anderson favors the “polyphyly hypothesis” (PH), which considers the extant amphibians to be polyphyletic with respect to many Paleozoic limbed vertebrates and was most recently supported by the analysis of Anderson et al.
    [Show full text]