I – Introdução
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Forgotten Crocodile from the Kirtland Formation, San Juan Basin, New
posed that the narial cavities of Para- Wima1l- saurolophuswere vocal resonating chambers' Goniopholiskirtlandicus Apparently included with this material shippedto Wiman was a partial skull that lromthe Wiman describedas a new speciesof croc- forgottencrocodile odile, Goniopholis kirtlandicus. Wiman publisheda descriptionof G. kirtlandicusin Basin, 1932in the Bulletin of the GeologicalInstitute KirtlandFormation, San Juan of IJppsala. Notice of this specieshas not appearedin any Americanpublication. Klilin NewMexico (1955)presented a descriptionand illustration of the speciesin French, but essentially repeatedWiman (1932). byDonald L. Wolberg, Vertebrate Paleontologist, NewMexico Bureau of lVlinesand Mineral Resources, Socorro, NIM Localityinformation for Crocodilian bone, armor, and teeth are Goni o p holi s kir t landicus common in Late Cretaceous and Early Ter- The skeletalmaterial referred to Gonio- tiary deposits of the San Juan Basin and pholis kirtlandicus includesmost of the right elsewhere.In the Fruitland and Kirtland For- side of a skull, a squamosalfragment, and a mations of the San Juan Basin, Late Creta- portion of dorsal plate. The referral of the ceous crocodiles were important carnivores of dorsalplate probably represents an interpreta- the reconstructed stream and stream-bank tion of the proximity of the material when community (Wolberg, 1980). In the Kirtland found. Figs. I and 2, taken from Wiman Formation, a mesosuchian crocodile, Gonio- (1932),illustrate this material. pholis kirtlandicus, discovered by Charles H. Wiman(1932, p. 181)recorded the follow- Sternbergin the early 1920'sand not described ing locality data, provided by Sternberg: until 1932 by Carl Wiman, has been all but of Crocodile.Kirtland shalesa 100feet ignored since its description and referral. "Skull below the Ojo Alamo Sandstonein the blue Specimensreferred to other crocodilian genera cley. -
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. -
A Troodontid Dinosaur from the Latest Cretaceous of India
ARTICLE Received 14 Dec 2012 | Accepted 7 Mar 2013 | Published 16 Apr 2013 DOI: 10.1038/ncomms2716 A troodontid dinosaur from the latest Cretaceous of India A. Goswami1,2, G.V.R. Prasad3, O. Verma4, J.J. Flynn5 & R.B.J. Benson6 Troodontid dinosaurs share a close ancestry with birds and were distributed widely across Laurasia during the Cretaceous. Hundreds of occurrences of troodontid bones, and their highly distinctive teeth, are known from North America, Europe and Asia. Thus far, however, they remain unknown from Gondwanan landmasses. Here we report the discovery of a troodontid tooth from the uppermost Cretaceous Kallamedu Formation in the Cauvery Basin of South India. This is the first Gondwanan record for troodontids, extending their geographic range by nearly 10,000 km, and representing the first confirmed non-avian tetanuran dinosaur from the Indian subcontinent. This small-bodied maniraptoran dinosaur is an unexpected and distinctly ‘Laurasian’ component of an otherwise typical ‘Gondwanan’ tetrapod assemblage, including notosuchian crocodiles, abelisauroid dinosaurs and gondwanathere mammals. This discovery raises the question of whether troodontids dispersed to India from Laurasia in the Late Cretaceous, or whether a broader Gondwanan distribution of troodontids remains to be discovered. 1 Department of Genetics, Evolution, and Environment, University College London, London WC1E 6BT, UK. 2 Department of Earth Sciences, University College London, London WC1E 6BT, UK. 3 Department of Geology, Centre for Advanced Studies, University of Delhi, New Delhi 110 007, India. 4 Geology Discipline Group, School of Sciences, Indira Gandhi National Open University, New Delhi 110 068, India. 5 Division of Paleontology and Richard Gilder Graduate School, American Museum of Natural History, New York, New York 10024, USA. -
Craniofacial Morphology of Simosuchus Clarki (Crocodyliformes: Notosuchia) from the Late Cretaceous of Madagascar
Society of Vertebrate Paleontology Memoir 10 Journal of Vertebrate Paleontology Volume 30, Supplement to Number 6: 13–98, November 2010 © 2010 by the Society of Vertebrate Paleontology CRANIOFACIAL MORPHOLOGY OF SIMOSUCHUS CLARKI (CROCODYLIFORMES: NOTOSUCHIA) FROM THE LATE CRETACEOUS OF MADAGASCAR NATHAN J. KLEY,*,1 JOSEPH J. W. SERTICH,1 ALAN H. TURNER,1 DAVID W. KRAUSE,1 PATRICK M. O’CONNOR,2 and JUSTIN A. GEORGI3 1Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York, 11794-8081, U.S.A., [email protected]; [email protected]; [email protected]; [email protected]; 2Department of Biomedical Sciences, Ohio University College of Osteopathic Medicine, Athens, Ohio 45701, U.S.A., [email protected]; 3Department of Anatomy, Arizona College of Osteopathic Medicine, Midwestern University, Glendale, Arizona 85308, U.S.A., [email protected] ABSTRACT—Simosuchus clarki is a small, pug-nosed notosuchian crocodyliform from the Late Cretaceous of Madagascar. Originally described on the basis of a single specimen including a remarkably complete and well-preserved skull and lower jaw, S. clarki is now known from five additional specimens that preserve portions of the craniofacial skeleton. Collectively, these six specimens represent all elements of the head skeleton except the stapedes, thus making the craniofacial skeleton of S. clarki one of the best and most completely preserved among all known basal mesoeucrocodylians. In this report, we provide a detailed description of the entire head skeleton of S. clarki, including a portion of the hyobranchial apparatus. The two most complete and well-preserved specimens differ substantially in several size and shape variables (e.g., projections, angulations, and areas of ornamentation), suggestive of sexual dimorphism. -
The Baurusuchidae Vs Theropoda Record in the Bauru Group (Upper Cretaceous, Brazil): a Taphonomic Perspective
Journal of Iberian Geology https://doi.org/10.1007/s41513-018-0048-4 RESEARCH PAPER The Baurusuchidae vs Theropoda record in the Bauru Group (Upper Cretaceous, Brazil): a taphonomic perspective Kamila L. N. Bandeira1 · Arthur S. Brum1 · Rodrigo V. Pêgas1 · Giovanne M. Cidade2 · Borja Holgado1 · André Cidade1 · Rafael Gomes de Souza1 Received: 31 July 2017 / Accepted: 23 January 2018 © Springer International Publishing AG, part of Springer Nature 2018 Abstract Purpose The Bauru Group is worldwide known due to its high diversity of archosaurs, especially that of Crocodyliformes. Recently, it has been suggested that the Crocodyliformes, especially the Baurusuchidae, were the top predators of the Bauru Group, based on their anatomical convergence with theropods and the dearth of those last ones in the fossil record of this geological group. Methods Here, we erect the hypothesis that assumption is taphonomically biased. For this purpose, we made a literature survey on all the published specimens of Theropoda, Baurusuchidae and Titanosauria from all geological units from the Bauru Group. Also, we gathered data from the available literature, and we classifed each fossil fnd under a taphonomic class proposed on this work. Results We show that those groups have diferent degrees of bone representativeness and diferent qualities of preservation pattern. Also, we suggest that baurusuchids lived close to or in the abundant food plains, which explains the good preserva- tion of their remains. Theropods and titanosaurs did not live in association with such environments and the quality of their preservation has thus been negatively afected. Conclusions We support the idea that the Baurusuchidae played an important role in the food chain of the ecological niches of the Late Cretaceous Bauru Group, but the possible biases in their fossil record relative to Theropoda do not support the conclusion that baurusuchids outcompeted theropods. -
Novos Sítios Fossilíferos Da Formação Romualdo
Anuário do Instituto de Geociências - UFRJ www.anuario.igeo.ufrj.br Novos Sítios Fossilíferos da Formação Romualdo, Cretáceo Inferior, Bacia do Araripe, Exu, Pernambuco, Nordeste do Brasil New Fossiliferous Sites of the Romualdo Formation, Lower Cretaceous, Araripe Basin, Exu, Pernambuco, Northeast of Brazil Rudah Ruano Cavalcanti Duque & Alcina Magnólia Franca Barreto Universidade Federal de Pernambuco, Centro de Tecnologia e Geociências, Departamento de Geologia, Av. Acadêmico Hélio Ramos, s/n, 50740-530, Cidade Universitária, Recife, PE, Brasil. E-mails: [email protected]; [email protected] Recebido em: 10/01/2018 Aprovado em:01/03/2018 DOI: http://dx.doi.org/10.11137/2018_1_05_14 Resumo Aqui são apresentados antigos e novos sítios fossilíferos da Formação Romualdo, Albiano da Bacia do Araripe, no município de Exu, Pernambuco, Nordeste do Brasil, com o levantamento da sua diversidade fossilífera, com ênfase em paleovertebrados. Foram estudadas sete localidades da porção sudoeste da Bacia Sedimentar do Araripe, sendo identificados 16 táxons de paleovertebrados, incluindo peixes: Vinctifer comptoni, Rhacolepis buccalis, Calamopleurus cylindricus, Cladocyclus gardneri, Neoproscinetes penalvai, Paraelops cearenses, Tharrhias araripis, Notelops brama, Araripelepdotes temnurus, Brannerion sp. e Beurlenichthys ouricuriensis; pterossauros Anhangueridae e quelônios (Araripemys barretoi). A Paleofauna de vertebrados da Formação Romualdo vem sendo estudada desde 1800, é reconhecida internacionalmente como Fossillagerstätte. Porém, a -
A New Sebecid Mesoeucrocodylian from the Rio Loro Formation (Palaeocene) of North-Western Argentina
Zoological Journal of the Linnean Society, 2011, 163, S7–S36. With 17 figures A new sebecid mesoeucrocodylian from the Rio Loro Formation (Palaeocene) of north-western Argentina DIEGO POL1* and JAIME E. POWELL2 1CONICET, Museo Paleontológico Egidio Feruglio, Ave. Fontana 140, Trelew CP 9100, Chubut, Argentina 2CONICET, Instituto Miguel Lillo, Miguel Lillio 205, San Miguel de Tucumán CP 4000, Tucumán, Argentina Received 2 March 2010; revised 10 October 2010; accepted for publication 19 October 2010 A new basal mesoeucrocodylian, Lorosuchus nodosus gen. et sp. nov., from the Palaeocene of north-western Argentina is presented here. The new taxon is diagnosed by the presence of external nares facing dorsally, completely septated, and retracted posteriorly, elevated narial rim, sagittal crest on the anteromedial margins of both premaxillae, dorsal crests and protuberances on the anterior half of the rostrum, and anterior-most three maxillary teeth with emarginated alveolar margins. This taxon is most parsimoniously interpreted as a bizarre and highly autapomorphic basal member of Sebecidae, a position supported (amongst other characters) by the elongated bar-like pterygoid flanges, a laterally opened notch and fossa in the pterygoids located posterolaterally to the choanal opening (parachoanal fossa), base of postorbital process of jugal directed dorsally, and palatal parts of the premaxillae meeting posteriorly to the incisive foramen. Lorosuchus nodosus also shares with basal neosuchians a suite of derived characters that are interpreted as convergently acquired and possibly related to their semiaquatic lifestyle. The phylogenetic analysis used for testing the phylogenetic affinities of L. nodosus depicts Sebecidae as the sister group of Baurusuchidae, forming a monophyletic Sebecosuchia that is deeply nested within Notosuchia. -
Postcranial Anatomy of Sebecus Icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia Diego Pol a , Juan M
This article was downloaded by: [Diego Pol] On: 05 March 2012, At: 07:36 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 Vertebrate Paleontology Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/ujvp20 Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia Diego Pol a , Juan M. Leardi b , Agustina Lecuona a & Marcelo Krause a a CONICET, Museo Paleontológico Egidio Feruglio, Avenida Fontana 140, Trelew, 9100, Chubut, Argentina b CONICET, IDEAN, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, Buenos Aires, 1428, Argentina Available online: 28 Feb 2012 To cite this article: Diego Pol, Juan M. Leardi, Agustina Lecuona & Marcelo Krause (2012): Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia, Journal of Vertebrate Paleontology, 32:2, 328-354 To link to this article: http://dx.doi.org/10.1080/02724634.2012.646833 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.tandfonline.com/page/terms-and-conditions This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. -
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From the Late Cretaceous of Brazil and the Phylogeny of Baurusuchidae
A New Baurusuchid (Crocodyliformes, Mesoeucrocodylia) from the Late Cretaceous of Brazil and the Phylogeny of Baurusuchidae Felipe C. Montefeltro1*, Hans C. E. Larsson2, Max C. Langer1 1 Departamento de Biologia, Faculdade de Filosofia, Cieˆncias e Letras de Ribeira˜o Preto – Universidade de Sa˜o Paulo, Ribeira˜o Preto, Brazil, 2 Redpath Museum, McGill University, Montre´al, Canada Abstract Background: Baurusuchidae is a group of extinct Crocodyliformes with peculiar, dog-faced skulls, hypertrophied canines, and terrestrial, cursorial limb morphologies. Their importance for crocodyliform evolution and biogeography is widely recognized, and many new taxa have been recently described. In most phylogenetic analyses of Mesoeucrocodylia, the entire clade is represented only by Baurusuchus pachecoi, and no work has attempted to study the internal relationships of the group or diagnose the clade and its members. Methodology/Principal Findings: Based on a nearly complete skull and a referred partial skull and lower jaw, we describe a new baurusuchid from the Vale do Rio do Peixe Formation (Bauru Group), Late Cretaceous of Brazil. The taxon is diagnosed by a suite of characters that include: four maxillary teeth, supratemporal fenestra with equally developed medial and anterior rims, four laterally visible quadrate fenestrae, lateral Eustachian foramina larger than medial Eustachian foramen, deep depression on the dorsal surface of pterygoid wing. The new taxon was compared to all other baurusuchids and their internal relationships were examined based on the maximum parsimony analysis of a discrete morphological data matrix. Conclusion: The monophyly of Baurusuchidae is supported by a large number of unique characters implying an equally large morphological gap between the clade and its immediate outgroups. -
The Serrated Teeth Ofsebecus and the Iberoccitanian Crocodile. A
STVDIA GEOLÓGICA SALMANTICENSIA, XXIX, 127-144 (1994) THE SERRATED TEETH OF SEBECUS AND THE IBEROCCITANIAN CROCODILE, A MORPHOLOGICAL AND ULTRASTRUCTURAL COMPARISON O. LEGASA (*) A. D. BUSCALIONI (*) Z. GASPARINI (**) RESUMEN:- Se compara la morfología y ultraestructura del esmalte de dientes aserrados de cocodrilos. La muestra está compuesta por coronas aisladas atribuidas a la forma iberoccitana (Eoceno de la cuenca del Duero) y Sebecus (S. ?huilensis y S. icaeorhinus del Mioceno medio de Colombia y Eoceno inferior de Argentina). Se examinaron caracteres cuantitativos y cualitativos de la corona y sus márgenes aserrados. En este sentido, se han explorado todas las variables que caracterizan la simetría de la corona dentaria, diferenciando los dientes más grandes de Sebecus ?huilensis de los de la forma iberoccitana. El análisis de la ultraestructura evidencia una organización pseudoprismática del esmalte de Sebecus ?huilensis, contrastando con el modelo aprismático del cocodrilo iberoccitano. En este artículo se definen los dientes aserrados como aquellos que poseen carenas con dentículos aislados. Un dentículo aislado es una unidad morfológica discreta. Esta definición excluye los dientes con carenas crenulados formadas por crestas anastomosadas convergentes, que proceden de la ornamentación del esmalte. También, se evalúan aspectos funcionales de los dientes considerando los microdesgastes observados en los dentículos aislados. ABSTRACT:- The morphology and enamel ultrastructure of serrated teeth of crocodiles is compared. The sample is composed by isolated teeth attributed to the iberoccitanian form (Eocene of the Duero basin, Spain) and Sebecus (S. ?huilensis and (*): Unidad de Paleontología. Dpto. Biología. Universidad Autónoma, Cantoblanco 28049 Madrid, Spain. (**): Museo de La Plata, Paseo del Bosque s/n. 1900 La Plata. -
Pleistocene Ziphodont Crocodilians of Queensland
AUSTRALIAN MUSEUM SCIENTIFIC PUBLICATIONS Molnar, R. E. 1982. Pleistocene ziphodont crocodilians of Queensland. Records of the Australian Museum 33(19): 803–834, October 1981. [Published January 1982]. http://dx.doi.org/10.3853/j.0067-1975.33.1981.198 ISSN 0067-1975 Published by the Australian Museum, Sydney. nature culture discover Australian Museum science is freely accessible online at www.australianmuseum.net.au/Scientific-Publications 6 College Street, Sydney NSW 2010, Australia PLEISTOCENE ZIPHODONT CROCODllIANS OF QUEENSLAND R. E. MOLNAR Queensland Museum Fortitude Valley, Qld. 4006 SUMMARY The rostral portion of a crocodilian skull, from the Pleistocene cave deposits of Tea Tree Cave, near Chillagoe, north Queensland, is described as the type of the new genus and species, Quinkana fortirostrum. The form of the alveoli suggests that a ziphodont dentition was present. A second specimen, referred to Quinkana sp. from the Pleistocene cave deposits of Texas Caves, south Queensland, confirms the presence of ziphodont teeth. Isolated ziphodont teeth have also been found in eastern Queensland from central Cape York Peninsula in the north to Toowoomba in the south. Quinkana fortirostrum is a eusuchian, probably related to Pristichampsus. The environments of deposition of the beds yielding ziphodont crocodilians do not provide any evidence for (or against) a fully terrestrial habitat for these creatures. The somewhat problematic Chinese Hsisosuchus chungkingensis shows three apomorphic sebe.cosuchian character states, and is thus considered a sebecosuchian. INTRODUCTION The term ziphodont crocodilian refers to those crocodilians possessing a particular adaptation in which a relatively deep, steep sided snout is combined with laterally flattened, serrate teeth (Langston, 1975).