A New Candidate for Leviathan?
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Biological Journal of the Linnean Society Marine tethysuchian c rocodyliform from the ?Aptian -Albian (Early Cretaceous) of the Isle of Wight, England Journal:For Biological Peer Journal of theReview Linnean Society Manuscript ID: BJLS-3227.R1 Manuscript Type: Research Article Date Submitted by the Author: 05-May-2014 Complete List of Authors: Young, Mark; University of Edinburgh, Biological Sciences; University of Southampton, School of Ocean and Earth Science Steel, Lorna; Natural History Museum, Earth Sciences Foffa, Davide; University of Bristol, Department of Earth Sciences Price, Trevor; Dinosaur Isle Museum, Naish, Darren; University of Southampton, School of Ocean and Earth Science Tennant, Jon; Imperial College London, Department of Earth Science and Engineering Albian, Aptian, Cretaceous, Dyrosauridae, England, Ferruginous Sands Keywords: Formation, Isle of Wight, Pholidosauridae, Tethysuchia, Upper Greensand Formation Biological Journal of the Linnean Society Page 1 of 50 Biological Journal of the Linnean Society 1 2 3 Marine tethysuchian crocodyliform from the ?Aptian-Albian (Early Cretaceous) 4 5 6 of the Isle of Wight, England 7 8 9 10 by MARK T. YOUNG 1,2 *, LORNA STEEL 3, DAVIDE FOFFA 4, TREVOR PRICE 5 11 12 2 6 13 DARREN NAISH and JONATHAN P. TENNANT 14 15 16 1 17 Institute of Evolutionary Biology, School of Biological Sciences, The King’s Buildings, University 18 For Peer Review 19 of Edinburgh, Edinburgh, EH9 3JW, United Kingdom 20 21 2 School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, -
Goniopholididae) from the Albian of Andorra (Teruel, Spain): Phylogenetic Implications
Journal of Iberian Geology 41 (1) 2015: 41-56 http://dx.doi.org/10.5209/rev_JIGE.2015.v41.n1.48654 www.ucm.es /info/estratig/journal.htm ISSN (print): 1698-6180. ISSN (online): 1886-7995 New material from a huge specimen of Anteophthalmosuchus cf. escuchae (Goniopholididae) from the Albian of Andorra (Teruel, Spain): Phylogenetic implications E. Puértolas-Pascual1,2*, J.I. Canudo1,2, L.M. Sender2 1Grupo Aragosaurus-IUCA, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009 Zaragoza, Spain. 2Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza, c/Pedro Cerbuna No. 12, 50009 Zaragoza, Spain. e-mail addresses: [email protected] (E.P.P, *corresponding author); [email protected] (J.I.C.); [email protected] (L.M.S.) Received: 15 December 2013 / Accepted: 18 December 2014 / Available online: 25 March 2015 Abstract In 2011 the partial skeleton of a goniopholidid crocodylomorph was recovered in the ENDESA coal mine Mina Corta Barrabasa (Escu- cha Formation, lower Albian), located in the municipality of Andorra (Teruel, Spain). This new goniopholidid material is represented by abundant postcranial and fragmentary cranial bones. The study of these remains coincides with a recent description in 2013 of at least two new species of goniopholidids in the palaeontological site of Mina Santa María in Ariño (Teruel), also in the Escucha Formation. These species are Anteophthalmosuchus escuchae, Hulkepholis plotos and an undetermined goniopholidid, AR-1-3422. In the present paper, we describe the postcranial and cranial bones of the goniopholidid from Mina Corta Barrabasa and compare it with the species from Mina Santa María. -
CROCODYLIFORMES, MESOEUCROCODYLIA) from the EARLY CRETACEOUS of NORTH-EAST BRAZIL by DANIEL C
[Palaeontology, Vol. 52, Part 5, 2009, pp. 991–1007] A NEW NEOSUCHIAN CROCODYLOMORPH (CROCODYLIFORMES, MESOEUCROCODYLIA) FROM THE EARLY CRETACEOUS OF NORTH-EAST BRAZIL by DANIEL C. FORTIER and CESAR L. SCHULTZ Departamento de Paleontologia e Estratigrafia, UFRGS, Avenida Bento Gonc¸alves 9500, 91501-970 Porto Alegre, C.P. 15001 RS, Brazil; e-mails: [email protected]; [email protected] Typescript received 27 March 2008; accepted in revised form 3 November 2008 Abstract: A new neosuchian crocodylomorph, Susisuchus we recovered the family name Susisuchidae, but with a new jaguaribensis sp. nov., is described based on fragmentary but definition, being node-based group including the last com- diagnostic material. It was found in fluvial-braided sedi- mon ancestor of Susisuchus anatoceps and Susisuchus jagua- ments of the Lima Campos Basin, north-eastern Brazil, ribensis and all of its descendents. This new species 115 km from where Susisuchus anatoceps was found, in corroborates the idea that the origin of eusuchians was a rocks of the Crato Formation, Araripe Basin. S. jaguaribensis complex evolutionary event and that the fossil record is still and S. anatoceps share a squamosal–parietal contact in the very incomplete. posterior wall of the supratemporal fenestra. A phylogenetic analysis places the genus Susisuchus as the sister group to Key words: Crocodyliformes, Mesoeucrocodylia, Neosuchia, Eusuchia, confirming earlier studies. Because of its position, Susisuchus, new species, Early Cretaceous, north-east Brazil. B razilian crocodylomorphs form a very expressive Turonian–Maastrichtian of Bauru basin: Adamantinasu- record of Mesozoic vertebrates, with more than twenty chus navae (Nobre and Carvalho, 2006), Baurusuchus species described up to now. -
Big-Headed Marine Crocodyliforms and Why We Must Be Cautious When Using Extant Species As Body Length Proxies for Long-Extinct Relatives
Palaeontologia Electronica palaeo-electronica.org Big-headed marine crocodyliforms and why we must be cautious when using extant species as body length proxies for long-extinct relatives Mark T. Young, Márton Rabi, Mark A. Bell, Davide Foffa, Lorna Steel, Sven Sachs, and Karin Peyer ABSTRACT Body size is commonly used as a key variable for estimating ecomorphological trends at a macroevolutionary scale, making reliable body length estimates of fossil taxa critically important. Crocodylomorphs (extant crocodylians and their extinct rela- tives) evolved numerous 'aberrant' body-plans during their ~230 million-year history, ranging from ‘hooved’ terrestrial species to dolphin-like pelagic species. Such clades evolved distinct cranial and femoral scaling ratios (compared to total body length), thereby making extant taxa unsuitable proxies for estimating their body lengths. Here we illustrate that the fossil clade Teleosauridae also fits into this category. Teleosaurids were a predominately shallow marine clade that had a global distribution during the Jurassic. Known to have evolved a wide range of body lengths (2–5 m based on com- plete skeletons), there is currently no way of reliably estimating the size of incomplete specimens. This is surprising, as some teleosaurids have been considered very large (9–10 m in total length), thus making Teleosauridae the largest bodied clade during the first 100 million years of crocodylomorph evolution. Our examination and regression analyses of the best preserved teleosaurid skeletons demonstrates that: they were smaller than previously thought, with no known specimen exceeding 7.2 m in length; and that they had proportionally large skulls, and proportionally short femora, when compared to body length. -
Who's Got the Biggest?
WHO’S GOT THE BIGGEST? Rom Whitaker and Nik Whitaker [Adapted by inclusion of additional images from article in Crocodile Specialist Group Newsletter 27(4): 26-30] The fascination for ‘fi nding the biggest’ is deeply engrained, and when fi lm producer Harry Marshall at Icon Films (UK) offered a chance to search for the world’s largest crocodilian - who could refuse? Claims of giant crocodiles are as wild as those for outsize fi sh and snakes. “It was longer than the boat”, has been earnestly related in a dozen languages, from the Rift Valley lakes of Figure 2. Alistair Graham with skull of 6.2 m (20’) long C. Ethiopia to the mighty Fly River in Papua New Guinea. And porosus from the Fly River, Papua New Guinea (see Fig. the Fly River is where this ‘skull quest’ (for that’s what it’s 1). Photograph: Rom Whitaker. become) began. Largest Crocodile with Photographic Documentation The note that Jerome published on this fi nd (Montague 1983) didn’t exactly shake the world. People were (and still are) quite In 1980 I (RW) was working for the United Nations crocodile convinced that C. porosus well over 20’ long are on record. program in Papua New Guinea as ‘Production Manager’; the But when the quest for the biggest started to get serious, it second author (NW) was also there, see illustration. Along was soon obvious that these ‘records’ are mostly anecdotes with UN volunteer Jerome Montague, also a biologist, we with no solid evidence. Some colleagues are ready to accept went off on patrol down the Fly River, checking on the anecdotal total lengths - we are much more skeptical. -
River Dragons: Nile Crocodiles
RIVER DRAGONS: NILE CROCODILES MIDDLE SCHOOL By MIKE HEITHAUS Ph.D KEY WORDS BALANCED FORCE BODY SYSTEM L CIRCULATORY SYSTEM COURTSHIP DELTA DIGESTIVE SYSTEM DOMINANCE ECTOTHERM ENERGY EVAPORATION EXCRETORY SYSTEM IMMUNE SYSTEM KINETIC ENERGY MOLECULE MUSCULAR SYSTEM NERVOUS SYSTEM ORGAN POTENTIAL ENERGY RESPIRATORY SYSTEM SKELETAL SYSTEM TISSUE TRANSPIRATION UNBALANCED FORCE TABLE OF CONTENTS Masters of Freshwater 2 L Croc, Gator, Caiman, or Gharial 3 More Than Freshwater 6 Built for Success 10 Dinner Time! 16 Crocodile Social Lives 18 Croc Trouble 20 Nile Crocodile! 22 Okavango! 26 Crocs in Human Country 29 Engineering Animal Solutions 31 Energy and Force 32 Studying Crocodiles 33 Glossary 35 1 MASTERS OF FRESHWATER Crocodiles and their extinct relatives have been at the top of the food chain in tropical lakes, rivers, and wetlands for millions of years. Today, crocodiles, along with alligators, 2 caimans, and gharials – members of a group called the “crocodilians”– are the undisputed masters of the freshwater 3 habitats where they are found. 6 With some species, like the Nile crocodile (Crocodylus niloticus), growing to enormous size, being equipped with incredible 10 strength and speed, and having the most powerful jaws on the planet, even big animals have to be careful coming to the 16 water for a drink! Crocodilians seem like they are river dragons! 18 Because crocodilians can be dangerous and people have used them for food and other products, populations of many species 20 have been hunted to near extinction. But people have helped most crocodilians begin to recover and take back their place in 22 ecosystems. People need to nd ways to protect the growing populations of these incredible animals as well as their pets, 26 livestock, and themselves. -
A New Blunt-Snouted Dyrosaurid, Anthracosuchus Balrogus Gen. Et Sp
Historical Biology, 2014 http://dx.doi.org/10.1080/08912963.2014.918968 A new blunt-snouted dyrosaurid, Anthracosuchus balrogus gen. et sp. nov. (Crocodylomorpha, Mesoeucrocodylia), from the Palaeocene of Colombia Alexander K. Hastingsa,b*, Jonathan I. Blocha and Carlos A. Jaramilloc aFlorida Museum of Natural History, University of Florida, Gainesville, FL, USA; bGeiseltalmuseum, Zentralmagazin Naturwissenschaftlicher Sammlungen, Martin Luther Universita¨t Halle-Wittenberg, Halle (Saale), Germany; cSmithsonian Tropical Research Institute, Balboa-Ancon, Panama (Received 23 March 2014; accepted 24 April 2014) A new exceptionally brevirostrine dyrosaurid is described from the middle Palaeocene (58–60 million years ago) Cerrejo´n Formation, northeastern Colombia, based on four partial skulls and associated postcrania. This taxon is unique among dyrosaurids not only in skull shape, but also in having orbital tuberosities, and osteoderms that are dorsoventrally thick and unpitted, a trait otherwise unknown in Crocodylomorpha. Results from a cladistic analysis of Dyrosauridae suggest that the new taxon, together with Cretaceous–Palaeocene Chenanisuchus lateroculi from Africa and Cerrejonisuchus improcerus also from the Cerrejo´n Formation, are the most basal members of the family. Results from a biogeographic analysis indicate at least three independent dispersals of dyrosaurids from Africa to the New World occurred in the Late Cretaceous or early Palaeocene. Widely set orbits in the new taxon indicate a deviation from surface-based predation, -
New Crocodyliform Specimens from Recôncavo-Tucano Basin (Early Cretaceous) of Bahia, Brazil
Anais da Academia Brasileira de Ciências (2019) 91(Suppl. 2): e20170382 (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 http://dx.doi.org/10.1590/0001-3765201720170382 www.scielo.br/aabc | www.fb.com/aabcjournal New Crocodyliform specimens from Recôncavo-Tucano Basin (Early Cretaceous) of Bahia, Brazil RAFAEL G. DE SOUZA1 and DIOGENES A. CAMPOS2 1Laboratório de Sistemática e Tafonomia de Vertebrados Fósseis, Setor 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, Brazil ²Museu de Ciências da Terra - CPRM, Av. Pasteur, 404, 22290-255 Rio de Janeiro, RJ, Brazil Manuscript received on May 19, 2017; accepted for publication on October 23, 2017 How to cite: SOUZA RG AND CAMPOS DA. 2019. New Crocodyliform specimens from Recôncavo-Tucano Basin (Early Cretaceous) of Bahia, Brazil. An Acad Bras Cienc 91: e20170382. DOI 10.1590/0001-3765201720170382. Abstract: In 1940, L.I. Price and A. Oliveira recovered four crocodyliform specimens from the Early Cretaceous Bahia Supergroup (Recôncavo-Tucano Basin). In the present work, we describe four different fossil specimens: an osteoderm, a fibula, a tibia, and some autopodial bones. No further identification besides Mesoeucrocodylia was made due to their fragmentary nature and the reduced number of recognized synapomorphies for more inclusive clades. With exception of the fibula, all other specimens have at least one particular feature, which with new specimens could represent new species. The new specimens described here increase the known diversity of Early Cretaceous crocodyliforms from Brazil. -
Outline 17: Reptiles and Dinosaurs
Outline 17: Reptiles and Dinosaurs Evolution of Reptiles • The first reptiles appeared in the Mississippian. • They evolved from amphibians, which first appeared in the Devonian. • The evolutionary jump was the invention of the amniote egg. The Amniote Egg • Requires internal fertilization, unlike amphibians. • Has a hard, but porous shell. • Can be laid on dry land. Skips the tadpole stage of amphibians. • Has a complex series of membranes and a very large yolk. Amphibian Egg: No Shell Frog eggs in a Morgantown pond Typical amniote egg with an embryonic reptile. Crocodiles hatching from their amniote eggs Making Lizard Eggs This is X-rated Making Dinosaur Eggs Fossilized embryos still in the shells Closeup of developing embryo Searching for sauropod dinosaur eggs in Patagonia A single egg laying on an outcrop Dinosaur developing in the egg Researcher working on a nest of sauropod dinosaur eggs Mother and hatchlings in Patagonia sometime in the Cretaceous The fate of many hatchlings Dinosaur parent died while sitting on nest with eggs Recovering the fossil seen in last slide Dinosaur eggs and reconstructed embryo Major Reptile Groups • Anapsids - the stem reptiles, turtles are the only living group. • Synapsids - the mammal-like reptiles. Mammals evolved from synapsids. • Diapsids - all modern reptiles except for turtles. Dinosaurs evolved from diapsids. Pennsylvanian anapsid or stem reptile Living anapsid reptile: snapping turtle Living diapsid reptile: iguana Living diapsid reptile: crocodile Permian synapsid reptiles: Dimetrodon Triassic synapsid reptiles: Therapsids or mammal-like reptiles The Mesozoic: The Age of Reptiles A Nile crocodile. Notice the unspecialized reptilian teeth. Fossil Crocodile from the Jurassic Marine crocodiles of the Mesozoic 28 ft. -
The Jurassic/Cretaceous Boundary: a Hidden Mass Extinction in Tetrapods?
The Jurassic/Cretaceous boundary: a hidden mass extinction in tetrapods? Jonathan P. Tennant CID: 00661116 Imperial College London Department of Earth Science and Engineering Thesis submitted to fulfil the requirements for the degree of Doctor of Philosophy and Diploma of Imperial College Image credit: Robert Nicholls (CC BY 4.0). Depicts Sarcosuchus imperator, a giant predatory crocodyliform from the Cretaceous of North Africa. 1 Declaration of originality I declare that the works presented within this thesis are my own, and that all other work is appropriately acknowledged and referenced within. Copyright declaration The copyright of this thesis rests with the author, and it is made available under a Creative Commons Attribution (CC BY 4.0) license. Researchers are free to copy, distribute and transmit this thesis on the condition that it is appropriately attributed. Jonathan Peter Tennant Supervisors: Dr. Philip Mannion (Imperial College London); Prof. Paul Upchurch (University College London); Dr. Mark Sutton (Imperial College London). 2 Acknowledgements First and definitely foremost, I want to extend my greatest thanks to Phil Mannion. As his first PhD student, I am sure he regretted his decision after day one, but stuck with it until the end, and has been a stoic mentor throughout. This project would have been a shadow of what it came to be without his guidance. I am still yet to get him on Twitter though. I am also hugely grateful to Paul Upchurch and Mark Sutton for their input and experience throughout this project. I also could not have completed this project without the encouragement and support from my girlfriend, friends, and family, and am hugely grateful to them. -
(Crocodylomorpha: Neosuchia): Implications for the Rise of Eusuchia
Zoological Journal of the Linnean Society, 2016, 177, 854–936. With 11 figures Evolutionary relationships and systematics of Atoposauridae (Crocodylomorpha: Neosuchia): implications for the rise of Eusuchia JONATHAN P. TENNANT1*, PHILIP D. MANNION1 and PAUL UPCHURCH2 1Department of Earth Science and Engineering, Imperial College London, South Kensington, London SW7 2AZ, UK 2Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK Received 18 August 2015; revised 5 January 2016; accepted for publication 19 January 2016 Atoposaurids are a group of small-bodied, extinct crocodyliforms, regarded as an important component of Jurassic and Cretaceous Laurasian semi-aquatic ecosystems. Despite the group being known for over 150 years, the taxonomic composition of Atoposauridae and its position within Crocodyliformes are unresolved. Uncertainty revolves around their placement within Neosuchia, in which they have been found to occupy a range of positions from the most basal neosuchian clade to more crownward eusuchians. This problem stems from a lack of adequate taxonomic treatment of specimens assigned to Atoposauridae, and key taxa such as Theriosuchus have become taxonomic ‘waste baskets’. Here, we incorporate all putative atoposaurid species into a new phylogenetic data matrix comprising 24 taxa scored for 329 characters. Many of our characters are heavily revised or novel to this study, and several ingroup taxa have never previously been included in a phylogenetic analysis. Parsimony and Bayesian approaches both recover Atoposauridae as a basal clade within Neosuchia, more stemward than coelognathosuchians, bernissartiids, and paralligatorids. Atoposauridae is a much more exclusive clade than previously recognized, comprising just three genera (Alligatorellus, Alligatorium, and Atoposaurus) that were restricted to the Late Jurassic of western Europe, and went extinct at the Jurassic/Cretaceous boundary. -
Cover for ICB Chosen AKT11799.Indd
Downloaded from https://academic.oup.com/iob/article-abstract/1/1/obz006/5418825 by U. of Florida Health Science Center Library user on 05 May 2020 ISSN 1540-7063 (PRINT) ISSN 1557-7023 (ONLINE) Integrative OrganismalA Journal of the Society Biology for Integrative and Comparative Biology academic.oup.com/icb Integrative Organismal Biology Integrative Organismal Biology,pp.1±–15 doi:10.1093/iob/obz006 A Journal of the Society for Integrative and Comparative Biology RESEARCH ARTICLE Downloaded from https://academic.oup.com/iob/article-abstract/1/1/obz006/5418825 by U. of Florida Health Science Center Library user on 05 May 2020 Crocodylian Head Width Allometry and Phylogenetic Prediction of Body Size in Extinct Crocodyliforms Haley D. O’Brien,1,* Leigha M. Lynch,† Kent A. Vliet,‡ John Brueggen,§ Gregory M. Erickson¶ and Paul M. Gignac2,* *Oklahoma State University Center for Health Sciences, 1111 West 17th Street, Tulsa, OK 74107, USA; †Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA; ‡Department of Biology, University of Florida, Gainesville, FL 32611, USA; §St. Augustine Alligator Farm Zoological Park, 999 Anastasia Blvd, St. Augustine, FL 32080, USA; ¶Department of Biological Sciences, Florida State University, 600 West College Avenue, Tallahassee, FL 32306, USA 1E-mail: [email protected] 2E-mail: [email protected] Synopsis Body size and body-size shifts broadly impact Synopsis Alometria de Largura da Cabec¸a de life-history parameters of all animals, which has made ac- Crocodilianos e Previsa˜o Filogene´tica de Tamanho curate body-size estimates for extinct taxa an important Corporal em Crocodilianos Extintos (Crocodylian Head component of understanding their paleobiology.