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Ontogenetic Change in the Temporal Region of the Early Permian Parareptile Delorhynchus Cifellii and the Implications for Closure of the Temporal Fenestra in Amniotes
RESEARCH ARTICLE Ontogenetic Change in the Temporal Region of the Early Permian Parareptile Delorhynchus cifellii and the Implications for Closure of the Temporal Fenestra in Amniotes Yara Haridy*, Mark J. Macdougall, Diane Scott, Robert R. Reisz Department of Biology, University of Toronto Mississauga, Mississauga, Ontario, Canada * [email protected] a11111 Abstract A juvenile specimen of Delorhynchus cifellii, collected from the Early Permian fissure-fill deposits of Richards Spur, Oklahoma, permits the first detailed study of cranial ontogeny in this parareptile. The specimen, consisting of a partially articulated skull and mandible, exhib- OPEN ACCESS its several features that identify it as juvenile. The dermal tuberosities that ornament the dor- Citation: Haridy Y, Macdougall MJ, Scott D, Reisz sal side and lateral edges of the largest skull of D. cifellii specimens, are less prominent in RR (2016) Ontogenetic Change in the Temporal the intermediate sized holotype, and are absent in the new specimen. This indicates that the Region of the Early Permian Parareptile new specimen represents an earlier ontogenetic stage than all previously described mem- Delorhynchus cifellii and the Implications for bers of this species. In addition, the incomplete interdigitation of the sutures, most notably Closure of the Temporal Fenestra in Amniotes. PLoS ONE 11(12): e0166819. doi:10.1371/journal. along the fronto-nasal contact, plus the proportionally larger sizes of the orbit and temporal pone.0166819 fenestrae further support an early ontogenetic stage for this specimen. Comparisons Editor: Thierry Smith, Royal Belgian Institute of between this juvenile and previously described specimens reveal that the size and shape of Natural Sciences, BELGIUM the temporal fenestra in Delorhynchus appear to vary through ontogeny, due to changes in Received: July 18, 2016 the shape and size of the bordering cranial elements. -
Reptile Family Tree
Reptile Family Tree - Peters 2015 Distribution of Scales, Scutes, Hair and Feathers Fish scales 100 Ichthyostega Eldeceeon 1990.7.1 Pederpes 91 Eldeceeon holotype Gephyrostegus watsoni Eryops 67 Solenodonsaurus 87 Proterogyrinus 85 100 Chroniosaurus Eoherpeton 94 72 Chroniosaurus PIN3585/124 98 Seymouria Chroniosuchus Kotlassia 58 94 Westlothiana Casineria Utegenia 84 Brouffia 95 78 Amphibamus 71 93 77 Coelostegus Cacops Paleothyris Adelospondylus 91 78 82 99 Hylonomus 100 Brachydectes Protorothyris MCZ1532 Eocaecilia 95 91 Protorothyris CM 8617 77 95 Doleserpeton 98 Gerobatrachus Protorothyris MCZ 2149 Rana 86 52 Microbrachis 92 Elliotsmithia Pantylus 93 Apsisaurus 83 92 Anthracodromeus 84 85 Aerosaurus 95 85 Utaherpeton 82 Varanodon 95 Tuditanus 91 98 61 90 Eoserpeton Varanops Diplocaulus Varanosaurus FMNH PR 1760 88 100 Sauropleura Varanosaurus BSPHM 1901 XV20 78 Ptyonius 98 89 Archaeothyris Scincosaurus 77 84 Ophiacodon 95 Micraroter 79 98 Batropetes Rhynchonkos Cutleria 59 Nikkasaurus 95 54 Biarmosuchus Silvanerpeton 72 Titanophoneus Gephyrostegeus bohemicus 96 Procynosuchus 68 100 Megazostrodon Mammal 88 Homo sapiens 100 66 Stenocybus hair 91 94 IVPP V18117 69 Galechirus 69 97 62 Suminia Niaftasuchus 65 Microurania 98 Urumqia 91 Bruktererpeton 65 IVPP V 18120 85 Venjukovia 98 100 Thuringothyris MNG 7729 Thuringothyris MNG 10183 100 Eodicynodon Dicynodon 91 Cephalerpeton 54 Reiszorhinus Haptodus 62 Concordia KUVP 8702a 95 59 Ianthasaurus 87 87 Concordia KUVP 96/95 85 Edaphosaurus Romeria primus 87 Glaucosaurus Romeria texana Secodontosaurus -
Redalyc.A New Titanosaur Sauropod from the Atacama Desert, Chile
Anais da Academia Brasileira de Ciências ISSN: 0001-3765 [email protected] Academia Brasileira de Ciências Brasil KELLNER, ALEXANDER W.A.; RUBILAR-ROGERS, DAVID; VARGAS, ALEXANDER; SUÁREZ, MARIO A new titanosaur sauropod from the Atacama Desert, Chile Anais da Academia Brasileira de Ciências, vol. 83, núm. 1, marzo, 2011, pp. 211-219 Academia Brasileira de Ciências Rio de Janeiro, Brasil Available in: http://www.redalyc.org/articulo.oa?id=32717681010 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 “main” — 2011/2/10 — 15:28 — page 211 — #1 Anais da Academia Brasileira de Ciências (2011) 83(1): 211-219 (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 www.scielo.br/aabc A new titanosaur sauropod from the Atacama Desert, Chile ALEXANDER W.A. KELLNER1, DAVID RUBILAR-ROGERS2, ALEXANDER VARGAS3 and MARIO SUÁREZ4 1Setor de Paleovertebrados, Departamento de Geologia e Paleontologia, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, São Cristóvão, 20940-040 Rio de Janeiro, RJ, Brasil 2Área Paleontología, Museo Nacional de Historia Natural, Casilla 787, Santiago, Chile 3Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Casilla 653, Santiago, Chile 4Museo Paleontológico de Caldera, Av. Wheelwrigth 001, Caldera, Chile Manuscript received on December 22, 2010; accepted for publication on January 12, 2011 ABSTRACT Partial remains of a titanosaur sauropod collected in the Tolar Formation (Upper Cretaceous) at the Atacama Desert (Antofagasta Region), northern Chile, is described, and a new species, Atacamatitan chilensis gen. -
From the Adamantina Formation, Bauru Group, Upper Cretaceous of Brazil and the Phylogenetic Relationships of Aeolosaurini
Zootaxa 3085: 1–33 (2011) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2011 · Magnolia Press ISSN 1175-5334 (online edition) A new sauropod (Macronaria, Titanosauria) from the Adamantina Formation, Bauru Group, Upper Cretaceous of Brazil and the phylogenetic relationships of Aeolosaurini RODRIGO M. SANTUCCI1 & ANTONIO C. DE ARRUDA-CAMPOS2 1Universidade de Brasília - Faculdade UnB Planaltina, Brasília-DF, 73300-000, Brazil. E-mail: [email protected] 2Museu de Paleontologia de Monte Alto, Praça do Centenário, s/n. Monte Alto-SP, 15910-000, Brazil. E-mail: [email protected] Table of contents Abstract . 1 Introduction . 2 Historical background . 2 Geological setting . 4 Systematic Palaeontology . 4 DINOSAURIA Owen, 1842 . 4 SAURISCHIA Seeley, 1887 . 4 SAUROPODA Marsh, 1878 . 4 MACRONARIA Wilson and Sereno, 1998. 4 TITANOSAURIFORMES Salgado, Coria and Calvo, 1997b. 4 TITANOSAURIA Bonaparte and Coria, 1993 . 4 AEOLOSAURINI Franco-Rosas, Salgado, Rosas and Carvalho, 2004 . 5 Aeolosaurus Powell, 1987 . 5 Aeolosaurus rionegrinus Powell, 1987 . 5 Aeolosaurus maximus sp. nov. 6 Phylogenetic analysis . 17 Comparison and discussion . 19 Conclusions . 25 Acknowledgements . 25 References . 26 APPENDIX 1. 29 APPENDIX 2. 29 Abstract Remains of a new titanosaur, Aeolosaurus maximus sp. nov., from the Adamantina Formation (Upper Cretaceous), Bauru Group, São Paulo State of Brazil are described. The new species is represented by a single partially articulated skeleton and is characterized by having a well-developed posterior protuberance below the articular area on the anterior and middle haemal arches and a lateral bulge on the distal portion of the articular process of the mid-posterior haemal arches. It shares with other Aeolosaurus species the presence of prezygapophyses curved downward on anterior caudal vertebrae and hae- mal arches with double articular facets set in a concave posterodorsal surface. -
Alpha Taxonomy of the Russian Permian Procolophonoid Reptiles
Alpha taxonomy of the Russian Permian procolophonoid reptiles LAURA K. SÄILÄ Säilä, L.K. 2009. Alpha taxonomy of the Russian Permian procolophonoid reptiles. Acta Palaeontologica Polonica 54 (4): 599–608. doi:10.4202/app.2009.0017 European Russia has been the source of many procolophonoid taxa from both the Permian and Triassic, and a Permian or− igin for the procolophonoid family Procolophonidae has been based on the Russian taxon Microphon exiguus. Recently, this taxon was reclassified as a seymouriamorph and, in its place, the taxa Nyctiphruretus, Suchonosaurus, and Kinelia from the Middle and Upper Permian of Russia were suggested as “procolophons”, using evolutionary−systematic classifi− cation methods. In recent phylogenies, however, Nyctiphruretus has been recovered as a non–procolophonoid para− reptile, whereas Kinelia and Suchonosaurus have never been included in a phylogenetic study. Re−examination indicates that Suchonosaurus is a member of the procolophonoid subfamily Procolophonidae based on the shape of the maxillary bone and the external naris, the laterally visible maxillary depression, and the number and type of maxillary teeth. Kinelia, on the other hand, is excluded from the Procolophonoidea because of its subpleurodont dental attachment and lack of any procolophonoid features. Thus, Suchonosaurus is the only confirmed Permian procolophonid from the Permian of Rus− sia. Additionally, re−examination of the holotype of Microphon exiguus confirms that it is identical to the seymouria− morph specimens recently included in the genus Microphon and that it lacks procolophonoid features. The earliest un− equivocal record of the subfamily Procolophonidae is confirmed from the Late Permian of Russia, making Russia the only region where, with certainty, both Permian and Triassic procolophonids have been discovered. -
Evidence of Advanced Sensory Perception at an Early Stage of Amniote Evolution Johannes Mu¨ Ller*, Linda A
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by PubMed Central Impedance-Matching Hearing in Paleozoic Reptiles: Evidence of Advanced Sensory Perception at an Early Stage of Amniote Evolution Johannes Mu¨ ller*, Linda A. Tsuji Humboldt-Universita¨t zu Berlin, Museum fu¨r Naturkunde, Berlin, Germany Background. Insights into the onset of evolutionary novelties are key to the understanding of amniote origins and diversification. The possession of an impedance-matching tympanic middle ear is characteristic of all terrestrial vertebrates with a sophisticated hearing sense and an adaptively important feature of many modern terrestrial vertebrates. Whereas tympanic ears seem to have evolved multiple times within tetrapods, especially among crown-group members such as frogs, mammals, squamates, turtles, crocodiles, and birds, the presence of true tympanic ears has never been recorded in a Paleozoic amniote, suggesting they evolved fairly recently in amniote history. Methodology/Principal Findings. In the present study, we performed a morphological examination and a phylogenetic analysis of poorly known parareptiles from the Middle Permian of the Mezen River Basin in Russia. We recovered a well-supported clade that is characterized by a unique cheek morphology indicative of a tympanum stretching across large parts of the temporal region to an extent not seen in other amniotes, fossil or extant, and a braincase specialized in showing modifications clearly related to an increase in auditory function, unlike the braincase of any other Paleozoic tetrapod. In addition, we estimated the ratio of the tympanum area relative to the stapedial footplate for the basalmost taxon of the clade, which, at 23:1, is in close correspondence to that of modern amniotes capable of efficient impedance-matching hearing. -