T Rex Move Over; 7 Mapusaurus Found 18 April 2006

Total Page:16

File Type:pdf, Size:1020Kb

T Rex Move Over; 7 Mapusaurus Found 18 April 2006 T rex move over; 7 Mapusaurus found 18 April 2006 Remains of the largest known meat-eating dinosaur -- the 41-foot-long, 15,000-pound Mapusaurus roseae -- have been found in Argentina, paleontologists say. Bones from at least seven of the beasts were found in 100 million-year-old rocks near Plaza Huincul, Argentina. That suggests the meat eaters hunted in packs to catch the largest known dinosaur, the 125-foot Argentinosaurus, Museo Carmen Funes paleontologist Rodolfo Coria said Monday. "When I was growing up, Tyrannosaurus rex was the big, nasty meat-eater on (the) block, but here we've got other things vying for the king of nasty," said Tom Demere of the San Diego Natural History Museum in commenting on the find. "Up until a few years ago, dinosaurs from the southern hemisphere were almost nonexistent," Demere told The Los Angeles Times. "Now, with this work (in Argentina) and in Africa and Madagascar, we get a better sense of the dinosaur diversity." Paleontologists believe Mapusaurus roseae ran on its feet and had flesh-slicing teeth. Its name combines the Mapuche tribe word for "Earth" and project backer Rose Letwin. Copyright 2006 by United Press International APA citation: T rex move over; 7 Mapusaurus found (2006, April 18) retrieved 30 September 2021 from https://phys.org/news/2006-04-rex-mapusaurus.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. 1 / 1 Powered by TCPDF (www.tcpdf.org).
Recommended publications
  • Sereno 20060098.Vp
    Basal abelisaurid and carcharodontosaurid theropods from the Lower Cretaceous Elrhaz Formation of Niger PAUL C. SERENO and STEPHEN L. BRUSATTE Sereno, P.C. and Brusatte, S.L. 2008. Basal abelisaurid and carcharodontosaurid theropods from the Lower Cretaceous Elrhaz Formation of Niger. Acta Palaeontologica Polonica 53 (1): 15–46. We report the discovery of basal abelisaurid and carcharodontosaurid theropods from the mid Cretaceous (Aptian– Albian, ca. 112 Ma) Elrhaz Formation of the Niger Republic. The abelisaurid, Kryptops palaios gen. et sp. nov., is repre− sented by a single individual preserving the maxilla, pelvic girdle, vertebrae and ribs. Several features, including a maxilla textured externally by impressed vascular grooves and a narrow antorbital fossa, clearly place Kryptops palaios within Abelisauridae as its oldest known member. The carcharodontosaurid, Eocarcharia dinops gen. et sp. nov., is repre− sented by several cranial bones and isolated teeth. Phylogenetic analysis places it as a basal carcharodontosaurid, similar to Acrocanthosaurus and less derived than Carcharodontosaurus and Giganotosaurus. The discovery of these taxa sug− gests that large body size and many of the derived cranial features of abelisaurids and carcharodontosaurids had already evolved by the mid Cretaceous. The presence of a close relative of the North American genus Acrocanthosaurus on Af− rica suggests that carcharodontosaurids had already achieved a trans−Tethyan distribution by the mid Cretaceous. Key words: Theropod, abelisaurid, allosauroid, carcharodontosaurid, Kryptops, Eocarcharia, Cretaceous, Africa. Paul C. Sereno [[email protected]], Department of Organismal Biology and Anatomy, University of Chicago, 1027 E. 57th Street, Chicago, Illinois, 60637, USA; Stephen L. Brusatte [[email protected]], Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen’s Road, Bristol BS8 1RJ, United Kingdom.
    [Show full text]
  • Mongolian Geoscientist 50 (2020) 2-10
    Yun, Mongolian Geoscientist 50 (2020) 2-10 https://doi.org/10.5564/mgs.v50i0.1325 Mongolian Geoscientist Original article A Carcharodontosaurid tooth from the Hasandong Formation (Lower Cretaceous) of South Korea Chan-gyu Yun1,2* 1Vertebrate Paleontological Institute of Incheon, Incheon 21974, Republic of Korea 2Biological Sciences, Inha University, Incheon 22212, Republic of Korea *Corresponding author: [email protected] ARTICLE INFO ABSTRACT Article history: A large tooth of theropod dinosaur that was recovered from the Hasandong Received 04 April, 2020 Formation (Lower Cretaceous; Aptian-Albian) in Daedo island, Hadong Couty, South Gyeongsang Province of South Korea is redescribed. Although the tooth was Accepted 12 May, 2020 misidentified as a "Prodeinodon"-like megalosaurid theropod at the first time, detailed comparisons with known theropod dentition anatomy strongly indicate that this tooth belongs to an Acrocanthosaurus-like basal carcharodontosaurid theropod. This referral is supported by its combination of large size, ovoid-shaped cervix outline, mesial carina that does not reach the cervix, labially displaced distal carina and large number of denticles. This tooth is different from other carcharodontosaurid teeth from the same formation in several anatomical aspects (e.g., smaller overall size, presence of transverse lines adjacent to the distal carina, presence of interdenticular sulci in distal carina, denticle densities, crown basal ratio), indicating that carcharodontosaurid diversity in the Early Cretaceous of Korea could have been higher, although these differences may represent positional or individual variations. The presence of Acrocanthosaurus-like theropod teeth (e.g., "Prodeinodon", "Wakinosaurus") from early Cretaceous deposits (Valanginian-Cenomanian) of South Korea, Japan, Mongolia and China indicates that North American Acrocanthosaurus atokensis possibly represents a form that immigrated from the Asia.
    [Show full text]
  • Implications for Predatory Dinosaur Macroecology and Ontogeny in Later Late Cretaceous Asiamerica
    Canadian Journal of Earth Sciences Theropod Guild Structure and the Tyrannosaurid Niche Assimilation Hypothesis: Implications for Predatory Dinosaur Macroecology and Ontogeny in later Late Cretaceous Asiamerica Journal: Canadian Journal of Earth Sciences Manuscript ID cjes-2020-0174.R1 Manuscript Type: Article Date Submitted by the 04-Jan-2021 Author: Complete List of Authors: Holtz, Thomas; University of Maryland at College Park, Department of Geology; NationalDraft Museum of Natural History, Department of Geology Keyword: Dinosaur, Ontogeny, Theropod, Paleocology, Mesozoic, Tyrannosauridae Is the invited manuscript for consideration in a Special Tribute to Dale Russell Issue? : © The Author(s) or their Institution(s) Page 1 of 91 Canadian Journal of Earth Sciences 1 Theropod Guild Structure and the Tyrannosaurid Niche Assimilation Hypothesis: 2 Implications for Predatory Dinosaur Macroecology and Ontogeny in later Late Cretaceous 3 Asiamerica 4 5 6 Thomas R. Holtz, Jr. 7 8 Department of Geology, University of Maryland, College Park, MD 20742 USA 9 Department of Paleobiology, National Museum of Natural History, Washington, DC 20013 USA 10 Email address: [email protected] 11 ORCID: 0000-0002-2906-4900 Draft 12 13 Thomas R. Holtz, Jr. 14 Department of Geology 15 8000 Regents Drive 16 University of Maryland 17 College Park, MD 20742 18 USA 19 Phone: 1-301-405-4084 20 Fax: 1-301-314-9661 21 Email address: [email protected] 22 23 1 © The Author(s) or their Institution(s) Canadian Journal of Earth Sciences Page 2 of 91 24 ABSTRACT 25 Well-sampled dinosaur communities from the Jurassic through the early Late Cretaceous show 26 greater taxonomic diversity among larger (>50kg) theropod taxa than communities of the 27 Campano-Maastrichtian, particularly to those of eastern/central Asia and Laramidia.
    [Show full text]
  • Inferring Body Mass in Extinct Terrestrial Vertebrates and the Evolution of Body Size in a Model-Clade of Dinosaurs (Ornithopoda)
    Inferring Body Mass in Extinct Terrestrial Vertebrates and the Evolution of Body Size in a Model-Clade of Dinosaurs (Ornithopoda) by Nicolás Ernesto José Campione Ruben A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Ecology and Evolutionary Biology University of Toronto © Copyright by Nicolás Ernesto José Campione Ruben 2013 Inferring body mass in extinct terrestrial vertebrates and the evolution of body size in a model-clade of dinosaurs (Ornithopoda) Nicolás E. J. Campione Ruben Doctor of Philosophy Ecology and Evolutionary Biology University of Toronto 2013 Abstract Organismal body size correlates with almost all aspects of ecology and physiology. As a result, the ability to infer body size in the fossil record offers an opportunity to interpret extinct species within a biological, rather than simply a systematic, context. Various methods have been proposed by which to estimate body mass (the standard measure of body size) that center on two main approaches: volumetric reconstructions and extant scaling. The latter are particularly contentious when applied to extinct terrestrial vertebrates, particularly stem-based taxa for which living relatives are difficult to constrain, such as non-avian dinosaurs and non-therapsid synapsids, resulting in the use of volumetric models that are highly influenced by researcher bias. However, criticisms of scaling models have not been tested within a comprehensive extant dataset. Based on limb measurements of 200 mammals and 47 reptiles, linear models were generated between limb measurements (length and circumference) and body mass to test the hypotheses that phylogenetic history, limb posture, and gait drive the relationship between stylopodial circumference and body mass as critics suggest.
    [Show full text]
  • Sistema Institucional De Educación a Distancia De La Universidad Nacional De Río Negro (SIED UNRN)
    Dr. Ignacio Díaz Martínez (UNRN-CONICET) Docente-investigador de la Universidad Nacional de Río Negro [email protected] Sistema Institucional de Educación a Distancia de la Universidad Nacional de Río Negro (SIED UNRN) Curso virtual: Dinosaurios de la Patagonia1 MÓDULO 1: Historia de las investigaciones de dinosaurios en Argentina2 1 Curso Mooc “Dinosaurios de la Patagonia”, alojado en la plataforma mundial EdX, a través de la Universidad Universidad Nacional Nacional de Córdoba (https://www.edx.org). de Río Negro 2 Revisores de contenido: Dr. Rodolfo Coria, Dr. Leonardo Salgado, Dra. Marianella Talevi y Mg. Mattia Baiano MÓDULO 1: historia de las investigaciones de dinosaurios en Argentina. DINOSAURIOS DE LA PATAGONIA Objetivo del Módulo 1.1- EL PRIMER DINOSAURIO DE AMÉRICA DEL SUR 2 1: introducir al Y LA INFLUENCIA DE FLORENTINO AMEGHINO EN participante del curso LA PALEONTOLOGÍA ARGENTINA. a la historia de los EdX PATAGONIA DE LA DINOSAURIOS Actualmente, es habitual leer en los diarios sobre hallazgos de descubrimientos de nuevos dinosaurios en Argentina, y sobre todo en la Patagonia. fósiles de dinosaurios Allí se muestran fotografías de los investigadores tanto en el en Argentina haciendo campo como en los repositorios de los museos junto a los huesos hincapié en los que encontraron. También se suele mostrar al lector detalles lugares donde se propias de la excavación y de la posterior investigación: quiénes lo estudiaron, de qué universidades, qué características realizaron y las notables tienen los huesos, etc. No obstante, la historia de los personas que lo primeros.descubrimientos.fue.bastante diferente. hicieron posible. Todo empieza a finales del Siglo XIX durante la denominada “Campaña del Desierto”.
    [Show full text]
  • Mapusaurus Roseae N
    A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina Rodolfo A. CORIA CONICET, Museo Carmen Funes, Av. Córdoba 55, 8318 Plaza Huincul, Neuquén (Argentina) [email protected] Philip J. CURRIE University of Alberta, Department of Biological Sciences, Edmonton, Alberta T6G 2E9 (Canada) [email protected] Coria R. A. & Currie P. J. 2006. — A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina. Geodiversitas 28 (1) : 71-118. ABSTRACT A new carcharodontosaurid theropod from the Huincul Formation (Aptian- Cenomanian, Upper Cretaceous) of Neuquén Province, Argentina, is described. Approximately the same size as Giganotosaurus carolinii Coria & Salgado, 1995, Mapusaurus roseae n. gen., n. sp. is characterized by many features including a deep, short and narrow skull with relatively large triangular antorbital fossae, relatively small maxillary fenestra, and narrow, unfused rugose nasals. Mapu- saurus roseae n. gen., n. sp. has cervical neural spines and distally tapering epipo- physes, tall dorsal neural spines, central pleurocoels as far back as the first sacral vertebra, accessory caudal neural spines, stout humerus with poorly defined distal condyles, fused metacarpals, ilium with brevis fossa extending deeply into ischial peduncle, and femur with low fourth trochanter. Phylogenetic analysis indicates that Mapusaurus n. gen. shares with Carcharodontosaurus Stromer, 1931 and Giganotosaurus Coria & Salgado, 1995 several derived features that include narrow blade-like teeth with wrinkled enamel, heavily sculptured fa- cial bones, supraorbital shelf formed by a postorbital/palpebral complex, and a dorsomedially directed femoral head. Remains of Mapusaurus n. gen. were recovered from a bonebed where 100% of the identifiable dinosaur bones can KEY WORDS be assigned to this new genus.
    [Show full text]
  • Book|Club|Guide
    DinosaurEggsBookGuide:Layout 1 8/3/10 3:01 PM Page 1 SB&F BOOK |CLUB |GUIDE Dinosaur Eggs Discovered! Unscrambling the Clues Lowell Dingus, Luis M. Chiappe, Rodolfo Coria (Twenty First Century Books, 2008) What’s it about? Dinosaur Eggs Discovered is an account of one of the more significant scientific findings of the past decade. Paleontologists Dingus, Chiappe, and Coria walk the reader through their discov - ery of the largest nest of fossilized dinosaur eggs ever found. Chapter by chapter, essential questions that the site’s discovery raised are answered at length, with extensive explanation of any scientific processes involved given when appropriate. These questions range from attempting to dis - cover just what species of dinosaur laid the eggs, to searching for the disaster that initiated the fos - silization process leading to their preservation. Who is this book for? This book is geared towards middle schoolers in particular, but the scientific processes explained within make it worth the read to even high school students. Who wrote it? Dr. Lowell Dingus, Dr. Luis M. Chiappe, and Dr. Rodolfo Coria led the expedition that discovered the dinosaur nesting ground in Argentina. Dr. Dingus, a research associate at the American Museum of Natural History and the Natural History Museum of Los Angeles, was the head geologist on the team. He has been awarded the AAAS/Subaru’s SB&F Prize for Excellence in Science Books for his work on Dinosaur Eggs Discovered . More information on Dr. Dingus can be found here: http://www.infoquest.org/infoquest/directors.htm Dr. Chiappe, who is chairman of the Department of Vertebrate Paleontology at the Natural History Museum of Los Angeles County, researches fossil vertebrates and is an expert on the evolution of early birds.
    [Show full text]
  • For Heavyweight Titles
    RESEARCH NEWS PALEONTOLOGY known only from a single titanic vertebra discovered more than 100 yearsago in Colo- rado <andnow lost). '" " Argentine Dlnos Vie.:for The other new Paiag6nian mOrliterisalso a claimant for a heavyweight title, in this HeavyWeight Titles case going up against"Sue," a giant T. rex from South Dakota, for the carnivore title. Sue probably measured 15 meters and PLAZAHUINCUL, ARGENTINA-"I work weighed seven tons. The bones of the new with the biggest dinosaurs in the smallest theropod, excavated last year from a 110- museum,"paleontologist Rodolfo Coria likes million-year-old deposit by Coria and to say. Coria may be exaggerating slightly Leonardo Salgado of the University of about the size of the municipal museum in Comahue in the nearby city of Neuquen, this little town in northern Patagonia, but he include a thigh bone and an upper jaw that isn't kidding about the bones that crowd the are a few centimeters longer than matching halls there: They're the sizeofsmallrefrigera- bones of the South Dakota behemoth. But tors. These seven vertebrae belonged to because this theropod belonged to a different Argentinosaurus, a long-necked vegetarian lineage than Sue and had a heavier build, dinosaur, or sauropod, that may have out- Showing~oniespine. Vertebrae of Argentino- says Holtz, a theropod specialist, "I would weighed other giants by 40 metric tons. esutus, the largest a meter and a half high. expect this animal may have been several Move over, Seismosauius, Supersaurus, and tons heavier than Sue." Uuxasausus, contenders from the American Bonaparte of the MuseumofN atural History But whether the animal is truly the big- West.
    [Show full text]
  • Appendix S1–Neovenatoridae Benson, Carrano, Brusatte 2009
    Appendix S1–Neovenatoridae Benson, Carrano, Brusatte 2009 A new clade of archaic large-bodied predatory dinosaurs (Theropoda: Allosauroidea) that survived to the latest Mesozoic Benson RBJ, Carrano MT & Brusatte SL. Appendix S1 (a) Institutional abbreviations. AODF, Australian Age of Dinosaurs, Queensland, Australia; BMNH, Natural History Museum, London, UK; BYU, Brigham Young University Museum of Geology, Provo, Utah, USA; FPDM, Fukui Prefectural Dinosaur Museum, Fukui, Japan; IVPP, Institute of Vertebrate Paleontology and Paleoanthropology, Beijing, China; MCNA, Museo de Ciencas Naturales y Anthropológicas (J.C. Moyano) de Mendoza, Mendoza, Argentina; MCF, Museo Carmen Funes, Plaza Huincul, Argentina; MIWG, ‘Dinosaur Isle’ Museum of Isle of Wight Geology, Sandown, UK; MNN, Musée National du Niger, Niamey, Niger; MPM Museo Padre Molina, Río Gallegos, Santa Cruz, Argentina; MUCP, Museo de Geología y Paleontología, Universidad Nacional del Comahue, Neuquén, Argentina; NCSM, North Carolina State Museum, Rayleigh, USA; NMV, Museum of Victoria, Melbourne, Australia; OMNH, Sam Noble Oklahoma Museum of Natural History, Norman, Oklahoma, USA; UMNH, Utah Museum of Natural History, Salt Lake City, Utah, USA; ZPAL, Institute of Palaeobiology, Polish Academy of Sciences, Warsaw, Poland. (b) Comparisons. We directly examined all specimens of Chilantaisaurus, Megaraptor and Neovenator , and inspected high-quality casts and original bones of Aerosteon and published images of Australovenator (Hocknull et al. 2009), Fukuiraptor (Azuma & Currie 2000; Currie & Azuma 2006) and Orkoraptor (Novas et al. 2008). This formed part of an ongoing review of the taxonomy and systematics of basal theropods (MTC, RBJB & S.D. Sampson unpublished data; Carrano & Sampson 2004, 2008; Brusatte & Sereno 2008; Benson in press). A summary of the comparisons made here is presented in table S1.
    [Show full text]
  • The Dentition of Megalosaurid Theropods
    The dentition of megalosaurid theropods CHRISTOPHE HENDRICKX, OCTÁVIO MATEUS, and RICARDO ARAÚJO Hendrickx, C., Mateus, O., and Araújo, R. 2015. The dentition of megalosaurid theropods. Acta Palaeontologica Polo- nica 60 (3): 627–642. Theropod teeth are particularly abundant in the fossil record and frequently reported in the literature. Yet, the dentition of many theropods has not been described comprehensively, omitting details on the denticle shape, crown ornamentations and enamel texture. This paucity of information has been particularly striking in basal clades, thus making identification of isolated teeth difficult, and taxonomic assignments uncertain. We here provide a detailed description of the dentition of Megalosauridae, and a comparison to and distinction from superficially similar teeth of all major theropod clades. Megalosaurid dinosaurs are characterized by a mesial carina facing mesiolabially in mesial teeth, centrally positioned carinae on both mesial and lateral crowns, a mesial carina terminating above the cervix, and short to well-developed in- terdenticular sulci between distal denticles. A discriminant analysis performed on a dataset of numerical data collected on the teeth of 62 theropod taxa reveals that megalosaurid teeth are hardly distinguishable from other theropod clades with ziphodont dentition. This study highlights the importance of detailing anatomical descriptions and providing additional morphometric data on teeth with the purpose of helping to identify isolated theropod teeth in the future. Key words: Theropoda, Tetanurae, Megalosauridae, dentition, teeth, morphometry. Christophe Hendrickx [[email protected]] and Octávio Mateus [[email protected]], Universidade Nova de Lisboa, GeoBioTec (formerly CICEGe), Departamento de Ciências da Terra, Faculdade de Ciências e Tec- nologia, Quinta da Torre, 2829-516, Caparica, Portugal; Museu da Lourinhã, 9 Rua João Luis de Moura, 2530-158, Lourinhã, Portugal.
    [Show full text]
  • New Information on the Cranial Anatomy of Acrocanthosaurus Atokensis and Its Implications for the Phylogeny of Allosauroidea (Dinosauria: Theropoda)
    New Information on the Cranial Anatomy of Acrocanthosaurus atokensis and Its Implications for the Phylogeny of Allosauroidea (Dinosauria: Theropoda) Drew R. Eddy*¤, Julia A. Clarke¤ Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina, United States of America Abstract Background: Allosauroidea has a contentious taxonomic and systematic history. Within this group of theropod dinosaurs, considerable debate has surrounded the phylogenetic position of the large-bodied allosauroid Acrocanthosaurus atokensis from the Lower Cretaceous Antlers Formation of North America. Several prior analyses recover Acrocanthosaurus atokensis as sister taxon to the smaller-bodied Allosaurus fragilis known from North America and Europe, and others nest Acrocanthosaurus atokensis within Carcharodontosauridae, a large-bodied group of allosauroids that attained a cosmopolitan distribution during the Early Cretaceous. Methodology/Principal Findings: Re-evaluation of a well-preserved skull of Acrocanthosaurus atokensis (NCSM 14345) provides new information regarding the palatal complex and inner surfaces of the skull and mandible. Previously inaccessible internal views and articular surfaces of nearly every element of the skull are described. Twenty-four new morphological characters are identified as variable in Allosauroidea, combined with 153 previously published characters, and evaluated for eighteen terminal taxa. Systematic analysis of this dataset recovers a single most parsimonious topology placing Acrocanthosaurus atokensis as a member of Allosauroidea, in agreement with several recent analyses that nest the taxon well within Carcharodontosauridae. Conclusions/Significance: A revised diagnosis of Acrocanthosaurus atokensis finds that the species is distinguished by four primary characters, including: presence of a knob on the lateral surangular shelf; enlarged posterior surangular foramen; supraoccipital protruding as a double-boss posterior to the nuchal crest; and pneumatic recess within the medial surface of the quadrate.
    [Show full text]
  • Aucasaurus Garridoi
    Brief report Acta Palaeontologica Polonica 60 (1): 141–144, 2015 The endocranial morphology and inner ear of the abelisaurid theropod Aucasaurus garridoi ARIANA PAULINA-CARABAJAL and CECILIA SUCCAR A partial cranial endocast and right inner ear of the Creta- sified otic capsule is complete, allowing study of the inner ear ceous abelisaurid dinosaur Aucasaurus garridoi were digi- morphology using digital reconstructions based on CT scans. tally reconstructed from CT scans. The forebrain, midbrain, and hindbrain resemble the morphology described for the Institutional abbreviations.—MCF, Carmen Funes Museum, abelisaurids Majungasaurus and Indosaurus. However, Au- Plaza Huincul, Neuquén Province, Argentina. casaurus exhibits a floccular process that is relatively larger Other abbreviations.—asc, anterior semicircular canal; lsc, lat- than that of Majungasaurus. In Aucasaurus the flocculus is eral semicircular canal; psc, posterior semicircular canal. enclosed in an 8-shaped floccular recess, similar in shape and size to that observed in Abelisaurus, suggesting that the two Patagonian taxa were capable of a slightly wider range Material and methods of movements of the head. Here we describe the second inner The braincase of Aucasaurus (MCF-PVPH 236) was scanned ear known for the Abelisauridae. The labyrinth of the inner using a medical CT machine (SIEMENS Sensation 64), with ear is similar in shape and size to the semicircular canals of slices at 0.63 mm intervals. Virtual three-dimensional inner ear Majungasaurus, although the lateral semicircular canal is and cranial endocasts were obtained and visualized using the shorter in Aucasaurus. software Mimics (14.0) and Geomagic (10.0) at the University of Alberta, Vertebrate Paleontology Laboratory.
    [Show full text]